BSNL PAPER

BSNL PAPER
When a inductive coil connected to a 200 V, 50Hz ac supply with 10A current flowing through it dissipates 1000 watts then which of the following will have least value in ohms-
a.) Resistance

b.) Reactance

c.) Impedance

d.) None



Oscillator crystal are made of –

a.) Silicon

b.) Germanium

c.) Quartz

d.) None

For small size, high frequency coils, the most common core material is-

a. )Air

b. )Ferrite

c.) Powdered ion

d.) Steel

If we have a parallel plate capacitor of plate area 'A' and plate separatoin t and having a capacity C and a metallic plate r of area A and of negligible thickness is introduced in the capacitor at a distance from either of the two plates as shown in the given figure then the capacity of the capacitor will become –



a.)

b.) C

c.) 2C

d.) 4C

A superconductor is a –

a.) A material showing perfect conductivity and Meissner effect below a critical temperature

b.) A conductor having zero resistance

c.) A perfect conductor with highest di-magnetic susceptibility

d.) A perfect conductor which becomes resistance when the current density through it exceeds a critical value



When an inductor tunes at 200 KHz with 624 pF capacitor and at 600 KHz with 60.4 pF capacitor then the self capacitance of the inductor would be –

a) 8.05 pF

b) 10.05pF

c.) 16.01pF

d.) 20.01pF

Sparking occur when a load is switched off because the circuit has high –

a.) Inductance

b.) Capacitance

c.) Resistance

d.) None

Sparking between contacts can be reduced by inserting a –

a.) Resistance in the line

b.) Capacitor in series with contacts

c.) Capacitor in parallel with contacts

d.) None

RF amplifier of an A.M. receiver is normally biased in –

a.) Class 'A'

b.) Class 'b'

c.) Class 'C'

d.) None

The value of gate voltage for the operation of enhancement of only N channel MOSFET has to be –

a.) High positive

b.) High negative

c.) Low positive

d.) Zero

The input gate current of a FET is –

a.) a few microamperes

b.) negligibly small

c.) a few milliamperes

d.) a few amperes

In the following fig. with R = 30k, the value of current through 2 K resistor is –



a.) 25 mA

b.) 40 mA

c.) 25/16 mA

d.) 10 mA

A step recovery diode –

a.) has on extremely short recovery time

b.) conducts equally well in both directions

c.) is mainly used as a harmonic generator

d.) is an ideal rectifiers of high frequency signals

In order to get maximum undistorted output signal from CE amplifier with VCC 10V, the value of VCE (Q) should be approximately-

a.) 0.1V

b.) 5V

c.) 10V

d) V

In a FET the electrode, which corresponds to collector in bipolar transistor, is –

a.) source

b.) drain

c.) gate

d.) none

The device which acts like an NPN and a PNP transistor connected base to base and emitter to collector is –

a.) Triac

b.) UJT

c.) Diac

d.) SCR

A typical optical fibre has –

a.) High refractive index core and low refractive index cladding

b.) Low refractive index core and high refractive index cladding

c.) Both a and b

d.) None

In the following figure circuit diagram of an op-amp based is shown. The ratio is equal to –



a.) 9

b.) 11

c.) 10

d.) 21

When a loud speaker is connected across the terminals A and B of the network shown in the fig. then its impedance to obtain maximum power dissipation in it will be –



a.) 3 – j1

b.) 3 + j9

c.) 7.5 + j 2.5

d.) 7.5 – j 2.5

In the lattice network, the value of R for the maximum power transfer to the load –



a.) 5

b.) 6.5

c.) 8

d.) 9

For a lossy transmission line short circuited at the receiving end, the input impedance is given by (Z0 is the characteristic impedance, Ö is the propagation constant and l is the length of the line-

a.) Z0 cot h Öl

b.) Z0 cot Öl

c.) Z0 tan h.Ö l

d.) Z0 tan Öl

The approximate thickness of the radome wall should be –

a.) l

b.) l/4

c.) l/2

d.) l/8

A relatively permanent information is stored in

a. ) ROM

b.) RAM

c.) PROM

d.) Volatile memory



The rise time of the RC network shown in the given figure is approximately equal to –





b.) RC

c.) 2RC

d.) 4RC

If in the network shown in the fig. initially a steady state is attained by closing the switch 's' and then if the switch is opened at t = 0, then the current i(t) through the inductor will be –



a.) cos50tA

b.) 2A

c.) 2cos100tA

d.) 2sin50tA

When the p network of figure – I and T-network of figure – II are equivalent then the values of R1, R2 and R3 will be respectively –



a) 9W, 6W and 6W

b.) 6W, 6W and 9W

c.) 9W, 6W and 9W

d.) 6W, 9W and 6W

When the impedance matrices of a two port networks are given by and , then if these two networks are connected in series then the impedance matrix of the resulting two-port network will be –







d.) indeterminate

Joule/coulomb is the unit of -

a.) Electric field potential

b.) Potential

c .) Charge

d.) None of the above

The electric field line and equipotential lines-

a.) Are parallel to each other

b.)Are one and same

c.) Cut each other orthogonally

d.)Can be inclined to each other at any angle

For a lossy transmission line short circuited at the receiving end, the input impedance is given by (When Z0 is the characteristic impendence g is the propagation constant and L is the length of the line









When two equal positive point charges are placed along X- axis at X1 and –X1 respectively then the electric field vector at a point P on the positive Y-axis will be directed-

a.) In the +x direction

b.) In the –x direction

c. ) In the +y direction

d.) In the –y direction

The directions of and in TEM mode transmission line with respect to the direction of propagation are-

a.) Both and are transverse to the direction of propagation

b.) is and are transverse and h has a component in the direction of propagation

c.) is entirely transverse and has a component in the direction of propagation

d. ) is entirely transverse and has a component in the direction of propagation

The lowest TM mode in a rectangular waveguide of cross –section a x b with a>b will be-

a.) TM01

b.)TE10

c.) TM112

d.)TE11



When a transmitter in a free space radiates a mean power of ‘p’ watts uniformly in all directions then at a distance d sufficiently far from the source in plane the electric field E should be related to p and d as –









. When a dipole antenna was radiating with some excitation in free space radiating a certain amount of the power v if then this antenna is immersed in a lake where water is non-dissipative but has a dielectric constant of 81, then the radiated power with the same excitation will be

a.) Decrease to finite non-zero value

b.)Remain the same

c. )Increase

d.)Decrease to zero

When a (75 – j40)W load is connected to a coaxial line of Z0 = 75 W at 6MHz then the load matching on the line can be accomplished by connecting-

a.) A short – circuited stub at the load

b.)An inductance at the load

c. )A short circuited stub at a specific distance from the load

d.)none of the above

As compared to analog multimeters, digital multimeters are –

a.) less accurate

b.) more accurate

c.) equally accurate

d.) none.

When a signal of 10 mV at 75 MHz is to be measured then which of the following instruments can be used –

a.) VTVM

b.) Cathode ray oscilloscope

c.) Moving iron voltmeter

d.) Digital multimeter

Which of the following statement is true about two wattmeter method for power measurement in three phase current ?

a.) power can be measured using two wattmeter method only for star connected three phase circuits.

b.) when two meter show indentical readings, in the power factor is 0.5.

c.) when power factor is unit, one of the wattmeter reads zero

d.) when the reading of the two wattmeters are equal but of opposite sign, then the power factor is zero –

When a capacitance transducer has two plates of area 5cm2 each, separated by an air gap of 2mm than the displacement sensitivity in pf/cm due to gap change would be –

a.) 11.1

b.) 44.2

c.) 52.3

d.) 66.3

The Q of a radio coil –

a.) is independent of frequency

b.) increases monotonically as frequency increases

c.) decreases monotonically as frequency increases

d.) increases upto a certain frequency and then decreases beyond that frequency

When a generator of internal impedance and operating at 1GHz feeds a load via a coaxial line of characteristic impedance 50 ohm then the voltage wave ratio on the feed line is –

a.) 0.5

b.) 1.5

c.) 2.5

d.) 1.75

The coding system typically used in digital telemetry is –

a.) PPM (pulse position modulation)

b.) PAM (pulse amplitude modulation)

c.) PCM (pulse code modulation)

d.) PDM (pulse duration modulation)

Radiation pyrometers are used for the measurement of temperature in the range of –

a.) -2000C to 5000C

b.) 00C to 5000C

c.) 5000C to 12000C

d.) 12000C to 25000C

In the given figure band structure is shown. It is of –



a.) Gallium Avesenide (GaAs)

b.) Silicon (Si)

c.) Copper (Cu)

d.) Germanium (Ge)

When anode is positive with respect to cathode in an SCR, the numbers of blocked p-n junction is –

a.) 1

b.) 2

c.) 3

d.) 4

The circuit symbol for a GTO is

a. b.

c. d.





In the given fig. mark out the type of Cyclo converters



a.) 1 phase to 1 phase with continuous conduction

b.) 1 phase to 1 phase with discontinuous conduction

c.) step up device

d.) 3 phase to 1 phase device



In the given fig. A-1, C=5, m H and C=20 m F, C is initially charged to 200 V. After the switch.

