(Download) BSNL Junior Engineer (JE) Solved Question Paper - 2016
"held on 27 Sep 2016 |  Morning shift"

EXAM DATE : 27092016
EXAM NAME : BSNL Online Examination 2016
TOTAL MARKS : 200
EXAM START TIME : 10:00:00
EXAM DURAITON : 03:00:00
TOTAL NO OF QUESTIONS : 200

Question 1.Pick the Synonym for the word "transparent"

Options:
a) verbose
b) involved
c) lucid
d) witty

Correct Answer: lucid

Question 2.Pick the most suitable one word substitute for "A person who does not believe in the existence of God"

Options:
a) Theist
b) Atheist
c) Ascetic
d) Agnostic

Correct Answer: Atheist

Question 3.Which of the choices given below should replace the phrase given in bold in the following sentence to make the sentence grammatically meaningful and correct.

The differences between two photographs will remove with the help of Photoshop.

Options:
a) should remove
b) could have been removed
c) must have removed
d) had removed

Correct Answer: could have been removed

Question 4.Choose the odd one from given four choices :

Options:
a) Honey
b) Pearl
c) Coral
d) Resin

Correct Answer: Resin

Question 5.Find out the correct spelt word from the choices given :

Options:
a) Excessive
b) Exccessive
c) Exccesive
d) Excesive

Correct Answer: Excessive

Question 6.Choose the word which is the exact OPPOSITE of the given words:  BELITTLE

Options:
a) Criticize
b) Flatter
c) Exaggerate
d) Adore

Correct Answer: Exaggerate

Question 7.Choose the appropriate word in the blank from the given alternatives. India is planning _______ many atomic plants to generate power.

Options:
a) builds
b) to build
c) building
d) be builds

Correct Answer: to build

Question 8.Choose the correct plural of the following word: Church

Options:
a) Churchs
b) Churches
c) Many Church
d) Churchies

Correct Answer: Churches

Question 9.Select one word which is closest in meaning to the statement in the question : A person who talks too much

Options:
a) Astute
b) Discerning
c) Garrulous
d) Perceptive

Correct Answer: Garrulous

Question 10.Choose the appropriate options to complete the sentences: We tried hard, and in the end, we were able to_____________ Pradeep ______________us
his car just for an hour

Options:
a) make / lending
b) force / lend
c) get / to lend
d) have / lent

Correct Answer: get / to lend

Question 11.In which year was the TRAI set up?

Options:
a) 1997
b) 1998
c) 1999
d) 2000

Correct Answer: 1997

Question 12.The focal length of lens of the eye is under the control of

Options:
a) iris
b) pupil
c) ciliary body
d) cornea

Correct Answer: ciliary body

Question 13.Who became the first India born basketball player to be picked in National Basketball Association (NBA)

Options:

a) Balbir Singh
b) Satnam Singh Bhamra
c) Balbir Chauhan
d) Ramesh Rathode

Correct Answer: Satnam Singh Bhamra

Question 14.Which company has been awarded the Leading Oil & Gas Corporate of the Year ­2015 award?

Options:
a) IOC
b) ONGC
c) HPCL
d) BPCL

Correct Answer: IOC

Question 15.Which of the following festivals is not a harvest festival of India

Options:
a) Onam
b) Pongal
c) Bhogali Bihu
d) Lohri

Correct Answer: Lohri

Question 16.M.F. Hussain is famous for

Options:
a) Poet
b) Musician
c) Painter
d) Journalist

Correct Answer: Painter

Question 17.Name the state whose boundaries touch maximum number of states

Options:

a) U.P.
b) M.P.
c) Bihar
d) Jharkhand

Correct Answer: U.P.

Question 18.Which day is celebrated as world Bio­Fuel day ?

Options:
a) 10 ­ August
b) 15 ­ September
c) 30­ August
d) 10­ September

Correct Answer: 10 ­ August

Question 19.Oxygen in our blood is transported by a protein named

Options:
a) haemoglobin
b) keratin
c) collagen
d) myoglobin

Correct Answer: haemoglobin

Question 20.The oldest mountains in India are

Options:
a) Aravalis
b) Vindhyas
c) Satpuras
d) Nilgiri Hills

Correct Answer: Aravalis

Question 21.

Options:
a) x² + log(x² + 1) + c
b) log(x² + 1) ­ x² + c
c) ½x² ­ ½log(x² + 1) + c
d) ½x² + ½log(x² + 1) + c

Correct Answer: ½x² ­ ½log(x² + 1) + c

Question 22. The angle between two lines whose direction cosines are l_1, m_1, n_1, and l₂, m₂, n₂ is

Options:
a) sin^-1(l₁l₂ + m₁m₂ + n1n₂)
b) cos^-1(l₁l₂ + m₁m₂ + n1n₂)
c) tan^-1(l₁l₂ + m₁m₂ + n1n₂)
d) cot^-1(l₁l₂ + m₁m₂ + n1n₂)

Correct Answer: cos^-1(l₁l₂ + m₁m₂ + n₁n₂)

Question 23.The Laplace transform of e^­2t sin 2ω is _______. e^­2t sin 2ω

 Options:

Question 24.Find the area of the parallellogram whose adjacent sides are given by the vectors

Options:
a) 42
b) √42
c) 21
d) √21

Correct Answer: 42

Question 25.For Multiplication of matrix which of the following is true

Options:
a) All Square Matrices can be multiplied
b) M x N matrix can be multiplied with M x N matrix
c) M x N matrix can be multiplied with N x A matrix
d) None of these

Correct Answer: M x N matrix can be multiplied with N x A matrix 

Options:
a) Tan (b/a)
b) Inv (tan (b/a))
c) Sin (b/a)
d) Inv (Sin(b/a))

Correct Answer: Inv (tan (b/a))

Question 27.

