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Roll No. :EEID0200206

CandidateName :AAYUSH PATIDAR

ExamName : Electrical Engineer

Test Date :11/8/2015 3:28:00 PM

Test Time :3:30 PM

Center :INDORE02 (IPS Academy(CENTRE 2 - IES))

Correct Option selected Wrong Option selected or Not Answered Correct Option

Q.No: 1 Which is true statement ?

A A bistable multivibrator is a saw tooth wave generator

B A bistable multivibrator is a crystal oscillator

C A bistable multivibrator is a triggered oscillator

D A bistable multivibrator is a free-running oscillator

Q.No: 2 The system given as y(t)=x(t-8) is invertible then inverse system will beas-

A y(t+8)

B y(t-8)

C y(2t+8)

D y(t-2)

Q.No: 3 The enhancement type MOSFET is known as :

A Normally on MOSFET

B P-type MOSFET

C N-type MOSFET

D Normally off MOSFET

Q.No: 4 The material used for insulating in a cable should have the followingproperty :

A High dielectric strength

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B All options are correct

C High mechanical strength

D Low cost

Q.No: 5 Which diode works under forward-biased condition :

A Varactor diodeB Ligh t emitting diode

C Zener diode

D Photo diode

Q.No: 6 The nature of transconductance curve of a JFET is :

A Parabolic

B Straight lineC Hyperbolic

D Inverted V-type

Q.No: 7 The trigonometric Fourier series representation of an even signal does nothave the following type of functions-

A Odd harmonic functions

B Cosine functionsC Sine functions

D DC

Q.No: 8 The electrical torque in terms of supply voltage V in a 3-phase inductionmotor, is proportional to the following?

A V-1

B V

C V1/2

D V2

Q.No: 9 Gray code for number 4 is given by,

A 0100

B 0111

C 0110

D 0101


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Q.No: 10 Siemens can be used as a unit for-

A Measurement of resistance

B Measurement of flux density

C Measurement of conductance

D Measurement of electric field

Q.No: 11 The power spectral density and the autocorrelation function of anperiodic signal are related by -

A None of these is correct

B Both are same

C The Laplace transformation

D The Fourier transformation

Q.No: 12 Which transmission system has skin effect absence, less line cost, lowcorona effect?

A EHV-AC

B HVDC

C UHB-AC

D HVDC and EHV-AC

Q.No: 13 Frequency shift keying can be considered as a method for introducing:A None of these is correct

B Amplitude modulation

C Frequency modulation

D Phase modulation

Q.No: 14 The main disadvantage of CW Doppler radar is :

A It requires a transponder at the target

B It does not provide target range

C It does not provide the target position

D It does not provide the target velocity

Q.No: 15 Which statement is true :

A Reluctance motor can be considered as a variable torque motor

B Reluctance motor can be considered as a low noise and slow speed motor

C Reluctance motor can be considered as self starting type synchronousmotor

D Reluctance motor can be considered as low torque variable speed motor


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Q.No: 16 The equation is

A Fourier equation

B Maxwell’s equation

C Laplace’s equation

D Poisson’s equation

Q.No: 17 In order to separate the channels in an TDM receiver, we need to usefollowing :

A Band pass filters

B Differentiator

C Integrator

D And gates

Q.No: 18The transfer function of the following state model of an LTI system with

zero initial condition is

A

B

C

D

Q.No: 19 Which interrupt is unmaskable interrupt ?

A INTR B RST 7.5

C TRAP

D RST 5.5

Q.No: 20 The mathematical expression for the velocity for travellingelectromagnetic wave in free-space can be given as:

A

B

C

D


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Q.No: 21 If eight resistors of 8 Ohm resistance of each are connected in parallelthen the net resistance will be:

A 1

B 8

C 4D 64

Q.No: 22 The variable speed operation is desired for the following application :

A Ceiling fan

B Exhaust fan

C Water pump

D Refrigerator

Q.No: 23 The energy density corresponding to static magnetic field is as-

A H2

B H2

C 1/2 H 2

D (1/ ) (H2

)

Q.No: 24 In a microprocessor, the data bus has 16 lines and address bus has 12lines. What will be the number of bytes in the memory-

A 8k

B 2k

C 24k

D 4k

Q.No: 25

The circuit given below shows :

A An integrator


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B A clamper

C A differentiator

D A logarithmic amplifier

Q.No: 26 Laplace transform is not useful for analysis of the following controlsystems-