S is closed at t = 0 the

maximum value of current and the

time at which it reaches this value are respectively.



a.) 400 A, 15.707 mS

b.) 50 A, 30 mS

c.) 100 A, 62.828 mS

d.) 400 A, 31.414 mS



50. In the given circuit the maximum current in the main SCR M can be-



a.) 200 A

b.) 170.7 A

c.) 141.4 A

d.) 70.7 A



The transfer function of an amplifier is given by



The high 3-db frequency of the amplifier will approximately

a.) 5850 KHZ

b.)585 KHZ

c.) 5850 HZ

d.)585HZ



In comparison to full wave rectifier with two diodes the four divide bridge rectifier has the dominant advantage of -

a). Higher current carrying

b.)Lower ripple factor

c.) Higher efficiency

d.)Lower peak increase voltage require



Power output increase in a class-c amplifier-

a.) If the conduction angle decrease

b).If the conduction angle increase

c.) Are not governed by the conduction angle

d.)None of the above

A transistor with hie = 1.5 k and hfe = 75 is used in an emitter follower circuit where R1 and R2 are used for normal biasing . Approximate value of it’s current amplification is-

a.)75

b.)76

c.)75/76

d.)-75

Amplifier of class B has high theoretical efficiency of 78.5 percent because-

a.) It is biased almost to saturation

b.)Its quiescent current is low

c.)It’s output is an exact replica of it’s input

d.)It is biased well below cut off

The coupling that produces minimum interference with frequency response is-

a.) Direct coupling

b.)Impedance coupling

c.) R C coupling

d.)Transformer coupling

In the circuit shown in the given figure Rf provides



a.) Current series feedback

b.)Current shunt feedback

c.) Voltage series feedback

d.)Voltage shunt feedback

Mark the correct relation for the junction transistor









Data in the serial form can be converted into parallel form by using –

a.) PISO shift register

b.) SOIP shift register

c.) SIPO shift register

d.) POIS shift register

PROMs are used to store-

a.) bulk information

b.) information to be accessed rarely

c.) sequence information

d.) relatively permanent information

The horizontal axis in a 3 bit unipolar D/A converter represents-

a.) Output bit combination

b.) analog output voltage

c.) input bit combination

d.) none of the above

'Not allowed' condition in NAND gate SR flip flop is –

a.) s = 0, R = 0

b.) s = 1, R = 1

c.) s = 0, R = 1

d.) s = 1, R = 0

Name the fastest logic family-

a) TTL

b.) RTL

c.) DCTL

d.) ECL

Equation corresponding to De Morgan's theorem in Boolean Algebra is –

a.) (A+B) (A+B) = AA + AB + BA + BB



c.) A + AB = A

d.) None of the above

In the given fig find radix of the system –



a.) 2
b.) 4

c.) 6

d.) 8



Modems are used for data transmission telephone lines to –

a.) increase the transmission capacity

b) improve noice performance

c.) incorporate error control coding

d.) eliminate dc component in the transmitted signal

The figure of a control system is shown. The maximum value of gain K for which the system is stable is-



a.)

b.) 3

c.) 4

d.) 5

Identify the example of open-loop system-

a.) A windscreen wiper

b.) Aqualung

c.) Respiratory system of an animal

d.) A system for controlling Anti-rocket missiles.

Consider the following expressions indicating the step or impulse response of an initially relaxed control system-

1. (5 – 4e-2+) u(t)

2. (e-2t +5) (u(t))

3 .V(t) + 8e-2t u(t)

4 . V(t) + 4e-2t 4(t)

Those which correspond to the step and impulse response of the same system include-

a.) 1&3

b.) 1&4

c.) 2&4

d.) 1&4



A system is described by



To test its stability by Lyapunov’s method the following V functions are considered.



Mark the most suitable V-function in this case-

a.) Only V1

b.) Only V2

c.) Both V1 and V2

d.) Neither V1 nor v2



Identity the polar plot of a typical type zero system with open loop transfer function













The scattering matrix of a magic –tee shown in the given figure is-















Which is the following relate to rational transfer function of a system-

1. Ratio of Fourier transform of output to input with zero initial conditions.

2. Ratio of Laplace transform of output to input with zero initial conditions.

3. Laplace transform of system impulse response.

4. Laplace transform of system unit step response select the correct answer using the codes given below.

Codes

a.) 1 and 4

b.) 2 and 3

c.) 1 and 3

d.) 2 and 4

For the signal g (t) – 10 cos (50 pt) cos2 (150at)

The Nyquist sampling state in t seconds is

a.) 150 samples per second

b.) 200 samples per second

c.) 300 samples per second

d.) 350 samples per second

In the case of a 70 MHz 1F carries for a transponder band width of 36 MHz; energy must lie between – MHz.

a.) 34 and 106

b.) 52. And 88

c.) 106 and 142

d.) 34 and 142

Radar used to eliminate clutter in navigational application is –

a.) Pulse radar

b.) Tracking radar

c.) MTI radar

d.) Mono pulse radar

The 1.55 mm windows is not yet in use with fiber optic systems because –

a.) The attenuation is higher than at 0.85 mm

b) The attenuation is higher than at 1.3mm

c.) Suitable laser devices have not yet been developed

d.) It does not lend itself to wavelength multiplexing

Pre-emphasis in FM systems involves-

a.) Compression of the modulating signal

b.) Expansion of the modulating signal

c.) Amplification of lower frequency components of the modulating signal.

d.) Amplification of higher frequency components of the modulating signal.

In a terrestrial microwave system transmission of signals is achieved through-

a.) reflection from the ionosphere

b.) line of sight mode

c) reflection from the ground

d.) diffraction from the stratosphere.



Casse grain feed is used with a parabolic reflector to

a.) increase the gain of the system

b). increase the bandwidth of the system

c.) reduce the size of the main reflector

d.) allow the feed to be placed at a convenient point.



In most microwave communication link rain drop attenuation is caused due to-

a.) scattering of microwaves by water drops of specific size.

b) scattering of microwaves by a collection of droplets acing as a single body.

c.) absorption of microwaves by water and consequent heating of the liquid

d.) absorption of the microwaves by water vapor in the atmosphere.



Circuit in the given figure represents. –



a.) an astable multivibrator

b.) A monostable multivibrator

c.) Voltage controlled oscillator

d.) Ramp generator



. . D = r is-

a.) Maxwell's 1st equation

b.) Maxwell's II equation

c.) Maxwell's III equation

d.) Maxwell’s IV equation



In a rectangular wave-guide which TM mode exists-

a.) TM00

b.) TM01

c.) Tm10

d.) TM11



In directional coupler a portion of power two velliry fram port 1) to port 2) is coupled to.

a). port 4

b). port 3

c.) port 2.

d.) port 3 & 4.





For high power i.e. 10 w to 50 kw measurement –

a.) Barometer are used

b.) Thermisters are used

c.) Calorimetric technique

d.) Calorimetric watt meter technique used

The difference between TWT & klystron is –

a.) In TWT electrons are in contact with RF field for long time & in klystron for short time

b.) In klystron electrons are in contact with RF field for long time & in TWT for short time

c.) In klystron there is no contact in RF field & electrons while in TWT there is contact

d.) In TWT phase is no contact is RF field & electrons while in klystron there is contact

Which one is most suitable for transmission through wave guide-

a.) Hown antennas

b.) Bioconical antennas

c.) helical antenna

d. )Discone

The skip distance of microwave is given by –

a.)

b. )

c.)

d.)

How many general purpose registers 8085mp-

a.) 4

b.) 6

c.) 8

c.) 10

8085 mP has no. of addressing modes-

a.) 2

b.) 3

c.) 4

d.) 5

What will be status of z and c y flag after execution of SUB A instruction

a.) z = 0, cy = 0

b.) z = 0, cy = 1

c.) z = 1, cy = 0

d.) z = 1, cy = 1



Microprocessor accept interrupt only if.

a.) interrupt flip flop disabled.

b.) when INTA signal is low.

c. ) interrupt flip flop enabled.

d.) none of above.

Microprogramming is a technique

a.) for programming the microprocessor

b.) for writing small programs efficiently

c.) for programming the control steps of computer

d.) for programming o/p / i/p

High level programs like C are converted into machine language with the help of

a.) interpreter

b.) compiler

c.) operating

d.) system

(10110011)2 = (?)8

a.) 253

b.) 263

c.) 273

d.) 283

A Not gate at the output of AND gate converts AND gate into-

a.) NAND

b.) NOR

c.) AND

d.) NOPE.

The O/P of a logic gate is the gate must be-

a.) AND

b.) OR

c.) NAND

d.) X-OR

A symbol of JK flip flop is-











A demultiplener-

a.) has multiple i/p and single o/p

b.) has multiple i/p and multiple o/p

c.) has multiple i/p and multiple o/p

d.) has single i/p and single o/p

. Which of the following best describes the authour`s attitude toward fairy tales ?

a.) fascination

b.) open approval.

c.) Indulgent tolerance.

d.) Scornful.

What type of sentence is this ?

Hurray! We won the match

a.) Exclamatory

b.) assertive

c.) Negative

d.) Affirmative

Before which of the following word will you put 'a'

a.) hour

b.) M. A.

c.) Umbrella

d.) Man

The noun form of 'fresh' is –

a.) freshly

b.) freshen

c.) fresheners

d.) fresh itself

The word 'clang' is an example of –

a.) Simile

b.) inversion

c.) onomatopoeia

d.) irony

The Forbes magazine acclaimed Azim Premji as richest India's is the chairman of-

a.) Pentafour software

b) Infosys

c.) IBM

d.) Wipro

Bharat Ratna award for the year 2001 goes to-

a.) Lata Mangeshkar and Zakeer Hussain

b.) Zakeer Hussain and Bismillah Khan

c.) Bismillah Khan and Lata Mangeshkar

d.) Lata Mangeshkar and Ustad Amzad Ali Khan

Mr. George W-Bush takes over as ------ President of the united states of America succeeding Mr. Bill Clinton-

a.) 42nd

b.) 43rd

c.) 40th

d.) 45th

New Chief Minister of Pondicherry is-

a.) T. Venkat Naidu

b.) K. Hari Harh

c.) N. Rengaswany

d.) M. Mudliar

No court has the jurisdiction to interfere with the election process once set in motion by the Election commission. This is enshrined in Article-

a.) 311

b.) 329

c.) 356

d.) 365

Ostrich is a-

a.) Running bird

b.) Flying bird

c) Swimming bird

d.) Migratory bird

The main atmospheric gas responsible for green house is-

a.) Oxygen

b.) Nitrogen

c.) Ozone

d.) Carbon-dioxide

Which of the following is not a Kharif Crop-

a.) Rice

b.) groundnut

c.) Sugarcane

d.) gram

The function of World Bank is to-

a.) Help in reconstruction and development of world economy

b.) Facilitate poor countries to trade on concessional rates

c.) Promote growth of international trade and equilibrium in balance of payments

d.) Ease trade barriers and establish rule of fair trade

Speed of sound is maximum in-

a. )Water

b.) Air

c.) Steel

d.) Vacuum

“Long years ago we made a trust with destiny.” Whose words are these-

a.) Subhash Chandra Bose

b.) Jawaharlal Nehru

c.) Lajpat Rai

d.) Bhagat Singh

Durand cup is associated with-

a.) Hockey

b.) Tennis

c.) Football

d.) Badminton

Rabindranath Tagore was awarded the Nobel Prize in literature in the year.