Options:
a) 2
b) 4
c) 1
d) 5

Correct Answer: 5

Question 28.

Options:
a) 7/3
b) 3/7
c) 2/3
d) 3/2

Correct Answer: 7/3

Question 29.Find the distance between the points (3, ­2) and (6,4).

a) √85
b) √79
c) 5√3
d) 3√5

Correct Answer: 3√5

Question 30.Find the radius of a circle whose diameter has endpoints (­3, ­2) and (7, 8).

Options:
a) 5
b) 5√2
c) (2, 3)
d) √52

Correct Answer: 5√2

Question 31.The partial differential equation

5(∂²z / ∂x²) + 6(∂²z / ∂y²) = xyis classified as

Options:
a) elliptic
b) parabolic
c) hyperbolic
d) none of these

Correct Answer: elliptic

Question 32.The partial differential equation

(∂²z / ∂x²) ­ 5(∂²z / ∂y²) = 0 is classified as

Options:
a) elliptic
b) parabolic
c) hyperbolic
d) none of these

Question 33.The ring Z[x] is

Options:
a) a PID
b) a UFD
c) a PID and a UFD
d) none of these

Correct Answer: a UFD

Question 34.Given that y1(x)=x­1is one solution of 2x²y"+3xy'­y=0,x>0. Then the second linearly independent solution is

Options:

a) x­²
b) x
c) x^1/2
d) x^1/2

Correct Answer: x^1/2

Question 35.A system consisting of two particles moves on a plane. Then the degree of freedom is

Options:
a) 2
b) 3
c) 4
d) 6

Correct Answer: 4

Question 36.For a conservative holonomic dynamical system, the Lagrangian L, kinetic energy T and potential energy V are connected by

Options:
a) L=T+V
b) L=T­V
c) L=2T+V
d) L=2T­V

Correct Answer: L=T­V

Question 37.The Fourier sin transform of xm­1 is defined by

Options:
a) ∫0^∞x^m­1sin sx
b) ∫∞^∞x^m­1sin sx
c) ∫0^∞x^m­1sin x
d) ∫∞^∞x^m­1sin x

Correct Answer: ∫0^∞x^m­1sin sx

Question 38.Lsin² at equals Lsin

Options:
a) 2a²/s(s²+4a²)
b) 2a²/s(s²­4a²)
c) 2s/(s²+4a²)
d) none of these

Correct Answer: 2a²/s(s²+4a²)

Question 39.A spectrum line λ=6000 Å of a star is found to be shifted 0.1 Å towards longer wavelengths from the position of the same line in terrestrial laboratory.

Assuming the shift to be due to Doppler effect, what is the velocity of the star?

Options:
a) 5 X 10⁴ m/sec
b) 5 X 10³ m/sec
c) 2.5 X 10⁴ m/sec
d) 2.5 X 10³ m/sec

Correct Answer: 5 X 10³ m/secss

Question 40.An induction wattmeter can be used for

Options:
a) both D.C. and A.C.
b) D.C. only
c) A.C. only
d) any of the these

Correct Answer: A.C. only

Question 41.Intel 8085 is an _____ MUP

Options:
a) 8 bit NMOS
b) 8 bit CMOS
c) 8 bit PMOS
d) 8 bit HMOS

Correct Answer: 8 bit NMOS

Question 42. The transition elements are also known as the _____­block elements.

Options:
a) a
b) b
c) c
d) d

Correct Answer: d

Question 43.In MKS system, the unit of time is

Options:
a) hour
b) second
c) minute
d) day

Correct Answer: second

Question 44.Light waves

Options:
a) can travel in perfect vaccum
b) require air to travel through
c) require an electric field to travel through
d) require a magnetic field to travel throug

Correct Answer: require air to travel through

Question 45.When light passes from air to glass, it experiences change of

Options:
a) frequency/ wavelength
b) frequency and speed
c) wavelength and speed
d) frequency, wavelength and speed

Correct Answer: frequency and speed

Question 46.____________ is a dimensionless quantity .

Options:
a) Gravity
b) Specific Gravity
c) Density
d) acceleration

Correct Answer: Specific Gravity

Question 47.1KWH is unit of

Options:
a) Time
b) Power
c) Energy
d) Stress

Correct Answer: Energy

Question 48.Which of the following has no units?

Options:
a) Thermal capacity
b) Magnetic susceptibility
c) Angular acceleration
d) Moment of a magnet

Correct Answer: Magnetic susceptibility

Question 49.kg m/sec is the unit of

Options:
a) Impulse
b) Angular acceleration
c) Capacity of condenser
d) Acceleration

Correct Answer: Impulse

Question 50.The fundamental unit which is common in F.P.S and M.K.S systems is

Options:
a) foot
b) sec
c) kilo gram
d) pound

Correct Answer: sec

Question 51.Reflectivity of metals:

Options:
a) 0.05
b) 0.50
c) 0.95
d) None

Correct Answer: 0.95

Question 52.Technique used to absorb noise by using soft and porous surfaces is called

Options:
a) acoustic protection
b) refraction
c) absorption
d) semi lunar protection

