(Download) BSNL Junior Engineer (JE) Solved Question Paper - 2016
"held on 25 Sep 2016 | Afternoon shift"

EXAM DATE : 25092016
EXAM NAME : BSNL Online Examination 2016
TOTAL MARKS : 200
EXAM START TIME : 15:00:00
EXAM DURAITON : 03:00:00
TOTAL NO OF QUESTIONS : 200

Question 1.Pick the Antonym for the word "Abbreviate"

Options:
a) abridge
b) expand
c) achieve
d) accept

Correct Answer: expand

Question 2.A sentence is given in the Direct/Indirect form. Out of the four alternatives suggested, select the one which best expresses the same sentence in the
Indirect/Direct form:

"You have all done a marvellous job!" said the teacher.

Options:
a) The teacher said that they have all done a marvellous job.
b) The teacher exclaimed with happiness that they all did a marvellous job.
c) The teacher exclaimed with happiness that their job was marvellous.
d) The teacher exclaimed with happiness that they had all done a marvellous job.

Correct Answer: The teacher exclaimed with happiness that they had all done a marvellous job.

Question 3.Mark the most appropriate substitute to fill the blanks in the given description :
David cleaned his room by stuffing everything ______________his bed.

Options:
a) In
b) On
c) Under
d) Along

Correct Answer: Under

Question 4.Change the following sentences into passive voice :
They greet me cheerfully every morning.

Options:
a) I am greeted cheerfully by them every morning.
b) I am being greeted cheerfully by them every morning.
c) Cheerful greeting is done by them every morning to me.
d) Every morning I was greeted cheerfully.

Correct Answer: I am greeted cheerfully by them every morning.

Question 5.The first two words are related in a particular manner. Select the word from given choices, which is related to third one in the same manner :
GRAIN:SALT::blades:

Options:
a) glass
b) cut
c) grass
d) steel

Correct Answer: grass

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

Options:
a) distressed
b) helpless
c) underpriveleged
d) worse

Correct Answer: underpriveleged

Question 7.Choose the appropriate word in the blank from the given alternatives.
They arrived at the conclusion only after _________ all possible avenues of research.

Options:
a) seeking
b) exploring
c) diagnosing
d) embarking

Correct Answer: exploring

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

Options:
a) Roofs
b) Rooes
c) Ries
d) Roofes

Correct Answer: Roofs

Question 9.Select one word which is closest in meaning to the statement in the question :
One who possesses many talents

Options:
a) Versatile
b) Nubile
c) Exceptional
d) Gifted

Correct Answer: Versatile

Question 10.Four parts of a sentence (P/Q/R/S) are given. Arrange them in the right order to produce a correct sentence : even when/are well
informed/people engaged in a conversation/their conversation may be dull P/ Q/ R/ S

Options:
a) QSPR
b) PRQS
c) SRQP
d) SQRP

Correct Answer: PRQS

Question 11.In India Tropic of Cancer does not pass through which of the state

Options:
a) Roofs
b) Rooes
c) Ries
d) Roofes

Correct Answer: Roofs

Question 9.Select one word which is closest in meaning to the statement in the question :
One who possesses many talents

Options:
a) Versatile
b) Nubile
c) Exceptional
d) Gifted

Correct Answer: Versatile

Question 10.Four parts of a sentence (P/Q/R/S) are given. Arrange them in the right order to produce a correct sentence : even when/are well
informed/people engaged in a conversation/their conversation may be dull P/ Q/ R/ S

Options:
a) QSPR
b) PRQS
c) SRQP
d) SQRP

Correct Answer: PRQS

Question 11.In India Tropic of Cancer does not pass through which of the state

Options:
a) Madhya Pradesh 
b) Maharastra
c) Gujarat
d) Chatissgarh

Correct Answer: Maharastra 

Question 12.Lowest Literacy state in India, as per 2011 Census 2011 

Options:
a) Telangana
b) Bihar
c) Rajasthan
d) Arunachal Pradesh

Correct Answer: Bihar

Question 13.The instrument used for measuring the Purity/ Density or richness of Milk is 

Options:
a) Glucometer
b) Hydrometer
c) Spectrometer 㺈
d) Lactometer

Correct Answer: Lactometer

Question 14.Who is the founder of Art of Living concept

Options:
a) Sri sri Ravi Shankar
b) Baba Ramdev
c) Morari Bapu
d) Aasaram Bapu

Correct Answer: Sri sri Ravi Shankar

Question 15.The Secretariat of SAARC is located at : SAARC

Options:
a) Colombo
b) Kathmandu
c) Dhaka
d) New Delhi

Correct Answer: Kathmandu

Question 16.What is dry ice?