a.) 1908

b.) 1910

c.) 1913

d.) 1914

India successfully conducted its first underground nuclear experiment at Pokhran in Rajas than on-

a.) May 18, 1975

b.) May 20, 1974

c) May 17, 1974

d.) May 17, 1974

An emergency loan of $ 500 million to help reconstruct infrastructure in earth quake devastated Gujarat approved by-

a.) Asian development Bank

b.) World Bank

c.) Swiss Bank

d.) Reserve Bank of India

BSNL GE-JTO Recruitment Examination

BSNL GE-JTO Recruitment Examination


Test Paper - VI

At a frequency below the resonant frequency series circuit is-
a.) Inductive

b.) Capacitive

c. )Resistive

d.)None

The electrical conductivity of metals is typically of the order of (Ohm –1 m-1) -

a.) 107

b. )105

c. )10-4

d. )10-6

he output of a piezoelectric crystal has-

a. )Low amplitude and low impedance

b. )High amplitude and high impedance

c. )Low amplitude and high impedance

d.)High amplitude and low impedance

The time constant associated with the capacitor charging in the circuit shown in the given figure is –



a. )6ms

b. )10ms

c. )15ms

d.) 25ms

The Q factor of an inductor would be higher if it is made of –

a.) Thinner wire

b.) Longer wire

c.) Shorter wire

d.) Thicker wire

A cavity resonator can be represented by –

a.) An LC circuit

b.) An LCR circuit

c.) A lossy inductor

d.) A lossy capacitor

Air gap in the iron core of an inductor prevents –

a.) Core saturation

b). Hysterisis loss

c.) Flux leakage

d.) Transformer action

Between the plates of an air capacitor if a glass slab is slipped without moving the plate then -

a.) Its capacitance is decreased

b.) Its capacitance is increased

c.) Its capacitance is hardly affected

d. )Capacitor is discharged

For current to flow, a circuit must be –

a.) Isolated

b). Insulated

c.) Complete

d.) Protected

Human ear can detect sound intensities of the order of –

a.) 10-20 w/m2

b). 10-13 w/m2

c.) 10-6 w/m2

d.) 10-3 w/m2

A FET operates on –

a). Majority carriers only

b). Minority carriers only

c). Positively charged ions only

d.) None

An SCR can conduct for a full half cycle or any part of it –

a. )and continue conduction for other half cycle

b.) but blocks the conduction for other half cycle

c.) nothing can be said

d.) none

In CRT aquadag carries -

a. )aqueous solution of graphite

b. )sweep voltage

c. )secondary emission electrons

d.) none of the above

From the following circuit, in order to obtain a 12-v stabilized supply the input to the terminals A and B

should be -



a.)less than 12v with terminal A positive with respect to terminal B

b. )greater than 12v with B positive with respect to A

c. )less than 12v with A negative with respect to B

d. )greater than 12v with A positive with respect to B

When the value of ICBO in a silicon transistor of b = 49 is 20 Na then the value of ICEO for a temperature rise of 180c would be –

a. )8mA

b. )160 hA

c. )1mA

d. )7.84mA

MOSFET can operate in –

a. )Depletion mode

b. )Enhancement mode

c. )Depletion-only mode

d. )Both a & b

For a circuit design the very factor of an SCR, which is to be taken into account is –

a. )




d.) None

The functions of an oxide layer in an IC device is to –

a.) mask against diffusion or ion implant

b.) insulate the surface electrically

c.) produce a chemically stable protective layer

d.) all the above

One of the following bipolar transistors which has the highest current gain bandwidth product for similar geometry is –

a.) NPN germanium transistor

b.) NPN silicon transistor

c.) PNP germanium transistor

d. )PNP silicon transistor.

With the increasing temperature, the electrical conductivity would –

a.) Increase in metals as well as in intrinsic semiconductors.

b.) Increase in metals but decrease in intrinsic semiconductors.

c. )Decrease in metals but increase in intrinsic semiconductors.

d. )Decrease in metals as well as in intrinsic semiconductors.

For the following circuit, the current X is 3A then the power delivered by the dependent current source D is –



a.) 50 watts

b) 50 watts

c. )1500 watts

d. )15000 watts

The current in resistor R shown in the fig. will be –



a.) 0.2A

b.) 0.4A

c.) 0.6A

d.) 0.8A

In the network shown in the given fig. the capacitor C1 is initially charged to a voltage V0 before the switch S in the circuit is closed. In the steady state-



a.)C1 and C2 are charged to equal voltages

b.) C1 and C2 are charged with equal coulombs

c. )C1 and C2 are discharged fully

d. ) C2 alone is charged to voltage V0

The equivalent circuit of a wire-wound resistor can be represented as –









For the fig. shown the fundamental cutset for the branch 12 is –



a. )2, 1, 5

b. )2, 6, 7, 8

c. )2, 1, 3, 4,5

d. )2, 3, 4

Ideally, attenuator pads should not change –

a. )voltage level

b.) impedance level

c.) power level

d.) voltage, power or impedance level

When the two networks are cascaded through an ideal Buffer and if tr1 and tr2 are the rise times of the two networks, then the overall delay of the two networks together will be –









For the network shown in the following fig. one of the following theorems which can be conveniently used to calculate the power consumed by the 10W resistor is –



a. )Thevenin's theorem

b.) Maximum power transfer theorem

c.) Millman's theorem

d.) Superposition theorem

The nodal analysis is primarily based on the application of –

a. )KVL

b.) KCL

c.) Ohm's law

d.) Both b and c

When the driving point impedance of a network at a frequency of 1Hz is then the impedance can be realised as –









For a lossless line-

1. Series resistance is zero 2. Shunt conductance is zero

3. Shunt conductance is infinite 4. Series resistance is infinite

a. ) 1 & 2

b. )2 & 3

c. ) 2 & 4

d.)3 & 4

When a square wave is fed to an RC circuit then-

a.) Voltage across R is square and across C is not square

b) Voltage across C is not square and across R is not square

c. ) Voltage across both R and C are square

d. )Voltage across both R and C are not square

When an A.M. broadcast radio transmitter radiates 10 kw power when the modulation percentage is 60 then the power of the carrier is-

a. ) 5.00 kw

b.) 7.69 kw

c.) 8.47 kw

d.) 9.17 kw

The main components of atmosphere responsible for absorption of em waves are -

a. ) Nitrogen and Oxygen

b. )Nitrogen and hydrogen

c.) Oxygen and water vapour

d. )Nitrogen and water vapour

The effective height of a linear antenna of length ‘l’ is say ‘x’ when the current distribution along it’s length is uniform and say, it is ‘y’ when the current distribution is sinusoidal then x/y is equal to -

a.) 2

b.) 1

c. ) 4/ p

d.) p/4

In a hollow rectangular waveguide, the phase velocity -

a.) Increases with increasing frequency

b.)Decreases with increasing frequency

c. ) Is independent of frequency

d.)Will vary with frequency depending upon the frequency range

For TM waves in a parallel plate waveguide, the minimum attenuation arising from imperfect conductors would occur at a frequency of (fc is the cut–off frequency )-

a.) 3fc







When a transmission line having 50 impedance is terminated in a load of ( 40 + j30) W then the VSWR is –

a.) j 0.033

b.)0.8 + j 0.6

c.) 1

d.)2

The ionosphere plays a significant role in radio wave propogation at-

a. )High frequencies

b.)Ultra-high frequencies

c. ) Microwave frequencies

d.)Optical frequencies

When a carrier wave is modulated at 100% it’s power is increased by-

a. )100%

b. )150 %

c. )50%

d.) 0%

Reluctances in series are –

a. )Subtractive

b.) Additive

c.) Multiplicative

d.) None.

When the meters X and Y requires 40 mA and 50 mA respectively for full scale deflection then –

a. )X is more sensitive

b.) Y is more sensitive

c. )both are equally sensitive

d.) not possible to determine from the given data.

In the context of ac bridge measurement the term "Wagner Ground" means –

a.) a special RC connection that eliminates stray magnetic effects.

b.) any unwanted and unintended ground connection.

c.) a large metal plate buried in the ground and connected to one corner of the bridge.

d.) a special RC connection that eliminates stray capacitance effects.

The gating and counting circuits of a digital counter –

a. )cannot handle MHz signals

b.) cannot handle GHz signals

c. )can handle GHz signals

d.) none.

De- sauty bridge is more widely used because of –

a. )simplicity

b. )perfect balance for imperfect capacitors

c. )perfect balance for air capacitors

d.) maximum sensitivity.

A schottky diode clamp is used along with a switching BJT for –

a. )reducing the power dissipation.

b. )reducing the switching time

c. )increasing the value of b

d.) reducing the base current.

The phenomenon of creeping occurs in –

a. )Energy meters

b.) Ammeters

c. )Wattmeter

d. )Voltmeters

A permanent magnet moving coil measures the –

a. )true rms value

b.) dc value

c.) peak value

d. )rms plus dc value

49. The D`Arsonval meter movement can be converted into an audio frequency ac ammeter by adding to it a-

a. )thermocouple

b.) rectifier

c.) chopper

d. )transducer

Which one of the following detectors is generally used in ac bridges for audio frequency range ?

a. )Ac voltmeter

b. )CRO

c. )Headphones

d.) Vibration galvanometer.