Correct Answer: acoustic protection

Question 53.By exposure of electrons beams on atoms and observing their behavior upon fall of beam can help to determine

Options:
a) charge
b) weight
c) length
d) all

Correct Answer: charge

Question 54.Atomic spectra is an example of

Options:
a) line spectra
b) continuous spectra
c) band spectra
d) both line spectra and continuous spectra

Correct Answer: line spectra

Question 55.Electron in atom are held in atom due to

Options:
a) coulombs force
b) nuclear force
c) atomic force
d) both coulombs force and nuclear force

Correct Answer: coulombs force

Question 56.Work done on body equals to change in its kinetic energy is known as

Options:
a) work done principle
b) work­energy principle
c) work­velocity principle
d) speed­displacement principle

Correct Answer: work­energy principle

Question 57.A capacitor is charged by a constant current of 2 mA and results in a voltage increase of 12 V in a 10 sec interval. The value of capacitance is­

Options:
a) 0.75 mF
b) 1.33 mF
c) 0.6 mF
d) 1.67 mF

Correct Answer: 1.67 mF

Question 58.What is the value of Req?

Options:
a) 11.86 Ω
b) 10 Ω
c) 25 Ω
d) 11.18 Ω

Correct Answer: 11.18 Ω

Question 59.Ohm’s law is not applicable for

Options:
a) Insulators
b) electrolytes
c) vacum ratio valves
d) Arc lamps

Correct Answer: Insulators

Question 60.If 120 C of charge passes through an electric conductor in 60 sec, the current in the conductor is

Options:
a) 0.5 A
b) 2A
c) 1A
d) 4A

Correct Answer: 2AQuestion 61.In the above circuit the currents I1 and I2 are

Question 61.In the above circuit the currents I₁ and I₂ are

Options:
a) 6A,3A
b) 3A,6A
c) 4.5A,4.5A
d) 5A,4A

Correct Answer: 6A,3A

Question 62.What is the form factor of pure sine wave?

Options:
a) 1.11
b) 1.414
c) 1.732
d) 0.5

Correct Answer: 1.11

Question 63.Two uncoupled 3 H inductors are connected in parallel. Their total inductance is

Options:
a) 1.5 H
b) 6 H
c) 12 H
d) 3 H

Correct Answer: 1.5 H

Question 64.The Energy Stored in a Capacitor can be represented as

Options:
a) CV²/2
b) V²/2C
c) C²V/2
d) None of these

Correct Answer: CV²/2

Question 65.Faraday's Law is applicable

Options:
a) In all changing Magnetic fileds
b) In all moving conductors
c) Only when the conductor is closed loop of thin wire
d) Only when magnetic field is of permanent magnet

Correct Answer: Only when the conductor is closed loop of thin wire

Question 66.In insulators

Options:
a) Internal Electric Charges flows freely with external electric field
b) Internal Electric Charges does not flow freely with external electric field
c) Internal Electric Charges flows along with external electric field
d) Internal Eelectric Charges flows opposite to external electric field

Correct Answer: Internal Electric Charges does not flow freely with external electric field

Question 67.The resistance of a parallel circuit consisting of two resistors is 12 ohms. One of the resistence wire breaks and the effective resistance become 18 ohms. The resistence of the broken wire is

Options:
a) 48 ohms
b) 18 ohms
c) 36 ohms
d) 24 ohms

Correct Answer: 36 ohms

Question 68.voltage drope across 14.5 Ohm resester as in figure is

Options:
a) 29 V
b) 30.5 V
c) 14V
d) 18V

Correct Answer: 30.5 V

Question 69. the total condatance of the circut below

Options:
a) 13
b) 1.6
c) 6
d) 2.5

Correct Answer: 13

Question 70.Norton's theorem is …….. Thereni's theorem

Options:
a) the same as
b) converse of
c) none of these
d) cannot say

Correct Answer: none of these

Question 71.Power factor of a circuit can be improved by the use of

Options:
a) choke coil
b) capacitor
c) induction motor
d) none

Correct Answer: capacitor

Question 72.Domestic appliances are connected in parallel across AC mains becauseOptions:

a) it is simple arrangement
b) operation of each appliance becomes independent of each other
c) appliances have same current ratings
d) none of this

Correct Answer: operation of each appliance becomes independent of each other

Question 73.A coil having an inductance of 150 mH is carrying a current of 5 Amp. If the current is reduced to zero in 1 milli seconds, the self­induced emf will be

Options:
a) 125V
b) 375V
c) 500V
d) 750V

Correct Answer: 750V

Question 74.Kirchoff's Voltage Law is known as

Options:
a) Conservation of Charge
b) Conservation Energy
c) Both
d) None

Correct Answer: Conservation Energy

Question 75.An n ­type silicon bar 0.1 cm long and 100 μm² cross­sectional area has a majority carrier concentration of 5 x 10 20/m³ and the carrier mobility is 0.13m²/V­s at 300 K. If charge of an electron is 1.6 X 10^-19 coulomb, the resistance of the bar is­

Options:
a) 10⁶ Ohm
b) 10⁷ Ohm
c) 10⁵ Ohm
d) 10⁴ Ohm

Correct Answer: 10⁶ Ohm

Question 76.Assume that the β of transistor is extremely large and VBE = 07. V, IC and VCE in the circuit shown in the figure are ­

Options:
a) I_c= 1 mA, V_CE= 4.7 V
b) I_c= 0.5 mA, V_CE= 3.75 V
c) I_c= 1 mA, V_CE= 2.5 V
d) I_c= 0.5 mA, V_CE= 3.9 V

Correct Answer: I_c= 1 mA, V_CE= 2.5 V

Question 77.What is the range of an FET's input impedance?