Options:
a) frozen ammonia
b) frozen carbon monoxide
c) frozen carbon dioxide
d) frozen hydrogen oxide

Correct Answer: frozen carbon dioxide

Question 17.Brightest planet of our solar system is

Options:
a) Mars 
b) Venus
c) Jupiter
d) Mercury

Correct Answer: Venus 

Question 18.Decimal system of number originated in ?

Options:
a) Greece
b) Germany
c) China
d) India

Correct Answer: India Question

19.Which one among the following is a source of renewable energy?

Options:
a) Wood
b) Fossil fuel
c) Wind power
d) Coal

Correct Answer: Wind power

Question 20.Which one of the following pairs is incorrect? 

Options:
a) Jeev Milkha Singh ­ Golf
b) Irfan Pathan ­ Cricket
c) Sania Mirza ­ Badminton
d) Saba Anjum­Hockey

Correct Answer: Sania Mirza ­ Badminton

Question 21.Let A and B be non–singular square matrices of the same order. Consider the following statements.

I. (AB)T = ATBT
II. (AB)­1 =B­1A­1
III. adj(AB) = (adj.A)(adj.B)
IV. ρ(AB)= ρ(A) ρ(B)
V. |AB| = |A|.|B|

Which of the above statements are false?

Options:
a) I, III & IV
b) IV & V
c) I & II
d) All of these

Correct Answer: I, III & IV Question

22.

Options:
a) Log (e x ­ 1)
b) Log (1 ­ e x )
c) Log (e ­x ­ 1)
d) Log (1 ­ e ­x )

Correct Answer: Log (1 ­ e ­x )

Question 23.The divergence of vector xi+yj+zk is

Options:
a) i+j+k
b) 3
c) 0
d) 1 AglaSem

Career Correct Answer: 3

Question 24.The transpose of the Co­factor Matrix is called

Options:
a) Adjoint matrix
b) Skew symmetric matrix ̾
c) Co­factor matrix
d) None of these

Correct Answer: Adjoint matrix

Question 25.∫π/2 0 (log tanx) dx equal to ∫π/2 0 (log tanx) बराबर है:

Options:
a) π/2loge2
b) π/2loge2
c) π/2loge2
d) 0

Correct Answer: 0

Question 26.Every diagonal element of a skew­symmetric matrix is

Options:
a) 1
b) 0
c) Purely real
d) None of these

Correct Answer: 0

Question 27.Which one of the following ia an analytic function

Options:
a) f(z)=sinz
b) f(z)=z
c) f(z)=Rz
d) f(z)=Im(z)

Correct Answer: f(z)=sinz

Question 28.Differential equation are equations that involve ____________ Variables and their ___________ with respect to the ____________ variables.

Options:
a) dependent, derivatives, independent
(dependent, derivatives, independent)
b) independent, derivatives, independent
(independent, derivatives, independent)
c) dependent, derivatives, dependent
(dependent, derivatives, dependent)
d) none of these

Correct Answer: dependent, derivatives, independent
(dependent, derivatives, independent)

Question 29.The Fourier Transformation of a sine wave is

Options:
a) Straight line parallel to X axis
b) Straight Line parallel to Y Axis
c) A Sine Wave
d) Line Passing throug (0,0)

Correct Answer: Straight Line parallel to Y Axis

Question 30.First Order Differentation of any funtion at a point is

Options:
a) Slope of Perpendicular to function at that point
b) Slope of tangent to function at that point
c) Value of funtion at that point
d) None of these

Correct Answer: Slope of tangent to function at that point

Question 31.The function ƒ(x) = 3x(x­2) has :

Options:
a) minimum at x=1
b) maximum at x=1
c) minimum at x=2
d) maximum at x=2

Correct Answer: minimum at x=1

Question 32.

Options:
a) ­1/9 log (4+9) + e
b) 1/9 log (4+9) + e
c) ­1/9 log (4+9) ­ e
d) none

Correct Answer: none

Question 34.∫ sec 3x tan 3x dx =

Options:
a) 1/3 sec 3 x + c
b) ­1/3 sec 3 x + c
c) 1/3 sec x
2 + c
d) none

Correct Answer: 1/3 sec x
2 + c

Question 35.∫ sin 2 3x dx =

Options:

Question 36.