In single phase circuit capacitor used for power factor correction decreases –

a.) The power factor

b.) The line current

c.) Both a and b

d.) The line current and increases power factor

In the given figure X the balanced bridge should be

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self-inductance having resistance

b. )A capacitance

c. )A non-Inductive resistance

d. )An inductance and a capacitance in parallel

SiO2 layer in an integrated circuit provides –

a. )Electrical connection to external circuit

b.) Physical strength

c. )Isolation

d. )Conducting path

For an SCR with turn on time of 5 microsecond, an ideal trigger pulse should have-

a. )short rise time with pulse width = 3 m sec

b. )vlong rise time with pulse width = 6 m sec

c. )short rise time with pulse width = 6 m sec

d.)long rise time with pulse width = 3 m sec

In a 3-phase half wave diode rectifier, the ratio of average output voltage to per phase maximum a c voltage is-

a) 0.955

b. )0.827

c.) 1.654

d. )1.169

In multiple pulse modulation used in PWN inverters, the amplitude and frequency for triangular carrier and square reference signals are respectively 4V, 6 KH2 and 1V, 1KH2. The number of pulses per half cycle and pulse width is respectively-.

a. )6, 900

b. )3, 450

c. )4, 600

d.) 3, 400

A four quadrant operation requires-

a. )two full converters in series.

b.) two full converters connected back to back.

c.) two full converters connected in parallel.

d.) two semi converters connected back to back

In voltage source inverters-

a. )load voltage waveform o depends on load impedance z, where as load current waveform io does not depend on z,

b. )Both o and io depend on z,

c.) o does not depend on z where as depends on z

d. )both o and do not depend on z

For an RC driving – point impedance function, the poles and zeros-

a. )should alternate on real axis

b.) should alternate only on the negative real axis

c.) should alternate on the imaginary axis

d.) can lie anywhere on the left half place.

The functions of connecting a resistor in series with gate - cathode circuit and a zener diode across gate cathode circuit are, respectively to protect the gate circuit from-

a.) over voltages, over currents.

b. )over currents over voltages.

c. )over currents, noise signals

d. )noise signals, over voltages.

The plate efficiency of a class C amplifier is high because-

a.) A resonant circuit is used as load

b.) The plate current flows when the instantaneous plate voltage is low.

c. ) The plate current flows only when grid is driven positive

d. )None of the above

The circuit diagram shown in the figure consist of transistor is -

a. ) Parallel connection

b.) Cascode connection

c. ) Darlington connection

d. )Cascade connection

Increase of current in one transistor in a direct coupled circuit -

a. ) Causes an increase in current in other transistors of the circuit

b. )Causes a decrease in current in other transistor

c. )Does not affect the currents of other transistors connected in the circuit

d. )May either increase or decrease currents of other transistors connected in the circuit.

In a PNP transistor the charge carriers in the base region which play an important role in the operation of the transistor are-

a. ) The majority carriers

b.) The minority carriers

c. ) Nothing can be said

d. )None of the above

Voltage gain in a CC amplifier is-

a. )Cannot exceed unity

b. )Is always constant

c. ) Is dependent on input signal

d. )Depends on output impedance

Random-access-memory means –

a. )memory in a random fashion

b. )memory in a zigzag fashion

c. )memory in a circular fashion

d. )memory in a square fashion

BCD code is –

a. )an alphanumeric code

b. )a binary code

c .) the same thing as binary numbers

d. )non-weighed

The transfer function of a system is . The phase swift at w = 0 and w = a will be -

a.) 900 and –00

b. )-900 and 900

c. )-1800 and 1800

d. )None of the above

Number of resolutions in a 8 bit D/A converter is –

a. )8 bit

b.) 4 bit

c. )6 bit

d.) 10 bit

A bistable multivibrator is used as a –

a.) Free running multivibrator

b.) Frequency multiplier

c.) Frequency divider

d. )Wave shaper

The transfer function of a system is The phase shift at w = o and w = will be –

a. )900 and -00

b. )–900 and 900

c. )–1800 and 1800

d. )none of the above.

A forward path transfer function of a unity feedback control system is equal to The unit step response of this system starting from rest will have its maximum value at a time equal to –

a. )0 sec

b. )0.56 sec

c. )5.6 sec

d.) infinity.

To obtain the output position in a position control system, which one of the following transducers is used-

a.) Strain Gauge

b.) Load cell

c. )Synchro

d.) Thermistor

The maximum resonance peak for the second order transfer function T(S) = will be –

a. )4

b. )4/3

c. )2



Considering control system in the given fig .



For slight variation in G, the ratio of open loop sensitivity to closed pool

sensitivity will be given by-

a.) 1: (1+GH)

b.) 1 : (1+GH)-1

c. )1 : (1-GH)

d. )1 : (1-GH)-1

The diversity system in Troposcatter links is made use of to-

a. )Increase the bandwidth

b.) Prevent noise effects

c.) Increase the directivity of the antenna.

d.) Detect signal in the presence of fading.

Mark out wrong statement regarding compandor-

a.) It compresses the higher amplitude parts of a signal before modulation and expands them back to normal again after demodulation.

b.) It gives preferential treatment to the weaker parts of the signal

c.) For weaker signals, it gives a poor ratio of signal strength to quantizing error.

d. )Weaker signals, transverse more quantum steps than they would do otherwise and so quantizing error is reduced

Among other equipment a sub marine cable repeater contains –

a.) A dc power supply and regulator

b. )Filters for the two directions of transmission

c.) Multiplexing and demultiplexing equipment

d.) Pilot inject and pilot extract equipment

In a communication system noice is most likely to affect the signal-

a.) At the transmitter

b.) In the channel

c.) In the information source

d.) At the destination

The given circuit is a –



a.) Monostable multivibrator

b.) Frequency division circuit

c.) Miller sweeps circuit

d.) Bootstrap sweep circuit

In a plane transverse electromagnetic wave-

a.) Angle between electric and magnetic vectors is O.

b.)Angle between electric and magnetic vectors is 900

c.) Angle between electric and magnetic vectors is 1800

d.) None of above.

Directional coupler is a function of-

a.) Two port wave-guide

b.) Four port wove guide

c. )Single port wave-guide

d.) Size port wave-guide.

Isolators are used to couple generator and load because –

a.) It increases power of signal

b.) To match any load with generator

c. )To get phase shifted o/p

d.) To differentiate load & generator

In travelling wave tube for getting amplified output -

a. )Electron beam travels and RF field remains stationary

b.) Both electron beam and RF field travels in same direction

c. )Both electron beam and RF field remains stationary

d.) RF field travels and electron beam remains stationary

Crystal diode works on principle of –

a. )Negative resistance

b. )Positive resistance

c. )Square low

d.) Linear impedance

In gunn effect oscillator which mode having lowest operating frequency –

a. )Domain mode

b. )Delayed domain mode

c. )Quenched domain mode

d. )LSA mode

In Reflex klystron maximum energy transferred to gap by electrons-

a. )eR

b. )ee

c. )el

d. )eR , ee, el

The radio waves get absorbed by atmosphere depends –

a.) Their distance from transmitter is long

b.) Wave power is weak

c. )Improper polarization of wave

d.) Frequency of waves

8085 mP has no of sets of communication lines-

a. )2

b.) 3

c.) 4

d. ) None

No. of o/p ports in peripheral mopped I/p are up to-

a.) 32

b.) 64

c. ) 128

d.) 256

Is two byte instruction-

a.) MOV A, B

b.) ANA B

c.) MV I B, 92 H

d.) LHLD 2050 H

Banch instructions-

a. ) only uses flogs setting to make decision.

b. )only sets flogs according to results.

c. ) uses flogs settings as well as sets flogs setting

d. )nighteruse flog settings not set flogs.

What will be the time delay achieved from following loop-

Loop DCX B 6

MOV A, C, 4

ORA B 4

JNZ Loop 10

system clock freg. = 2 MHz.

a. ) 10 m s

b.)12 m s

c.) 14 m s

d. )16 m s

After execution of pop statement-

a. ) Stack pointer decremented by 2

b.) Stack pointer incremented by 2

c.) Stack pointer decremented by 1

d. )Stack pointer incremented by 1

Labels are used as an alternative for-

a.) Data

b.) Register name

c.) Memory address

d) Stack pointer

Microprogramming is a technique-

a) For programming the microprocessor

b.) For writing small programs efficiently

c. )For programming the control steps of computer

d.) For programming o/p / i/p

00110010 – 01000101 =?

a.) 00010011

b. )11101101

c. )11100011

d. )11100100

When an array is possed as an argument to a function what exactly gets possed-

a.) Address of the array

b. )Values of elements of array

c.) Number of elements of array

d. )Address of the first element of the array

A write cycle time means-

a.) Minimum length of write pulse

b.) Minimum amount of time for which data must be valid before write pulse end

c.) Minimum time required between successive write operation

d.) Minimum time for which data must be valid after write pulse ends

If three i/p of a gate are 1, 0, 1 then output is O the gate must be-

a.) NOT

b.) AND

c.) OR

d. )NAND.

Inverting amplifier configuration using operational amplifier is –









Which logic family is most faster-

a.) ECL

b.) DCTL

c.) RTL

d) TTL

For getting positive o/p from two i/p OR gate for positive logic-

a.) both i/p must be positive

b.) both i/p must be negative

c.) any one of i/p must be positive

d.) undefined condition

Supercilious is –

a. )Harighty

b.) High brow

c.) Angry

d.) Inane.

Give the synonym of 'moribund'-

a.) Undertaking

b.) Burial

c.) Leather bound

d.) Dying

The convention was to end on May 13 with a month long break in between. What do the two prepositions indicate?

a.) Duration

b.) Time

c) Direction

d.) Position

According to the writer what influences our dreams-

a. )inner censorships

b.) the stories

c. )the tales

d) none.