Options:
a) 10Ω to 1 kΩ
b) 1 kΩ to 10 kΩ
c) 50 kΩ to 100 kΩ
d) 1 MΩ to several hundred MΩ

Correct Answer: 1 MΩ to several hundred MΩ

Question 78.Silicon is preferred for manufacturing zener diode because it

Options:
a) is relatively cheap
b) needs lower doping level(doping)
c) has higher temperature and current capacity
d) has lower break­down voltage

Correct Answer: has higher temperature and current capacity

Question 79.A darlington pair and an emitter follower have the same

Options:
a) input impedance
b) current gain
c) voltage gain
d) power gain

Correct Answer: voltage gain

Question 80.Seminconductor material have (semiconductor)

Options:
a) ionic bands
b) covalent bonds
c) mutual bonds
d) metallic bonds

Correct Answer: covalent bonds

Question 81.Silicon has Z=14, its outermost orbit is

Options:
a) partially filled
b) half filled
c) completey occupied
d) empty

Correct Answer: half filled

Question 82.Input impedance of BJT is

Options:
a) Higher than that of FET
b) Lower than that of FET
c) Depends upon the type of usage
d) Same as that of FET

Correct Answer: Lower than that of FET

Question 83.Leakage current in the Silicon semicondcutor is in the order of

Options:
a) Amps
b) milli Amps
c) micro Amps
d) nano Amps

Correct Answer: nano Amps

Question 84.In a N­ channel JFET, Drain current is maximum when Gate Voltage VGS is ______

Options:
a) equal to +VDD
b) morethan to + VDD
c) equal to "0 volts"
d) All of these

Correct Answer:equal to "0 volts"

Question 85.Which of the following is true with respect to DC Amplifier ( Direct coupled amplifier)

Options:
a) Capable of amplifying DC signals
b) is designed without use of any coupling capacitors at input
c) Poor Thermal stabilty
d) All of these

Correct Answer: All of these

Question 86.In a BJT, the base spreading resistance is of the order of

Options:
a) 1Ω
b) 10Ω
c) 100Ω
d) 1000Ω

Correct Answer: 100Ω

Question 87.Typically Ge transistors are operated over temperature range extending from

Options:
a) ­25°C to +175°C
b) ­65°C to +75°C
c) ­65°C to +175°C
d) ­25°C to +75°C

Correct Answer: ­65°C to +75°C

Question 88.Effect of cascading several amplifier stages is t

Options:
a) reduce the overall gain ओवरआल गेन को कम करता है
b) reduce the overall frequency response
c) increase the overall gain and reduce the frequency response
d) decrease the overall gain and increase the frequency response

Correct Answer: increase the overall gain and reduce the frequency response

Question 89.Schmitt trigger is also known as

Options:
a) squaring circuit
b) blocking oscillator
c) sweep circuit
d) astable multivibrator

Correct Answer: squaring circuit

Question 90.Which of the following circuits is used is used for production of delays

Options:
a) Astable multivibrator
b) Bistable multivibrator
c) Monostable multivibrator
d) Schmitt trigger

Correct Answer: Monostable multivibrator

Question 91.The battery connections required to forward bias a pn junction are

Options:
a) +ve terminal to p and ­ve terminal to n+ve
b) ­ve terminal to p and +ve terminal to n­ve
c) ­ve terminal to p and ­ve terminal to n­ve
d) None of these

Correct Answer: +ve terminal to p and ­ve terminal to n+ve

Question 92.The ratio of reverse resistance and forward resistance of a germanium crystal diode is about

Options:
a) 1:1
b) 100:1
c) 1000:1
d) 40000:1

Correct Answer: 40000:1Question 93.A master ­ slave flip flop has the characteristic that­

Question 93.A master slave flip flop has the characteristic that

Options:
a) change in the input is immediately reflected in the output
b) change in the output occurs when the state of the master is affected
c) change in the output occurs when the state of the slave is affected
d) both the master and the slave states are affected at the same time

Correct Answer: change in the output occurs when the state of the slave is affected

Question 94.The ripple counter shown in the given figure works as a­

Options:
a) mod­3 up counter
b) mod­5 up counter
c) mod­3 down counter
d) mod­5 down counter

Correct Answer: mod­5 down counter

Question 95.The Boolean experssion Y=A'B'C'D + A'BCD' + AB'C'D + ABC'D' can be minimized

Options:
a) Y=A'B'C'D + A'BC' + AC'D
b) Y= A'B'C'D + BCD' + AB'C'D
c) Y= A'BCD' + B'C'D + AB'C'D
d) Y=A'BCD' + B'C'D + ABC'D'

Correct Answer: Y=A'BCD' + B'C'D + ABC'D'

Question 96.In a 3.5 digital voltmeter, the largest number that can be read is

Options:
a) 999
b) 1999
c) 4999
d) 9999

Correct Answer: 1999

Question 97.For a 4096 x 8 EPROM, the number of address lines is

Options:
a) 14
b) 12
c) 10
d) 8

Correct Answer: 12

Question 98.The ___________ gate is generally used to check for or to generate the proper parity in a code.