Options:
a) a=2
b) a=1
c) a = ­2
d) a = ­1

Correct Answer: a=2

Question 37.If the vectors 2i­3j+k , 3i+xj+k are orthogonal then x= 2i­3j+k , 3i+xj+k

Options:
a) 2
b) 4
c) ­2
d) 1

Correct Answer: 4

Question 38.Find the angle between two vectors a and b with magnitudes √3 and 2 respectively having a.b=√6
√3 and 2

Options:
a) 45°
b) 90°
c) 180°
d) 30°

Correct Answer: 45°

Question 39.Uranium ( Z= 92, A= 238) emits a particle. The product has A and Z ­

Options:
a) 236, 92
b) 234,90
c) 238,90
d) 236,90

Correct Answer: 234,90

Question 40.Most penetrating radiation of radioactive element is ­

Options:
a) α rays
b) γ rays
c) β rays
d) X rays

Correct Answer: γ rays

Question 41.Any length of transmission line may be made to appear as an infinitely long line by

Options:
a) leaving the line open at the end
b) increasing the standing wave ratio above unity
c) shorting the line at the end
d) terminating the line in its characteristic impedance

Correct Answer: terminating the line in its characteristic impedance

Question 42.Which of the follwing can be used to measures rms, peak and averge value of an a.c voltage ?

I) Hotwire instrument.
II) Rectifer instrument.
III) Megger.
IV) CRO

Options:
a) I and II only
b) II and III Only
c) III Only
d) IV Only

Correct Answer: IV Only

Question 43.Flux meter uses which of the following effect

Options:
a) Magnet effect
b) Induction Effect
c) Hall Effect
d) electrical effect

Correct Answer: Hall Effect

Question 44.The Q­meter works on the principle of

Options:
a) mutual inductance 㹬
b) self inductance
c) series resonance
d) parallel resonance

Correct Answer: series resonance

Question 45.A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen

Options:
a) half of the image will disappear
b) image will not form on the screen
c) intensity of image will increase
d) intensity of image will decrease

Correct Answer: intensity of image will decrease

Question 46.A stone is dropped in a well and splash is heard after 1.5 seconds after the stone hits the surface. If the velocity of sound is 327 m/s, the depth of well is

Options:
a) 218 m
b) 227 m
c) 490.5 m
d) None of these

Correct Answer: 490.5 m

Question 47.A cinema Hall has volume of 7500 m³

 It is required to have reverberation time of 1.61 seconds. The total absorption in the hall should be _______ (consider 0.161 as multiplication factor in the relavent formula)

Options:
a) 7500 sabians
b) 750 sabians
c) 1980W ­ m2
d) 995 OWU

Correct Answer: 995 OWU

Question 48.Potential Difference is

Options:
a) Scalar Quantity
b) Vector Quantity
c) Both Scalar Quantity & Vector Quantity
d) None of these

Correct Answer: Scalar Quantity

Question 49.Light will undergo a path difference of lamda/2

Options:
a) glass­air
b) glass­water
c) glass­diamond
d) air­alcohol

Correct Answer: glass­diamond

Question 50.Visible spectrum lies between

Options:
a) radio waves and micro waves
b) infrared spectrum and ultraviolet rays
c) microwaves and infrared spectrum
d) x­ rays and gamma rays

Correct Answer: microwaves and infrared spectrum

Question 51.Laser is a device for

Options:
a) production of beam of white light
b) producing a beam of nonchromatic light
c) producing a beam of high intensity rays
d) producing a beam of highly penetrating x­rays

Correct Answer: producing a beam of high intensity rays

Question 52.The phenomenon of resonance is used in

Options:
a) radio
b) capacitor
c) transformer
d) amplifier

Correct Answer: radio

Question 53.Unit of wave length is

Options:
a) λ
b) meter
c) μs­1
d) second

Correct Answer: μs­1

Question 54.The intra molecular attraction in solids is

Options:
a) low
b) the greatest
c) nil
d) fairly good

Correct Answer: the greatest

Question 55.Very small­time intervals are accurately measured by the

Options:
a) Pulsars
b) White dwarfs
c) Atomic clocks
d) Quartz clocks

Correct Answer: Atomic clocks

Question 56.Waves traveling through a solid medium are _____

Options:
a) Transverse waves
b) Longitudinal waves
c) either of the both
d) None

Correct Answer: either of the both

Question 57.A 680 Ω load resistor RL, is connected across a constant current source of 1.2 A. The internal source resistance, RS, is 12 k Ω . The load current
through RL, is