Vaunted is –

a.) Unvanquished

b.) Fell.

c.)Belittled

d.) Exacting.

The sun rays falls vertically on -

a.) Tropics

b.) Doldrums

c.) Poles

d.) Equator

Trimurti is associated with -

a.) Ellora

b.) Ajanta

c.) Khajuraho

d.) Elephant caves

n which year did the congress adopt “Poorna Swaraj” or complete independence as its goal?

a.) 1930

b.) 1929

c.) 1928

d.) 1942

Director of CBI-

a.) D.C Sharma

b.) A. M Shrivastava

c.) P.C Sharma

d.) P.C Dole

Rajiv Gandhi khel Ratna award for the year 2001 goes to -

a.) P. gopichand

b.) P. T Usha

c.) Sachin Tendulkar

d.) Gurpreet Singh

During which time is vist to Mecca treated as Haj?

a.) Id-Ul-Fitr

b) Id-ul-Zuha

c. )Milad-un-Nabi

d.) Any time

Of the 109 known metals, how many occur in nature and how many are produced synthetically in particle accelerators!

a.) 79 and 10

b.) 80 and 29

c. )95 and 14

d.) None can be produced synthetically

Earth’s average speed per second around the sun is -

a.) 30 km

b. ) 32 km

c.) 34 km

d.) 35 km

Governor of Reserve Bank of India is -

a.) Bimal Jalan

b.) C. Ranga Rajan

c. )Rana Malhotra

d. )S. Venkata Ramanan

The first pope to enter a mosque in Damascus syria is -

a )Pope John Paul II

b.) Pope John Paul I

c.) Pope John Paul III

d. )Pope John Paul V

Uranium is found in the state of -

a.) Orissa

b.) A. P

c.) Karnataka

d. )Bihar

Nuclear Power plant in Pakistan is located at-

a. )Karachi

b.) Peshawar

c. )Ellipse

d.) Paraboloid

BSNL GE-JTO Recruitment Examination

BSNL GE-JTO Recruitment Examination


Test Paper - VII


At a frequency below the resonant frequency parallel circuit is -

a) Inductive

b) Capacitive

c) Resistive

d) None

Which of the following are piezo-electric substances-

a) Barium titanate

b) Lead titanate

c) Lead zirconate

d) All the above

The resolution of a logic analyser is -

a) The maximum number of input channels

b) The minimum duration of the glitch it can capture

c) The internal clock period

d) The minimum amplitude of input signal it can display

In a P-type semiconductor, the conductivity due to holes (=sp) is equal to (e=charge of hole, mp = hole mobility, P = hole concentration)-

a)

b)

c) P.e. mp

d)

When a small amount of Cu is added to a Ni conductor, then the –

a) Resistivity of Ni will decrease at all temperatures because Cu is better conductor than Ni

b) Residual resistivity of Ni at low temperatures will increase as Cu atoms acts as defect centers

c) Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects

d) Resistivity of Ni remains unaltered as Cu atoms give the same numbers of free electrons as Ni atoms

A coil would behave as -

a) An inductor at high frequencies

b) A capacitor at very low frequencies

c) A capacitor at very high frequencies

d) A resonator at high frequencies

The law that induced emf and current always oppose the cause producing them was discovered by -

a) Maxwell

b) Faraday

c) Lenz

d) Fleming

A 'trimmer' capacitor is a variable capacitor used for -

a) 'Tunning up' a radio for best sensitivity

b) Tunning a radio to different stations

c) Changing the original capacitance by several hundred Pico farads

d) Eliminating whistling in a transistor radio

In panel wiring, solid wire is preferred to standard wire because it -

a) Can carry more current

b) Can be shaped better

c) Uses less chopper

d) Has better insulation

FET's have similar properties to –

a) PNP transistors

b) NPN transistors

c) Thermionic valves

d) Unijunction transistors

The semiconductor strain gauge has gauge factor -

a) 2

b) 10

c) 100

d) 1000

AE 139 is a-

a) Tunnel diode

b) Germanium power transistor

c) Photoconductive cell

d) Silicon diode

When a zener diode is used in a power supply its function is to maintain a constant -

a) Output voltage

b) Input voltage

c) Output current irrespective of the load resistance

d) supply current

The value of g for a transistor in saturation is -

a) 0

b) 0.5

c) very near unity

d) 0.25

A DE MOSFET differs from a JFET in the sense that it has no –

a) channel

b) gate

c) P-N junction

d) substrate

The gating pulse is removed after firing an SCR than the current in the SCR will –

a) Remain the same

b) Immediately fall to zero

c) Rise up

d) Rise a little and then fall to zero

In the fabrication of an integrated circuit, the advantages of ion implantation over diffusion doping are that –

a) Point imperfections are not produced

b) Shallow doping is not possible

c) It is a low temperature process

d) Previous steps in fabrication are affected

The alternate mode of a dual trace oscilloscope can be used for displaying –

a) Any two waveforms

b) Two waveforms of relatively high frequency

c) Two waveforms of relatively low frequency

d) One low frequency and one high frequency waveform

Attenuator is a –

a) pure resistance network producing a constant attenuation

b) pure resistance network producing a variable attenuation at variable frequencies

c) pure resistance producing a constant attenuation at all frequencies

d) pure resistance producing a constant attenuation at low frequencies

The equivalent circuit of the following circuit is –







For the lattice type attenuator shown in the given figure, the characteristic impedance R is –











Thevenin's equivalent circuit of the network shown in the given figure, between terminals T1 and T2 is –











One of the following combinations of open circuit voltage and Thevenins equivalent resistance which represents the Thevenins equivalent of the circuit shown in the given fig. is –



a) 1V, 10W

b) 1V, 1kW

c) 1mV, 1kW

d) 1mV, 10W

In the following circuit, the effective resistance faced by the voltage source is –



a) 1W

b) 2W

c) 3W

d) 3.3W

The equivalent circuit of a resistor is shown in the given fig. The resistor will be non-inductive if –











One of the following which is a cut set of the graph shown in fig. is –



a) 1, 2, 3 and 4

b) 2, 3, 4 and 6

c) 1, 4, 5 and 6

d) 1, 3, 4 and 5

For which value of R the following circuit will deliver maximum to the terminals a and b is –











In a coaxial cable, braided copper is used as a -

a) Conductor

b) Shield

c) Dielectric

d) Jacket

When the transmission loss for a 3 GHz microwave system over a certain distance is 130 dB and if the frequency is now doubled then the transmission loss will be –

a) 136 dB

b) 133 dB

c) 127 dB

d) 139 dB

When two equal positive point charges are placed along X- axis at X1 and –X1 respectively then the electric field vector at a point P on the positive Y-axis will be directed -

a) In the +x direction

b) In the –x direction

c) In the +y direction

d) In the –y direction

With reference to the given figure, the signal picked up by the receiving antenna can be increased by increasing-



a) he only

b) hr only

c) both he and hr

d) neither he nor hr

Which of the following antennas are frequency independent ?

1. Folded dipole

2. Half wave dipole

3. Parabolic reflector

4. Helical antenna

a) 2 and 4

b) 3 and 4

c) 1,3 and 4

d) 1,2 and 3

The reading of digital multimeter are –

a) very difficult

b) confusing

c) convenient

d) none

One of the following which does not have the same units as the others –










Shaft encoder is used for the measurement of –

a) angular position

b) linear position

c) linear velocity

d) linear acceleration.

The materials used in switches, brushes and relays for electrical contact must possess –

a) high thermal conductivity and high melting point.

b) low thermal conductivity and low melting point.

c) high thermal conductivity and low melting point.

d) low thermal conductivity and high melting point.

Capacitive transducer is superior to inductive type for the measurement of displacement because of –

a) absence of non-linearity

b) high frequency response

c) small size

d) high accuracy

When a RLC series circuit has R=1ohm, L=1H and C = 1F then the damping ratio on the circuit will be-

a) more than unity

b) unity

c) 0.5

d) zero

The sensitivity of an electromagnetic digital flow meter can be increased by increasing –

a) the circumferential width of rotor teeth

b) the radial depth of rotor teeth

c) the thickness of rotor teeth

d) the number of teeth

A moving iron instrument –

a) is an unpolarised meter

b) has not a fixed coil

c) both a and b

d) none

A linear displacement transducer of the digital type generally uses –

a) straight binary code

b) BCD

c) Gray code

d) hexadecimal code

The output open circuit voltage divided by the input current for a two port reciprocal network is equal to-

a) B

b) Z12

c) 1/y12

d) h12

The ac bridge shown in the given figure if balanced is Z1 = 100 Ð300 Z2 = 150Ð00, Z3 = 250 Ð 400 and Z4 is equal to –



a) 375Ð700

b) 375Ð-700

c) 150Ð00

d) 150 Ð200

The given figure represents the variation of electric field E –



a) Due to a spherical volume charge Q = Q1 + Q2

b) Due to two concentric shells of charge Q1 and Q2 uniformly distributed over spheres of radii R1 and R2

c) Due to two point charges Q1 and Q2 located at any two points 'r'

d) In a single spherical shell of charges Q uniformly distributed Q = Q1 + Q2

In a SCR anode current flows over a narrow regain near the gate during-

a) delay time tr

b) rise time tr and spread time to

c) td and t0

d) td and tr

For a 3-phase six-pulse diode rectifier, the average output voltage in terms of maximum value of line voltage Vm is











In an inverter with fundamental ouctput frequency of 50 Hz, if third harmonic is eliminated, then frequencies of other components in the output voltage wave in Hz would be-

a) 250, 350, 450, high frequencies

b) 50, 250, 350, 450

c) 50, 250, 350, 550

d) 50, 100, 200, 250.