Options:
a) NAND
b) NOR
c) EX­NOR
d) EX­OR

Correct Answer: EX­OR

Question 99.A circuit has an output that is determined by the present input as well as previous output states, the circuit is known as

Options:
a) mealey machine
b) moore machine
c) sequential circuit
d) None of these

Correct Answer: sequential circuit

Question 100.Shifting the contents of a shift register, left by one place, is equivalent to

Options:
a) Dividing the contents by 10
b) Dividing the contents by 2
c) Multiplying the contents by 2
d) None of these

Correct Answer: Dividing the contents by 2

Question 101.CMOS circuits are extensively used for ICchips fabrication, mainly because of their extremely

Options:
a) low power dissipation
b) large packing density
c) high noise immunity
d) low cost

Correct Answer: large packing density

Question 102.Simple Delay Circuit can be constituted by

Options:
a) Shift Registers
b) Flip Flops
c) Multiplexer
d) All of these

Correct Answer: Shift Registers

Question 103.FG in Hexadecimal Systems can be written in Binary System as

Options:
a) 11111100
b) 11110011
c) 11111111
d) Not a valid Hexadecimal Number

Correct Answer: Not a valid Hexadecimal Number

Question 104.The bandwidth of an audio amplifier extends from 20 Hz to :

Options:
a) 2000 Hz
b) 10000 Hz
c) 20000 Hz
d) 100000 Hz

Correct Answer: 20000 Hz

Question 105.How many bytes are there in binary number 1001101000111010 ?

Options:
a) 1
b) 2
c) 3
d) 4

Correct Answer: 2

Question 106.The diameter of an atom is

Options:
a) 10^-6
b) 10^-10
c) 10^-15
d) 10^-21

Correct Answer: 10^-10

Question 107.The binary equivalent of decimal number 17 is

Options:
a) 10000
b) 01111
c) 100001
d) 11111

Correct Answer: 01111

Question 108.The Flip Flop which acts as Frequency divider is

Options:
a) SR Flip Flop
b) D Flip Flop
c) T Flip Flop
d) None

Correct Answer: T Flip Flop

Question 109.Five memory chips of 16 X 4 size have their address buses connected together. This system will be of size

Options:
a) 16 X 16
b) 16 X 20
c) 20 X 16
d) 16 X 64

Correct Answer: 16 X 20

Question 110.The equipment uses Binary coded decimal (BC) numbers is

Options:
a) pocket calculator
b) electronic counter
c) digital voltmeter
d) all of these

Correct Answer: all of these

Question 111.The current drawn by a 120 V DC motor of armature resistance 0.5 Ω and back emf 110 V is ____ ampere.

Options:
a) 20
b) 240
c) 220
d) 5

Correct Answer: 20

Question 113.A good tranformer must have voltage regulation as high as possible

Options:
a) TRUE
b) FALSE
c) Cannot be said
d) None of these

Correct Answer: FALSE

Question 114.The brushes of a dc machine are made of

Options:
a) iron
b) brass
c) mica
d) carbon

Correct Answer: carbon

115.Calculate the regulation of transformer in which ohmic loss is 1% of the output and reactance drop is 5% of the voltage, when the power factor is 0.8 Lag

Options:
a) 3.8%
b) 3.5%
c) 1%
d) 5%

Correct Answer: 3.8%

Question 116.The apparent power of AC Flow is measured in :

Options:
a) Watts
b) Joules
c) Volt­Amp
d) Amp­Hour

Correct Answer: Volt­Amp

Question 117.The RMS Output of Full wave rectifier is

Options:
a) V (peak)/Sqrt(2)
b) V (peak)/Sqrt(π)
c) V (peak)/π
d) None of these

Correct Answer: V (peak)/Sqrt(2)

Question 118.Standard Motor Starter supplies ____________ initial voltage for proper starting of the motor.

Options:
a) Higher
b) Constant
c) Normal
d) Lower

Correct Answer: Lower

Question 119.In an ideal transformer the no load primary current I0____________

Options:
a) is in phase with V₁
b) leads V₁ by 90 degree
c) lags V₁ by 90 degree
d) lags V₁ behind 90 degree

Correct Answer: lags V₁ behind 90 degreeQuestion

120.When the direction of power flow reverses, a differentialy compounded DC motor becomes ______________

Options:
a) a shunt motor
b) a series motor
c) a cumulatively compounded generator
d) a differentially compounded generator

Correct Answer: a cumulatively compounded generator

Question 121.The speed of 3 phase, 4 pole, 50 Hz induction motor whose rotor in energysed from an independent 3 phase, 30 Hz supply, is__________RPM

Options:
a) 600
b) 2400
c) either 'a' or 'b'
d) 900

Correct Answer: either 'a' or 'b'

Question 122.The motor normally used for crane travel is ______________

Options:
b) d.c. differentially compounded motor
c) ward leonard controlled d.c. shunt motor
d) a.c. slip ring motor

Correct Answer: a.c. slip ring motor

Question 123.In an induction motor for a value slip(s)=0, the torque (T) is

Options:
a) maximum
b) zero
c) minimum
d) Twice the value of full torque

Correct Answer: Twice the value of full torque

Question 124.What is the percentage power saving when the carrier and one of the sidebands are suppressed in an AM wave modulated to a depth of 50% ?