A Unstable continuous –time systems

B Linear systems

C Discrete- time systems

D Time- invariant systems

Q.No: 27 The following circuit is a sequential circuit :

A NAND gate

B Bistable multivibrator

C EX-OR gate

D AND gate

Q.No: 28 The core in optical fiber has following :

A Same refractive index like cladding

B More refractive index than the cladding

C Less refractive index than the cladding

D Less refractive index than the air

Q.No: 29 The following experession T = X Z + X + XYZ can be simplied as :

A T= Z+XY

B T = XZ+X

C T=X +XY

D T=X +X

Q.No: 30 Regenerative feedback means the following-

A Feedback with negative sign

B Feedback with step input

C Feedback with oscillations

D Feedback with positive sign

Q.No: 31 Laser light is:

A Stimulated emission


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B Spontaneous emission

C Coherent and stimulated emissions

D Coherent emission

Q.No: 32

What is the magnitude of the attractive force (in vacuum) between the

charge Q 1 =3x10-4

C at location (1,2,3) and the charge Q 2=-10-4

C atlocation (2,0,5) ?

A 30 N

B 40 N

C 120 N

D 60 N

Q.No: 33 The satellites used for the purpose of intercontinental communicationsare called as:

A Damsat

B Intelsat

C Comsat

D Marisat

Q.No: 34 If the state space representation of an LTI system is known then the

transfer function of this system-A None of these is correct

B Can be completely determined

C Cannot be completely determined

D Can be partially determined

Q.No: 35 The power spectral density of the stationary noise whose autocorrelationis R( )=e -3| | , will be-

A

B

C

D

Q.No: 36 Which statement is true :

A A clipper circuit may generate harmonics


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B A clipper circuit increases the RMS value of the signal

C A clipper circuit improves the power factor of the linear passive load

D A clipper circuit increases the load VA rating of the linear passive load

Q.No: 37Given that X and Y are two independent Gaussian random variables,each one has average value=0, and variance = , then the jointdensity function can be defined as :

A f(x,y) = f(x) -f (y)

B f(x,y) = f(x) f (y)

C f(x,y) = f(x) +f (y)

D f(x,y) = (f(x))/(f(y))

Q.No: 38 The following memory is a permanent memory

A ROM

B None of these is correct

C ROM AND RAM

D RAM

Q.No: 39In a first order passive low-pass fifteen (R-C) circuit, the input voltagesquare wave is fed. The output voltage, with respect to ground, ismeasured across :

A Capacitor

B Ground

C Supply

D Resister

Q.No: 40 Measurement of dielectric loss of capacitor can be performed by-

A Using Wein bridge

B Using Owen bridge

C Using Schering bridge

D Using Maxwell bridge

Q.No: 41 In an R-L series circuit, the ratio of inductive impedance to resistance is1/√3. The power factor of the A.C. circuit at steady state is:

A 0.5 lag

B 0.87 lead

C 0.5 lead

D 0.87 lag


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Q.No: 42 The input signal for the A.C. bridges is applied from-

A Oscillator system

B D.C. battery system

C Amplifier system

D Regulated power supply system

Q.No: 43 The unit step sequence u[n] and impulse response [n] are related as -

A

B

C

D

Q.No: 44 If unit step current is applied to an initially relaxed capacitor, then thevoltage across the capacitor will be-

A Unit step function

B Impulse function

C None of these is correct

D Ramp function

Q.No: 45

In the given circuit in the below Figure, the value of V will be as follows:

A 20

B 10

C 70

D 80

Q.No: 46 A cathode ray oscilloscope works based on the following -

A Electrostatic based focusing technique

B Electromagnetic based focusing technique


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C Electrostatic and Electromagnetic based focusing technique

D None of these is correct

Q.No: 47 The most heavily doped region of a transistor is :

A None of these is correct

B BaseC Emitter

D Collector

Q.No: 48 If the voltage gain |V 0 /V i | of an amplifier is 1/ , its value in dB is -

A -6.93 dB

B -3 dB

C +3 dBD +10 dB

Q.No: 49 The autocorrelation function of a real signal x(t) denoted by R x( )satisfies the following condition -

A R x ( ) = 1

B R x ( ) > R x (- )

C R x ( ) = R x (- )D R x (0) < R x (- )

Q.No: 50 The application of thermocouple transducer is

A Measurement of velocity and vibration

B Measurement of temperature

C Measurement of pressure

D Measurement of gas flow

Q.No: 51 The following relay is used for protection of motors against overload?