Number of SCRs in a 3 phase full converter working during overlap is-

a) 1 from positive group 1 from negative group

b) 2 from positive group 1 from negative group

c) 1 from positive group 2 from negative group

d) 2 from positive group 2 from negative group



For a 3 phase bridge inverter in 1800 conduction mode. In the given fig the sequence of SCR conduction in the first two steps beginning with the initiation of thyristor is-



a) 6, 1, 2, and 2, 3, 1

b) 2,3,1 and 3,4,5

c) 3,4,5 and 5,6,1

d) 5,6,1 and 6,1,2

For the lattice type atten uator shown in the given figure, the characteristic impedance Rv is-











The plate efficiency of a class C amplifier is high because-

a) A resonant circuit is used as load)

b)The plate current flows when the instantaneous plate voltage is low.

c) The plate current flows only when grid is driven positive.

d)None of the above.



The low impedance of a dynamic loud speaker is a result of -

a) a large field magnet

b) the few turns of the voice coil

c) a large paper cone with big loud speakers

d) None of the above



The value of ICBO in a silicon transistor of b = 49 is 20 na) The value of ICEO for a temperature rise of 180 C would be-

a) 8mA

b) 160 nA

c) 1 mA

d) 7.84 mA



A certain percentage of negative feedback does not yield a fixed reduction in gain because it depends on-

a) Transistor configuration

b) Ambient temperature

c) Initial value of gain

d) Leakage current of the transistor



Crossover distortion occurs in --- amplifiers-

a) Push pull

b) Class A

c) Class B

d) Class AB



The power gain of an amplifier is 80 db) The half power frequency f1 and f2 are the frequency where gain has fallen to ---dB-

a) 40

b) 77

c) 0

d) 80/Ö2



In the given fig the overall voltage gain in the amplifier is -



a) Zero

b) 1

c) 1000

d) 100000

A two stage amplifier is required to have an upper cut off frequency of 2MHz and a lower cut off frequency 30Hz. The upper and lower cut off frequencies of individual stage are approximately-

a) 4MHz, 60Hz

b) 3MHz, 20Hz

c) 3MHz, 60Hz

d) 4MHz, 20Hz

Number of possible states in a circuit with n- FLIPFLOPS is-

a) Nn

b) 3n

c) 10n

d) 2n

In a digital voltmeter the largest number that can be read is –

a) 0999

b) 1999

c) 2999

d) 9999

The complement of the Boolean expression is-









The binary division 110002 ¸ 1002 gives –

a) 110

b) 1100

c) 11

d) 101

Time required by TTL circuit to switch from 0 to 1 or 1 to 0 is about –

a) 10 ms

b) 10 ns

c) 100 ms

d) 50 ns

Identify the wrong statement ?

a) 111002 – 100012 = 001012

b) 15E16 = 35010

c) 8110 = 1010012

d) 37.48 = 111 111.100

Type of radar used to eliminate clutter in navigational application is –

a) Monopulse radar

b) MTl radar

c) Tracking radar

d) pulse radar

Asynchronous sequential circuits are seldom designed to operate in the pulse mode because –

a) the amplitude of input pulses in a pulse mode is very critical

b) the duralion of the input pulses in a pulse mode is very critical

c) fundamental mode asynchronous circuit is cheaper than pulse mode asynchronous circuit

d) fundamental mode asynchronous circuit has a higher speed of operation than the pulse mode asynchronous circuit.

Identity the transferred electron device-

a) BARITT diode

b) IMPATT diode

c) Gunn diode

d) Step recovery diode



In a closed loop system the loop transfer function is given by



The angle of departure of the root locus at S = -1+ J is-

a) Zero

b) 900

c) -900

d) -1800

The transfer function of a plant is



For a step input it is required that the response settles to within 2% of its final value. The plant setting time is –

a) 20 sec

b) 40 sec

c) 35 sec

d) 45 sec



The transfer function and states in a linear feedback system shown in given fig. are respectively –





a) strictly stable and not stable

b) strictly stable and stable

c) not strictly stable and stable

d) not stable and not stable.

What is the steady state-error corresponding to a unit step input if the magnitude plot for a transfer function is shown in figure













Mark the correct effect in respect of addition of a pole to the system loop transfer function?

1. The root locus is pulled to the right.

2. The system response becomes slower.

3. The steady state error increases.

of these statements-

a) 1 and 2 are correct

b) 1, 2 and 3 are correct

c) 2 and 3 are correct

d) 1 and 3 are correct

In a feedback control system the polar plot of the open-loop transfer function intersects the real axis at - 2. The gain margin of the system is -

a) –5 dB

b) 0 dB

c) 6 dB

d) 40 dB

The unity feedback system for K is



the imaginary axis is-

a) 2

b) 4

c) 6

d) 48

The constant M loci plot is symmetrical width respect to-

a) real axis and imaginary axis

b) M =1 straight line and the real axis

c) M =1 straight line and the imaginary axis

d) M = 1 straight line and the imaginary axis

Identify the wrong statement-

a) Attenuation of satellite signals gain and varies almost inversely with the angle of elevation.

b) At present4/6 GHz Geostationary satellites are being parked in Geosynchronous orbits at least 100 apart.

c) The distance between satellite and earth station varies slightly with angle of elevation.

d) The angle of elevation depends on latitude of the earth station and the difference in longitude between earth station and the satellite.

The Voltage Vo of the given circuit is-



a) 5V

b) 3.1 V

c) 2.5 V

d) Zero



78. An antenna has 40 antenna resistance and 60W radiation resistances. The efficiency of the antenna is -

a) 30%

b) 40%

c) 50%

d) 60%



79. The blind speed of an MTl radar can be avoided by changing the-

a) Carrier frequency

b) Pulse repetition frequency

c) Antenna rotation rate

d) Transmitted power



Interlacing used in television is for-

a) produce the illusion of motion.

b) ensures that all the lines on the screen are scanned, not merely the alternate ones.

c) simplify the vertical sync pulse train

d) avoid flicker



The best system for accurate tracking if the target cross section is changing is-

a) lobe switching

b) sequential lobing

c) conical scanning

d) monopulse



In a single stage differential amplifier, the output effect voltage is basically dependent on the mismatch of-

a) VBE, IB and b

b) VBE and IB

c) IB and b

d) VBE and b



Antenna elevation angle at the ground station for satellite communication is always kept above 50 to-

a) Minimise the sky noise temperature

b) Reduce the effect of oxygen and water vapor absorption on the antenna noise temperature

c) Minimise the slant range

d) Increase the visibility of the satellite



In Hybrid wave-

a) Both electric and magnetic fields are purely transverse to direction of propagation of wave

b) Only electric field is purely transverse to direction of propagation of wave

c) Only magnetic field is purely transverse to direction of propagation of wave

d) Neither electric nor magnetic fields are transverse to direction of propagation of the wave



Balometer technique is used to measure –

a) Frequency

b) Low power

c) Attenuation

d) Phase shift



In fast switching circuits we use –

a) Klystron tube

b) Tunnel diode

c) Magnetron tube

d) PIN diode



PIN diode is used as –

a) Low noise mixer

b) Microwave detector

c) Balance mixer

d) Phase shifter



A periodic fluctuation of current passing through n type GaAS specimen when applied voltage exceeds critical value-

a) Gauss’s law

b) Faraday’s law

c) GUNN effect

d) Doppler effect



LOS distance can be increased by –

a) Increasing height of transmitting antenna

b) Increasing height of receiving antenna

c) Increasing height of bath

d) LOS distance can not be increased



Which fading produces serious distortion of modulated signal-

a) Selective

b) Polorisation

c) Interference

d) Slow fading



8085 mP is a processor of -

a) 8 bit

b) 10 bit

c) 32 bit

d) None



The Bit position of AC flog in flog register is-

a) D2

b) D4

c) D6

d) D7



In which arithmatic operation CY flog do not affect even if result is larger than 8 bit-

a) INR B

b) ADD A, B

c) SUB A, B

d) None

A stock means-

a) an 8 bit register in microprocessor

b) a 16 bit memory address in memory

c) a 16 bit register in microprocessor.

d) a set of memory location in memory reserved for storing information temporarily.

RIM instruction-

a) checks pending interupts

b) sets the interupt mask

c) resets the RST interupt

d) none of above

A signal generated by microprocessor to provide timing of various operation is transmited through-

a) address bus.

b) data bus

c) control bus

d) in buit signal no need to transmit

On execution of RAL-

a) Each bit is shifted right to the adjacent position bit Do becomes Dy

b) Each bit is shifted right to adjacent position bit Do becomes the carry bit and carry bit is shifted into DT

c) Each bit is shifted to adjacent left position. Bit DT becomes Do

d) Each bit is shifted to the adjacent left postion. Bit DT becomes the carry bit and the carry bit is shifted into Do

A frequency divider can be designed with help of-

a) Monostable

b) Bistable

c) Astable

d) Quasistable

The not allowed condition for NAND gate SR FF is-

a) S = 0 R = 0

b) S = 0 R = 1

c) S = 1 R = 0

d) S = 1 R = 1

In IC resistors are formed from p-type semiconductor are –

a) thin film

b) thick film

c) hybrid

d) monolithic

Give the tense of the following sentence-

He walked to the garden.

a) Present

b) Past

c) Future

d) None

You may go there if you want to. Here, the modal auxiliary 'may' indicates-

a) obligation

b) politeness

c) possibility

d) request

What type of a sentence is this?