Options:
a) 66.6%
b) 50%
c) 33.3%
d) 94.4%

Correct Answer: 94.4%

Question 125.In PCM system, if the quantization levels are increased from 2 to 8, the bandwidth requirement will­

Options:
a) remain same
b) be doubled
c) be tripled
d) become four times

Correct Answer: be tripledQuestion 126.The modulation inherently most noise resistant is ­

Question 126.The modulation inherently most noise resistant is ­

Options:
a) SSB supressed carrier
b) frequency modulation
c) pulse position modulation
d) pulse code modulation

Correct Answer: pulse code modulation

Question 127.If the lower sideband overlaps the basebands, the distortion is called

Options:
a) Cross­Over distortion
b) Aliasing
c) Cross­talk
d) None of these

Correct Answer: Aliasing

Question 128.The ring modulator is generally used for generating

Options:
a) SSB/SC signal
b) ISI Signal
c) wideband signal wideband
d) DSB /SC signal

Correct Answer: DSB /SC signal

Question 129. A duplexer is used to

Options:
a) couple two antennas to a transmitter
b) isolate the antenna from the local oscillator
c) prevent interference between two antennas connected to receiver
d) uses same antenna for reception and transmission without interference

Correct Answer: uses same antenna for reception and transmission without interference

Question 130.AGC voltage is applied to the stages which are ______________

Options:
a) before the detector stage
b) after the detector stage
c) either before or after the detector stage
d) none of these

Correct Answer: before the detector stage

Question 131.PDM is generated by employing ______________

Options:
a) monostable multivibrator
b) schmitt trigger
c) free running multivibrator
d) JK flip flop

Correct Answer: monostable multivibrator

Question 132.Which of the following microwave tube amplifiers uses an axial magnetic field and radial electric field ?

Options:
a) CFA
b) Coaxial magnetron
c) Travelling wave magnetron
d) Reflex klystron

Correct Answer: CFA

Question 133.The Hartley law states that _______________

Options:
a) the maximum rate of information transmission depends on the channel bandwidth
b) the maximum rate of information depends on the depth of modulation
c) redudancy is essential
d) only binary code may be used

Correct Answer: the maximum rate of information transmission depends on the channel bandwidth

Question 134.VLF waves are used for some types of services because

Options:
a) of the low power required
b) they are very reliable
c) the transmitting antennas are of convenient size
d) interleaves pulses belonging to different transmission

Correct Answer: they are very reliable

Question 135.Transposition of open wires in carrier systems is necessary to

Options:
a) avoid cross talk
b) boost the signal levels
c) increase the band width
d) None of these

Correct Answer: None of these

Question 136.The following is analog media

Options:
a) em
b) cable PCM
c) OFC system
d) digital micro­wave

Correct Answer: em

Question 137.Loading of a cable is done to

1. Increase its inductance
2. Increase its leakage resistance
3. Decrease its leakage resistance
4. Achieve distortionless condition

Options:
a) 1,3 &4
b) 1 & 3 only
c) 2 & 4 only
d) 1 & 4 only

Correct Answer: 1 & 4 only

Question 138.The dynamic impedance of a parallel RLC circuit at resonance is

Options:
a) C /LR
b) L/CR
c) R/LC
d) RLC

Correct Answer: L/CR

Question 139.In a transmission line terminated by characteristic impedance, Z_o

Options:
a) The reflection is maximum due to termination
b) There are a large number of maximum and minimum on the line.
c) The incident current is zero for any applied signal
d) There is no reflection of the incident wave.

Correct Answer: There is no reflection of the incident wave.

Question 140.Inductive Impedance of a load increases with

Options:
a) Increase in Frequency
b) Decrease in Frequency
c) Increase in Amplitude
d) Decrease in Amplitude

Correct Answer: Increase in Frequency

Question 141.Phase Modulation is gernerally not used for transmission because

Options:
a) It needs higher power
b) it needs large Antennaa Sizes
c) It is complex for decoding
d) It does not carry much information

Correct Answer: It is complex for decoding

Question 142.Voltage Controlled Oscillator is used for

Options:
a) Decoding FM signal
b) Generating FM Signal
c) Decoding AM Signal
d) Generating AM Signal

Correct Answer: Decoding FM signal

Question 143.The Characteristic impedance of transmission line

Options:
a) Increases with increase in length
b) Decreases with length of line
c) Independent of Line Length
d) None of these

Correct Answer: Independent of Line Length

Question 144.Characteristic impedance is given by _____________

Options:
a) Z0=√(OCSC
b) Z0=√(SCOC
c) Z0=√(OCSC
d) Z0=1/√(OCSC

Correct Answer: Z0=√(OCSC

Question 145.Zo of constant K filter in the pass band B is _____________

Options:
a) a pure inductance
b) a pure resistance
c) a pure capacitance
d) a complex impedance

Correct Answer: a pure resistance

Question 146.In an A.C. resistive circuit the current _________ voltage by__________ degrees

Options:
a) lags, 90
b) leads, 90
c) lags, 0
d) lags, 30

Correct Answer: leads, 90

Question 147.The output of a lead acid cell is

Options:
a) 1.25V
b) 1.35V
c) 2.2V
d) 6V

Correct Answer: 1.25V

Question 148.The time constant of a capacitive circuit is

Options:
a) CR
b) C/R
c) wC/R
d) wCR

Correct Answer: wC/R

Question 149.RMS value is related to peak value as

Options:
a) RMS value = 0.707 x peak value
b) RMS value = 1/0.707 x peak value
c) RMS value = 1.414 x peak value
d) RMS value = 1/1.414 x peak value