A Electromagnetic attraction type

B Buchholz relay

C Impedance relay

D Thermal relay

Q.No: 52 In television, we use interlacing for the following purpose:

A To ensure that all lines on the screen are scanned


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B To avoid flicker

C To provide the illusion of motion

D To simplify the vertical sync pulse train

Q.No: 53The divergence of electric flux density

at origin is

A 0

B 2

C 4

D -2

Q.No: 54 BJT is considered better than MOSFET when :

A There is a requirement of low power dissipationB There is a requirement of high noise margin


D There is a requirement of low cost

Q.No: 55 The internal resistance of the ammeter should be very low so that-

A It will provide minimum effect of the current in the circuit

B It will provide high accuracyC It will provide maximum voltage drop across the meter

D It will have high sensitivity

Q.No: 56 A varactor can be defined as-

A A diode which is used for high speed switching

B A diode which is used for variable resistor

C A diode which is used for variable capacitorD A diode which is used for variable inductor

Q.No: 57 In Intel 8085 microprocessor, the address bus is 16 bit wide. Thememory which can be accessed by this address bus will be-

A 12 k bytes

B 64 k bytes

C 8 k bytes

D 2 k bytes

Q.No: 58 Companding operation is useful because :


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A It reduces impulse noise in PWM receivers

B It protects small signals in PCM from quantizing noise


D It overcomes quantization noise in PCM

Q.No: 59 The value of of a BJT is :

A >1

B about 10 -5

C about 0.1

D about 10 -3

Q.No: 60 An ideal voltage amplifier has :A Input resistance = , Output resistance = 0

B Input resistance = 0, Output resistance =

C Input resistance = 0, Output resistance = 0

D Input resistance = , Output resistance =

Q.No: 61 The discrete-time system denoted by y[n]=x[n 3] is-

A Linear, time-varying and causal systemB Linear, time-invariant and non-causal system

C Linear, time-variant and non-causal system

D Nonlinear, time-varying and causal system

Q.No: 62 The time period of a square ware of frequency 1kHz is-

A 10 -3 s

B 0.1 s

C 1 s

D 10 s

Q.No: 63 The autocorrelation function of a signal at zero -lag will be :

A Mean value of signal

B Average power of signal

C Average voltage of signal

D Zero


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Q.No: 64 The power of a sinusoid signal x(t) = A/2 Cos( t) is given by -

A A2

B A2 /4

C A2 /8

D A2 /2

Q.No: 65 What number of nybbles can make one byte-

A 1

B 4

C 8

D 2

Q.No: 66 Which is not an Omni-directional antenna:A Log-periodic antenna

B Half-wave dipole antenna

C Marconi antenna

D Discone antenna

Q.No: 67 Which of the following statement is true ?

A Single-phase induction motor requires only one winding

B Single-phase induction motor can rotate in one direction only

C Single-phase induction motor is not self-starting

D Single-phase induction motor is self starting

Q.No: 68 The SI unit of electrostatic field strength is

A volt/meter

B volt 2 /meter

C volt/meter 2

D volt-meter

Q.No: 69 A waveguide can be treated as a :

A High pass filter

B Band stop filter

C Low pass filter

D Band pass filter


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Q.No: 70 In DSB-SC system, at the receiver the detection process is expensivebecause :

A All options are correct

B It requires synchronous detection

C Power level of received signal is very low

D Generation of local carrier is difficult at the receiver

Q.No: 71 Oil switches are applied :

A For low voltage circuits

B For high voltages and large current circuits

C For all circuits

D For low current circu its

Q.No: 72 Following is the magnitude of the impedance of the series RLC circuitrunning at angular frequency :

A

B

C

D

Q.No: 73 Which statement is not true ?

A Losses in optical fibers can caused by microbending

B Losses in optical fibers can caused by stepped index operation

C Losses in optical fibers can caused by impurities

D Losses in optical fibers can caused by attenuation in the glass

Q.No: 74 Which statement is not true :

A The phased array radar has the ability to track many targetssimultaneously as compared to other types of radar

B The phase array radar has very fast scanning compared to other types of radar

C The phase array radar has circuit simplicity compared to other types of radar

D The phase array radar has ability to track and scan simultaneouslycompared to other types of radar


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Q.No: 75 Which statement is true ?