His findings were imroved and built apon.

a) Simple

b) Comound

c) Complex

d) None of the above

1The manager is usually strict but in Madhav's case he decided to be-

a) direct

b) fair

c) excused

d) lenient

Find the word which is wrongly spelt-

a) possession

b) ocassion

c) profession

d) procession

“Dow Jones” is -

a) Name of the national museum in London

b) Bridge over River Thames

c) New York Stock Index

d) New Olympic champion in cycling

The term “Ashes” is associated with-

a) Hockey

b) Cricket

c) soccer

d) None of these

“Kathakali” dance is connected with-

a) Kerala

b) Rajasthan

c) Uttar Predesh

d) Tamil nadu

Among the following Miss India Universe 2001 is-

a) Ms Sara corner

b) Ms Maheshwari Thiagarajan

c) Ms Celina Jetley

d) None of the these

Maharashtra Bhusan Award for the year 2000 – 2001 by the state government goes to -

a) Sanjay Manjrekar

b) Vinod Kambli

c) Sachin Tendulkar

d) Praveen Sharma

Who was Sworn in as the chief Justice of India-

a) Mr. S. Krishnaswamy

b) Mr.A.K. Mehra

c) Mr. J.K. Naidu

d) Mr. S.P. Bharucha

Which one of the following tennis competitions is not included in GRAND SLAM?

a) Wimbeldon

b) U.S open

c) French open

d) Australian open

The first Korean to win the Japan open badminton tournament is -

a) Lee Hyun – II

b) Marleen Renders

c) Shang Pee

d) Emma Yan

India launched first satellite by the name-

a) Bhaskara

b) Aryabhatt

c) INSAT

d) APPLE

. Which state in India is called the “garden of spices”?

a) Karnataka

b) Kerala

c) Assam

d) Tamil Nadu

. The new CEO and the president of the Infosys Technology is –

a) N. R. Narayan Murth

b) Nandan Nilekani

c) SD Shibulal

d) M. Subbarao

The President of India can nominate to the Rajya Sabh-

a) 6 members

b) 9 members

c) 12 members

d) 15 members

King of Nepal is-

a) Prince Gyanendra

b) Prince Dipendra

c) Prince Birendra

d) Prince Devendra

The famous paper which gandhigi edited to propagate his ideas-

a) Khadi

b) Swadeshi

c) Harijan

d) Satyagraha

The length of the pitch in the cricket is-

a) 22 meters

b) 25 yards

c) 50 feet

d) 22 yards

BSNL GE-JTO Recruitment Examination

BSNL GE-JTO Recruitment Examination


Test Paper - IX



When a piece of copper and another of germanium are cooled from room temperature to 800 K then the

resistance of -

a) Each of them increases

b) Each of them decreases

c) Copper increases and germanium decreases

d) Copper decreases and germanium increases

When a signal of 10 mV at 75 MHz is to be measured then which of the following instrument can be used -

a) VTVM

b) Cathode ray oscilloscope

c) Moving iron voltmeter

d) Digital multimeter

When a sample of germanium and silicon having same impurity density are kept at room temperature then –

a) Both will have equal value of resistivity

b) Both will have equal value negative resistivity

c) Resistivity of germanium will be higher than that of silicon

d) Resistivity of silicon will be higher than that of germanium

When an RC driving point impedance function has zeros at s= -2 and s=-5 then the admissible poles for the function would be –

a) s = 0; s = -6

b) s = 0; s = -3

c) s = 0; s = -1

d) s = -3; s = -4

5. For the n-type semiconductor with n = Np and p = , the hole concentration will fall below the intrinsic value because some of the holes –

a) drop back to acceptor impurity states

b) drop to donor impurity states

c) Virtually leave the crystal

d) recombine with the electrons

The location of lighting arrestor is –

a) Near the transformer

b) Near the circuit breaker

c) Away from the transformer

d) None

Time constant of an RC circuit increases if the value of the resistance is –

a) Increased

b) Decreased

c) Neither a nor b

d) Both a and b

Telemetering is a method of –

a) Counting pulses sent over long distances

b) Transmitting pictures from one place to another

c) Transmitting information concerning a process over a distance

d) None

When the gauge factor of a strain gauge is 2, stress is 1050 kg/cm2, Y = 2.1´ 106 kg/cm2 and R is

100 ohms then the value of DR will be –

a) 2W

b) 3W

c) 4W

d) 1W

As the drain voltage is increased for a junction FET in the pinch off region then the drain current –

a) Becomes zero

b) Abruptly decreases

c) Abruptly increases

d) Remains constant

11. One of the following, which is not a transducer in the true sense, is –

a) Thermocouple

b) Piezoelectric pick up

c) Photo-Voltaic cell

d) LCD

When a transistor is required to match a 100W signal source with a high impedance output circuit then the connection that would be used is –

a) Common base

b) Common collector

c) Common emitter

d) Emitter follower

In a JFET gates are always –

a) forward biased

b) reverse biased

c) unbiased

d) none

The main factor which differentiate a DE MOSFET from an E only MOSFET is the absence of –

a) insulated gate

b) electrons

c) channel

d) P-N junction

An SCR conducts appreciable current when –

a) Anode and gate are both negative with respect to cathode

b) Anode and gate are both positive with respect to cathode

c) Anode is negative and gate is positive with respect to cathode

d) Gate is negative and anode is positive with respect to cathode

Silicon is not suitable for fabrication of light emitting diodes because it is -

a) An indirect band gap semiconductor

b) A direct band gap semiconductor

c) A wide band gap semiconductor

d) A narrow band gap semiconductor

An average responding rectifier type electronic ac voltmeter has its scale calibrated in terms of the rms value of a sine wave, when a square wave voltage of peak magnitude 100V is measured using this voltmeter then the reading indicated by the meter, will be –

a) 111V

b) 100V

c) 90.09V

d) 70.7V

When a four terminal T network is inserted between a source and load resistance as shown in figure then the resistance seen by the source remain the same with or without the four terminal block when R is –



a) 5W

b) 10 W

c) 15 W

d) 20 W

19. In the ac bridge shown in the given figure, the value of Rx and Cx at balance will be –











Which one of the following conditions for Z parameters would hold for a two port network containing linear bilateral passive circuit elements –

a) Z11 = Z22

b) Z12Z21 = Z11Z22

c) Z11Z12 = Z22Z21

d) Z12 = Z21

When the transmission parameters of the following network are A = C = 1, B = 2 and D = 3 then the value of Zin is –







c) 3W

d) 4W

The value of G12 or for the circuit shown in the fig. is –











The two port network of the fig. shown has open circuit impedance parameters given by matrix –











In the circuit shown, the switch closes at t = 0. The voltage across 4mF capacitor in ideal condition changes to –



a) 0

b) 16V

c) 15V

d) 24V



While calculating Rth, constant current sources in the circuit are –

a) replaced by opens

b) replaced by 'shorts'

c) treated in parallel with other voltage sources

d) converted into equivalent voltage sources

Maxwell's loop current method of solving electrical networks –

a) uses branch currents

b) utilizes kirchhoff's voltage law

c) is confined to single-loop circuits

d) is a network reduction method

A transmission line of characteristic impedance Z0 = 50 ohms, phase velocity Vp = 2 x 108 m/s and length l = 1m is terminated by a load ZL= ( 30 – j 40 ) ohms. The input impedance of the line for a frequency of 100 MHz will be

a)(30 + j40 ) ohms

b)( 30 – j40 ) ohms

c)(50 + j40 ) ohms

d)(50 – j40 ) ohms

For an elliptically polarized wave incident on the interface of a dielectric at the Brewster angle then the reflected wave will be-

a) Elliptically polarized

b) Linearly polarized

c) Right circularly polarized

d) Left circularly polarized

A yagi antenna has a driven antenna-

a) Only

b) With a reflector

c) With one or more directors

d) With a reflector and one or more directors

The number of lobes on each side of a 3l resonant antenna is –

a) 3

b) 6

c) 2

d) 1

The electric field intensity of a Hertizian dipole at a remote point varies as-









Radiation resistance of a half wave folded dipole is -

a) 72 W

b) 144W

c) 288 W

d) 216W

When a carrier wave is modulated at 100% it’s power is increased by -

a)100%

b)150 %

c)50%

d)0%

On a clear sky day, the atmospheric radio noise is strongest -

a) During morning hours

b) Around mid-day

c) During nights

d) In the afternoon

TV broadcasting system in India is as per CCIR -

a) System B

b) System I

c) System M

d) System X

For the safety measurement of the internal resistance of a 25-0-25 mA meter, a laboratory multimeter whose sensitivity is equal to –

a) 1k ohm/volt can be used

b) 10 k ohm/volt can be used

c) 100 k ohm/volt can be used

d) 200 k ohm/volt can be used

In order to measure moisture in wood the most suitable method is –

a) Electrical conduction

b) Electrical – capacitive

c) Absorption of radiation

d) Equilirium- moisture vs humidity



The flow rate of elctrically conducting liquid without any suspended practicle cannot be measured by –

a) turbine flow meters

b) electromagnetic flow meters

c) ultrasonic flow meters

d) thermistor based heat loss flow meters



The most useful transducer for displacement sensing with excellent sensitivity, linearity and resolution is –

a) an incremental encoder

b) an abosolute encoder

c) LVDT

d) a strain gauge



When variable reluctance type techometer has 150 teeth on the rotor & the counter records 13,500 pulses per second then the rotational speed will be–

a) 4800 rpm

b) 5400 rpm

c) 6000 rpm

d) 7200 rpm.