Correct Answer: RMS value = 0.707 x peak value

Question 150.In figure, Za = 100∠50°, Zb = 300∠­90° and Zc = 200∠0°. For balanced condition, Zd will be ­

Options:
a) 600 ∠ ­40°
b) 600 ∠ 140°
c) 600 ∠ ­140°
d) 150 ∠ 140°

Correct Answer: 600 ∠ ­140°

Question 151. The Y plates of a CRO are excited by a voltage 2 sin 100 t and the X plates are not connected. The display would be ­

Options:
a) a vertical line
b) a horizontal line
c) A sine wave
d) A slant line

Correct Answer: a vertical line

Question 152.The operation of a Thermocouple is based on

Options:
a) Thomson effect
b) Seebeck effect
c) Peltier effect
d) Faraday's laws

Correct Answer: Seebeck effect

Question 153.A tachometer encoder has

Options:
a) one output
b) two outputs
c) three outputs
d) none of these

Correct Answer: one output

Question 154.Pulse Shaping in line coding is used for

Options:
a) Using Optimum Power Consumption
b) Using Optimum Bandwidth
c) Maximize Intersymbol Interference
d) Simplicity of Circuits

Correct Answer: Using Optimum Bandwidth

Question 155.PID controller uses _______________ Between input and output

Options:
a) Proprtional Relation
b) Integral Relation
c) Differential Relation
d) All of these

Correct Answer: All of these

Question 156.In measurement system, which of the following are undesirable static characteristic?

Options:
a) sensitivity and accuracy
b) drift,static error and dead zone
c) drift, static error, dead zone and non­linearity
d) reproducibility and non­linearity

Correct Answer: drift, static error, dead zone and non­linearity

Question 157.A crircuilar piece of specimen has surface resistance RS. Its diameter is d and the thickness is t. The surface resistivity ρS of the specimen is given by ___________

Options:
a) π d² R_S/t
b) R_S/t/π d
c) R_S/t/π d²
d) π dR_S/t

Correct Answer: π dRS/t

Question 158.The rotor of a synchro transmitter ________

Options:
a) uses a salient pole type of construction
b) uses a cylindrical type of construction
c) may use either salient pole or cylindrical type of construction
d) none of these

Correct Answer: uses a salient pole type of construction

Question 159. Maxwell's inductance­capacitance A.C. bridge is used for measurement of inductance of ____________

Options:
a) low and medium Q coils
b) high Q coils
c) low Q coils
d) medium Q coils

Correct Answer: medium Q coils

Question 160.The most basic of all instruments is

Options:
a) The Current meter
b) The Voltmeter
c) The Multimeter
d) The Oscilloscope

Correct Answer: The Voltmeter

Question 161.A 100 micro Amp, 3000 ohm meter movement, the shunt resistance for double the current range is ____

Options:
a) 100 ohm
b) 1,500 ohm
c) 3,000 ohm
d) 60K ohm

Correct Answer: 60K ohm

Question 162.A voltmeter must have a very high internal resistance so that the

Options:
a) accuracy is high
b) resolution is high
c) meter draws minimum current
d) loading is maximum

Correct Answer: resolution is high

Question 163. For a second order system settling time is T_s= 7 s and peak time is T_p = 3 s. The location of poles are­

Options:
a) ­0.97 ± j0.69
b) ­0.69 ± j0.97
c) ­1.047 ± j0.571
d) ­0.571 ± j1.047

Correct Answer: ­0.571 ± j1.047

Question 164. The Nyquist plot of a open­loop transfer function G(jw)H(jw) of a system encloses the (–1, j0) point. The gain margin of the system is­

Options:
a) less than zero
b) greater than zero
c) zero
d) infinity

Correct Answer: less than zero

Question 165.The constant M circle for M=1 is the

Options:
a) staright line x=­1/2
b) Critical point (­1, j0)
c) circle with r=0.33
d) circle with r=0.67

Correct Answer: staright line x=­1/2

Question 166.The unity feedback system is characterised by an open loop transfer function G(s)=K/s(s+10). Determine the gain K, so that the system will have damping ratio of 0.5 .

Options:
a) 10
b) 100
c) 1000
d) 0.1

Correct Answer: 100

Question 167.The impulse response of an R­L circuit is

Options:
a) rising exponential function
b) decaying exponential function
c) step function
d) parabolic function

Correct Answer: decaying exponential function

Question 168.A communication channel with additive whit Gaussian noise, has a bandwidth of 4 KHz and SNR of 15. Its channel capacity is

Options:
a) 1.6 Kbps
b) 16 Kbps
c) 32 Kbps
d) 256 Kbps

Correct Answer: 32 Kbps

Question 169.Feed back in an amplifier always helps to _____________

Options:
a) increase its gain
b) decrease its input impedance
c) stabilize its gain
d) control its output

Correct Answer: control its output

Question 170.Gain cross over fequency is that frequency at which _______

Options:
a) |GH(j ω)|=0
b) |GH(j ω)|=1
c) |GH(j ω)|=∞
d) |GH(j ω)|=1/√2

Correct Answer: |GH(j ω)|=1

Question 171.Magnetic amplifiers are used for

Options:
a) Voltage amplification
b) Current amplification
c) Power amplification
d) All of these

Correct Answer: Current amplification

Question 172.The loading effect on the potentiometer can be avoided by the use of

Options:
a) Alternator,
b) Battery
c) Constant current source
d) Trimmer

sCorrect Answer: Battery

Question 173.The frequency domain and time domain analysis are related through

Options:
a) Fourier transformation
b) Laplace transformation
c) All of these
d) Z­transformation