A Hall effect can be used to measure electric field intensity

B Hall effect can be used to measure electric and magnetic field intensities

C Hall effect can be used to measure magnetic field intensity

D Hall effect can be used to measure carrier concentration

Q.No: 76 Poynting vector represents:

A power density vector which produces electromagnetic field

B current density vector which produces electromagnetic field

C power density vector which produces electrostatic field

D current density vector which produces electrostatic field

Q.No: 77 Which motor has series characteristics :A Capacitor start motor

B Shaded pole motor


D Repulsion motor

Q.No: 78Assume that F 1 and F 2 denote the lower and upper half powerfrequencies of a series RLC circuit respectively and F

0 denotes the

resonance frequency. The selectivity of this RLC circuit is given by-

A

B

C

D

Q.No: 79 If the length of a cable is doubled then its capacitance will be :

A One-half

B Remain unchanged

C One-fourth

D Double

Q.No: 80 The load curve is used for

Deciding schedule and sizes of the generating units and capacity of the


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A plant

B Deciding total installed capacity of the plant

C Deciding sizes of generating units

D Deciding schedule of generating units

Q.No: 81

In the given below circuit the current i(0 + ) and are given by:

A 5,0B 0,0

C 0,5

D 0,2

Q.No: 82 Which distortion is least significant for the audio amplifiers?

A Frequency

B IntermodulationC Phase

D Harmonic

Q.No: 83 The fuse rating is given in terms of the following :

A Voltage

B Current

C kVAD VAR

Q.No: 84 To charge a feeder cable the following sequence of operation is true :

A Make the isolator followed by make the switch gear

B Make the switch gear followed by make the isolator

C Break the isolator followed by make the switch gear

D Simultaneously make the isolator and switch gear

Q.No: 85 In a PCM system, the signal to quantization error ratio for 8-bit wordswill be :


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A 40 dB

B 30 dB

C 54 dB

D 64 dB

Q.No: 86 Entropy commonly measures :A The average informtion

B The loss of in formation

C The rate of information

D The probability of information

Q.No: 87 The impulse response of a linear time invariant system is given by h(t)

= (t-2) + (t-3). The step response of this system at t=1 will be -A 2

B 0

C 3

D 1

Q.No: 88 The distance between adjacent maxima and minima in a standing waveof a transmission line is given by

A /4

B /8

C

D /2

Q.No: 89 The superposition principle can not be applied for:

A power computation

B current computation

C voltage computation

D bilateral components

Q.No: 90 The intrinsic impedance of free space is given by:

A 20 Ohm

B 377 Ohm

C 177 Ohm

D 277 Ohm


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Q.No: 91 Which of the following pulse modulation technique is analog:

A PWM

B Differential PCM

C Delta

D PCM

Q.No: 92 Which relation is not true in Boolean algebra ?

A A(B + C) = AB + AC

B A + AC = A

C A(BC) = (AB)C

D A(A + C) = 1

Q.No: 93 A full- wave diode bridge rectifier circuit has :

A 8 diodes

B 4 diodes

C 3 diodes

D 2 diodes

Q.No: 94 The assumption of ergodic process in communication system means -A The random signals have identical ensemble averages

B The random signals have identical time averages


D The random signals have the identical time and ensemble averages

Q.No: 95 The Wien bridge can be used for the following-

A Measurement of frequency and harmonic distortionB Measurement of frequency

C Measurement of resistance

D Measurement of harmonic distortion

The plot of the signal x(t) in the below figure represents:


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Q.No: 96

A Power signal

B None of these is correct

C Energy signal

D Energy signal and Power signal

Q.No: 97 The radiation power of an antenna which has radiation resistance equalto 500 ohm and fed by 20 A current, will be:

A 250 kW

B 200 kW

C 150 kW

D 100 kW

Q.No: 98 If f(t) is a function, then the Laplace transform of will be as-

A sF(s)–f(0)

B F(s)

C s 3 F(s)- f(0)

D s 2 F(s)

Q.No: 99 In order to sustain the oscillations, the Barkhausen criteria states that :A None of these is correct

B The loop gain of the circuit should be equal to 1 with phase shift 180degree lagging

C The loop gain of the circuit should be negligible

D The phase shift around the circuit should be 90 degree lag

Q.No: 100 The following motor is used for the compressors.

A DC series motor

B Capacitor-start capacitor-run motor

C Shaded pole motor

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