41. On a voltage scale, zero dB m in a 600-ohm system could refer to –

a) 1.732 V

b) 1.0 V

c) 0.7746 V

d) 0.5V

One of the following devices which is required in addition in order to measure pressure using LVDT is-

a) strain gauge

b) pitot tube

c) Bourden tube

d) Rotameter

It is required to measure temperature in the range of 13000 C to 15000 c) The most suitable thermocouple to be used as a transducer would be –

a) chromel - constantan

b) Iron - constantan

c) chromel - alumel

d) platinum- rhodium

In a CSI if frequency of output voltage is f Hz, then frequency of input voltage to CSI is-

a) f

b) 2 f

c) f/2

d) 3 f

Identify the type of chipper in the given circuit



a) Type A chopper

b) Type B chopper

c) Type C chopper

d) Type D chopper

Maximum value of charging resistance in an UJT is associated with-

a) peak point

b) valley point

c) any point between peak and valley

d) after the valley point

Thyristor A has rated gate current of 2A and thyristor B a rated gate current of 100 mA-

a) A is a GTO and B is a conventional SCR

b) B is a GTO and A is a conventional SCR

c) B may operate as a transistor

d) none of the above

In a 3 phase full converter, the output voltage during overlap is equal to-

a) zero

b) source voltage

c) source voltage minus the inductance drop

d) average value of the conducting phase voltages

Mark old the correct statement for Cycloconverters-

a) step-down Cycloconverter (CC) works on natural commutation

b) step up CC requires no forced commutation

c) load commutated CC works on line commutation

d) none of the above

In a 3 phase full converter if load current is I and ripple free, then average thyristor current is-

a)

b)

c)

d)

In the RF amplifier stage cascade (CE-CB) amplifier is used because it gives-

a) Large voltage gain

b) Low output impedance

c) Large isolation between the input and the output

d) None of the above

Silicon diode is less suited for low voltage rectifier operation because-

a) it can withstand high temperature

b) ensures low PIV of the diodes

c) ensures lower values of capacitance in the filter

d) reduces ripple content

An amplifier of class A is that in which -

a) Base is biased to cut – off

b) Ic flows most of the time

c) Ie flows all the time

d) Vc often raises to Vcc

A transistor is in active region when-

a) IB = bIC

b) IC=bIB

c) IC=IE

d) IC=IB

For coupling purposes in RF amplifier a buffer amplifier is used because it provides-

a) Maximum loading and minimum mismatch

b) Minimum loading and minimum mismatch

c) Maximum loading and maximum mismatch

d) Minimum loading and maximum mismatch

. A transistor has CE parameter as hie = 10kW, hre =20 x 10-4 , hse = 100, hoe = 25 ms. The hib for this transistor will be-

a) 100 W

b) 99.01 W

c) 5m W

d) 101kW

An FM radio receiver is tuned to a 90.6 MHz broadcast station. It will receive an image frequency of -

a) 110 MHz

b) 112 Hz

c) 114 MHz

d) 120 MHz

In the given fig RL is shorted out, then VCE will become-



a) OV

b) VCC – IBRB

c) Equal to VCC

d) None of the above

See the circuit shown and choose the correct option –



a) Only red will glow

b) Only green will glow

c) Both red and green will glow

d) Neither red nor green will glow

A dc to dc converter having an efficiency of 80% is delivering 16W to a load) If the converter is generating an output of 200V from an input source of 20V, then the current drawn from the source will be –

a) 0.1A

b) 0.5A

c) 1.0A

d) 10.0A

A transistor is operated as a non-saturated switch to eliminate –

a) storage time

b) turn – off time

c) turn – on time

d) delay time

. The output Y of the circuit in the given figure is –



a) (A + B)C + DE

b) AB + C(D + E)

c) (A + B)C + D + E

d) (AB + C) . DE

Rotors used in a two-phase ac servomotor is –

a) solid iron motor

b) squirrel cage rotor

c) drag cup rotor

d) both b and c

Major advantage of TWT over a klystron lies in its –

a) higher bandwidth

b) higher output

c) higher frequency

d) higher gain

The op-map circuit shown in the given figure can be used for –



a) addition

b) subtraction

c) both addition and subtraction

d) multiplication

The Boolean expression for the shaded area in the given Venn diagram is –











A lag compensator is basically a –

a) high pass filter

b) band pass filter

c) low pass filter

d) band elimination filter

Transfer function T (S) of the system in the given fig is-











The overall transfer function for a unity feedback system is



Mark the correct statement regarding this system

1. Position error constant kp for the system is 4

2. The system type one.

3. The velocity error constant kv for the system is finite.

Select the correct answer using the codes given below-

Codes

a) 1,2 and 3

b) 1 and 2

c) 2 and 3

d) 1 and 3



If the rotor’s resistance and reactance are respectively R and X1 its length and diameter are L and D for two phase a) c) servomotor, then-









In a PID controlles the transfer function G(s) is-









Transfer function can be approximated by the system-









The transfer function of an amplifier is given by



The high 3 db frequency of an amplifier will be approximately-

a) 5850 kHz

b) 585 kHz

c) 5850 Hz

d) 585 Hz

An open loop transfer function is given by



Its – loci will be-











. The output signals amplitudes for 1's and 0's in an ADM transmission systems are –

a) Fixed and the repetition rate is also fixed

b) Fixed but the repetition rate is variable

c) Variable and the repetition rate is also variable

d) Variable but the repetition rate is fixed

Microwave link repeaters are typically 50km apart –

a) Because of atmospheric attenuation

b) Because of Output tube power limitations

c) Because of the earth's curvature

d) To ensure that the applied ac voltage is not excessive

. The amplifier inserted at intervals to amplify the signal and compensate for transmission loss on the cable are called-

a) line amplifier

b) equalizing amplifiers

c) compradors

d) repeaters.

Diversity reception in used to-

a) increase receiver sensitivity

b) improve receiver selectivity

c) overcome degrading effect of fading

d) overcome degrading effect of receiver detuning

Mark out transferred electron device in the following-

a) BARITT dived

b) IMPATT dived

c) Gunn divde

d) Step recovery diode

In the output of a normal monochrome receiver video detector voltages, which are not found, are -

a) syne

b) video

c) sweep

d) sound

The HV anode supply for the picture tube of TV receiver is generated in the-

a) mains transformer

b) vertical output stage

c) horizontal output stage

d) horizontal deflection oscillator

In antenna measurements using two aperture antennas of dimensions D1 and D2 , minimum separation between the two should be (x is free space wavelength of radiation uses)









. The frquency range for satellite broad casting is –

a) 30 MHz – 300MHz

b) 30 MHz – 3 GHz

c) 3 GHz – 30 GHz

d) 30 GHz – 300 GHz

Iris is used to –

a) Over come power loss

b) Over come bending effect

c) Over come mismatch error

d) Over come twist effect

In schotty barrier diode current flows because of –

a) Majority carriers

b) Minority carriers

c) Majority and minority carriers

d) None

. Which antennas are used in microwave communication –

a) long wave antennas

b) Rhombic antennas

c) Parabolaidal antennas

d) All of above

Among translator & time of sight system capacity –

a) Of translator is more

b) Of line of sight is more

c) Having equal capacity

d) No relation such as

No of T-state required for memory read or write operation-

a) 2

b) 3

c) 4

d) 6



89. In data transfer operation which flag get affected)-

a) 3140 flog.

b) carry flog

c) sign flog.

d) none

In flowchart which figure represents process like subroutine-







.



The storage and retrieval of data on stacks should follow sequence-

a) last in first out

b) first in first out

c) random in random out

d) none



. While executing program microprocessor checks INTR line clearing-

a) each instruction

b) after interval of two instruction

c) after a subroutine

d) at the end of program.



93. In which error check technique of data communication 2's complement of all bytes of data is transmitted with data-

a) Even parity

b) odd parity

c) check scans

d) cyclic redundancy



. Program execution hierarchy decides which operator-

a) is most important

b) is used first

c) is fastest

d) operators on largest number

. (375)10 = (----)8

a) 550

b) 557

c) 567

d) 577

To obtain 2048 8 memory using 128 8 memory chip how many IC required-

a) 2

b) 4

c) 8

d) 16

A Decimal no. 17 can be converted in binary, the binary no. will be.-

a) 10001

b) 01110

c)00111

d) 11100

Is the Universal logic gate-

a) AND

b) OR

c) NAND

d) X-OR

A monostable state in multivibrator means-

a) which returns itself to its single stable state

b) the state used only once in circuit

c) the state of circuit can not get changed

d) the state of circuit always changing

For designing binary counter which flip flop is preferred -

a) T FF

b) SR FF

c) D FF

d) JKFF

His handwriting was not ----- so I could not read his note –

a) attractive

b) eligible

c) clear

d) legible

They started to ----- people into the theatre only at six -

a) enter

b) admit

c) follow

d) accept

I told him to buy things that are lasting (Give the appropriate synonym of the underlined word).

a) ending

b) ordinary

c) durable

d) cheap

Give the word which is most opposite in meaning of the word 'evident'-

a) doubtful

b) unimportant

c) disagreed

d) understood

I expressed by disagreement ------ him on that issue-

a) between

b) with

c) about

d) for

‘Sugarbowl’ of the world is -

a) India

b) Cuba

c) Brazil

d) USA

Palk strait separates-

a) India and Srilanka

b) India and Burma

c) Britain and France

d) Malaysia and Sumatra

The minimum number of atoms in a molecule of an element are-

a) 1

b) 5

c) 2

d) 10

Tides in the sea are caused by-

a) Effect of sun

b) Effect of moon

c) combined effect of moon and sun

d) Gravitational, centrifugal and centripetal forces

. The Bar council of India decided to close over law colleges across the country for their failure to maintain minimum teaching standard) There number is

a) 140

b) 200

c) 150

d) 100

Aswan Dam is located in-

a) Egypt

b) Libya

c) Sudan

d) Iran

Ghana Birds sanctuary is in the state of -

a) Rajasthan

b) Madhya Pradesh

c)Uttar Pradesh

d) Maharashtra

Dry ice is-

a) Frozen carbon monoxide

b) Frozen carbon dioxide

c) Frozen ammonia

d) None of these

East flower river of India is -

a) Cauvery

b) sone

c) Narmada

d) Tapti

The total length of the great wall of China is –

a) 1,400 miles

b) 1,500 miles

c) 1,300 miles

d) 1,400 miles

Deficiency of vitamin C may result in-

a) beriberi

b) night blindness

c) dermatitis

d) Scurvy

Bharat Shah a film financer was granted bail by Supreme Court after a period of –

a) 11 months

b) 2 years

c) 18 months

d) 15 months

Indian local time is based on-

a) 800 E longitude

b) E longitude

c) 1100 E longitude

d) 250 E longitude

The two days Shiv Shena Mahashivir of 2002 started at Shirdi on –

a) 9th April 2002

b) 10th April 2002

c) 8th April 2002

d) 11th April 2002

Which one is a good preservative of food?

a) Spirit

b) Formaldehyde

c) Sugar

d) None of the above