Correct Answer: Laplace transformation

Question 174.Transfer function of a system is defined as the ratio of output to input in

Options:
a) Laplace transform
b) Z­transform
c) Fourier transform
d) Single algebraic form

Correct Answer: Z­transform

Question 175.The margin between actual gain and critical gain is a measure of

Options:
a) Relative stability
b) Absolute stability
c) Sensitivity
d) Gain margin

Correct Answer: Sensitivity

Question 176.The Programmable interrupt controller is required to ­

Options:
a) handle one interrupt request
b) handle one or more interrupt requests at a time
c) handle one or more interrupt requests with a delay
d) handle no interrupt request

Correct Answer: handle one or more interrupt requests at a time

Question 177.The number of hardware interrupts present in 8085 are

Options:
a) 5
b) 8
c) 10
d) 16

Correct Answer: 5

Question 178.The correct sequence of steps to perform "Fetch" opearation in microprocessor is

1. Opcode is decoded
2. Places the address of first byte of instruction on the address bus
3. Gets opcode on the databus

Options:
a) 1, 2, 3
b) 3, 1
c) 2, 1
d) 2, 3, 1

Correct Answer: 2, 3, 1

Question 179.SD RAM refers to

Options:
a) Static DRAM
b) Synchronous DRAM
c) Semi DRAM
d) All of these

Correct Answer: Synchronous DRAM

Question 180.A stack is normally used in digital computers to store the return address at the time of a subroutine call because

Options:
a) Stacks are nonvolatile memories
b) Stacks have large capacity
c) Information in a stack cannot be altered by other instructions
d) Stacks permit easy nesting of subroutine

Correct Answer: Stacks permit easy nesting of subroutine

Question 181.Multiplexing of address and data lines is used in

Options:
a) Intel 8086
b) Z­80
c) 6502
d) MC­68000

Correct Answer: Intel 8086

Question 182.In relational model, the data structures are

Options:
a) simple
b) compiled
c) both simple & compiled
d) All of these

Correct Answer: simple

Question 183.For fibre optical sencsors ___________

Options:
a) multimode transmission is used
b) single mode transmission is used
c) both single and multimode transmission is commonly used
d) none of these

Correct Answer: single mode transmission is used

Question 184.MPU connections to the data bus are considered ______________

Options:
a) input
b) output
c) both inputs and outputs
d) none of these

Correct Answer: both inputs and outputs

Question 185.In 8085 MPU, the flag flip flops have ______________ status indicators.

Options:
a) 5
b) 2
c) 4
d) 1

Correct Answer: 5

Question 186.The 8085 is an enhancement of the popular INTEL ____________ microprocessor.

Options:
a) 8080
b) 8155
c) 8355
d) 8086

Correct Answer: 8080

Question 187.Which of the following is a DMA controller ?

Options:
a) Intel 8257
b) Intel 8259
c) Intel 8255
d) Intel 8253

Correct Answer: Intel 8257

Question 188.The address bus of 8085 MPU is a group of

Options:
a) 8 lines
b) 12 lines
c) 16 lines
d) 32 lines

Correct Answer: 32 lines

Question 189.An I/O processor control the flow of information between ­

Options:
a) cache memory and I/O devices
b) main memory and I/O devices
c) two I/O devices
d) cache and main memories

Correct Answer: main memory and I/O devices

Question 190.Which of the following services use TCP?

1. DHCP
2. SMTP
3. HTTP
4. TFTP
5. FTP

Options:
a) 1 and 2
b) 2, 3 and 5
c) 1, 2 and 4
d) 1, 3 and 4

Correct Answer: 2, 3 and 5

Question 191.The resultant binary of the decimal problem 49 + 1 = is __

Options:
a) 00110101
b) 01010101
c) 00110010
d) 00110001

Correct Answer: 00110010

Question 192.In high level programming language Pascal, each program statement ends with the

Options:
a) comma
b) semicolon
c) double quotation marks
d) single quotation marks

Correct Answer: semicolon

Question 193.The contents of information are stored in

Options:
a) memory data register
b) memory address registerr
c) memory access register
d) memory arithmetic register

Correct Answer: memory data register

Question 194.DMA channel facilitates data to move into and out of the system ____________

Options:
a) on first come first serve basis
b) without program intervention
c) without subroutine
d) with equal time delay

Correct Answer: without program intervention

Question 195.In a compiler, the module that checks every character of the source text is called ______

Options:
a) the code generator
b) the code optimizer
c) the lexical analyzer
d) syntax analyzer

Correct Answer: the lexical analyzer

Question 196.Dynamic memory cells are constructed using ___________

Options:
a) transistors
b) MOSFETs
c) flip­flops
d) FETs

Correct Answer: MOSFET

Question 197.A program that can be used repeatedly throughout a major program is called _

Options:
a) subroutine
b) loop
c) program module
d) tempelate

Correct Answer: subroutine

Question 198.A type of memory in which the stored data is not lost when the power is turned off is called

Options:
a) megnetic memory
b) non volatail memory
c) volatile memory
d) semiconductor memory

Correct Answer: semiconductor memory

Question 199.ADA is

Options:
a) machine code
b) assembly language
c) high level lanuguage
d) None of these

Correct Answer: assembly language

Question 200.Extension in DOS files can have a maximum of _______ characters

Options:
a) 4
b) 8
c) 2
d) 3

Correct Answer: 4

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