Options:
a) 12 A
b) 1.2 A
c) 114 mA
d) 1.14 A

Correct Answer: 1.14 A

Question 58.A battery has a short circuit current of 30 A and open circuit voltage of 24 V. If the battery is connected to an electric bulb of resistance 2 Ω, the power
dissipated by the bulb is

Options:
a) 80 W
b) 1800 W
c) 112.5 W
d) 228 W

Correct Answer: 112.5 W

Question 59.While thevenizing a circuit between two terminals,Vth equals

Options:
a) short circuit terminal voltage
b) open circuit terminal voltage
c) EMF of the battery nearest to the terminals
d) net voltage available in the circuit

Correct Answer: open circuit terminal voltage

Question 60.While calculating thevenin resistance (Rth) ,constant­current sources in the circuit are

Options:
a) replaced by 'opens'
b) replaced by 'shorts'
c) treated in parallel with other voltage sources
d) converted into equivalent sources

Correct Answer: replaced by 'opens'

Question 61.Ampere second could be the unit of

Options:
a) power
b) conductance
c) energy
d) charge

Correct Answer: charge

Question 62.The above results were obtained from measurements taken between the two terminal of a resistive network . The Thevenin resistance of the network is

Options:
a) 16 Ω
b) 8 Ω
c) 0
d) ∞

Correct Answer: 8 Ω

Question 63.For the circuit find the equivalent thevenin's volatge and resistance

Options:
a) 100V , 75 Ω
b) 100V , 55 Ω
c) 155V , 75 Ω
d) 155V , 55 Ω

Correct Answer: 155V , 55 Ω
 

Question 64.In a network consisting of linear resistors and ideal voltage source, if the value of resistors are doubled, then voltage across each resistor

Options:
a) increases 4 times
b) remains unchanged
c) doubled
d) reduced to half value

Correct Answer: remains unchanged

Question 65.The rms value of the current in a wire which carries a d.c. current of 10 A and a sinusoidal alternating current of peak value 20 A is

Options:
a) 10A
b) 14.14A
c) 17.32A
d) 15A

Correct Answer: 17.32A

Question 66.Four 100 W bulbs are connected in parallel across 200V supply line. If one bulb gets fused then :

Options:
a) no bulb will light
b) all the four bulbs will light
c) rest of the three bulbs will light
d) None of these

Correct Answer: rest of the three bulbs will light

Question 67.Petroleum jelly is applied to the terminals of the lead acid battery in order to prevent

Options:
a) corrosion
b) local heating
c) short­circuiting
d) all of these

Correct Answer: corrosion

Question 68.A fuse is provided in an electric circuit for

Options:
a) safeguarding the installation against heavey current
b) reducing the current flowing in the circuit
c) reducing the power consumption
d) All of these

Correct Answer: safeguarding the installation against heavey current

Question 69.A 60% lagging power factor implies that the load is

Options:
a) inductive
b) capacitive
c) inductive or capacitive
d) resistive

Correct Answer: inductive

Question 70.________ is a unit used in radio astronomy to measure the strength (flux density) of radio signals from space

Options:
a) Amp
b) Jansky
c) Hertz
d) Knot

Correct Answer: Jansky

Question 71.Nortan's Theorem results in

Options:
a) a Current source with an impedance in Parallel
b) a Voltage source with an impedance in series
c) a Voltage source alone
d) a Current source alone

Correct Answer: a Current source with an impedance in Parallel

Question 72.An ideal voltage source will charge an ideal capacitor

Options:
a) in Infinite time
b) Exponentially
c) Instantaneously
d) None of these

Correct Answer: Instantaneously

Question 73.Reluctance in Magnetic circuits is analogues to ____________in electric circuit

Options:
a) Resistance
b) Voltage
c) current
d) Power

Correct Answer: Resistance

Question 74.Two capacitors of 2 μF and 3μF are connected in series across 10V. The potential difference across the 2 μF capacitor will be

Options:
a) 4V
b) 6V
c) 10V
d) 0V

Correct Answer: 6V

Question 75.If you need to design a relaxation oscillator circuit. The most likely device to use might be

Options:
a) a SCR
b) a UJT
c) a Triac
d) All of these

Correct Answer: a UJT

Question 76.The ripple factor of a power supply is a measure of

Options:
a) its filter efficiency
b) its voltage regulation
c) diode rating
d) purity of power output

Correct Answer: its filter efficiency

Question 77.Crossover distortion occurs in

Options:
a) push­pull amplifiers
b) class a amplifiers
c) class B amplifiers
d) class AB amplifiers

Correct Answer: push­pull amplifiers

Question 78.The maximum number of electrons which the valence shell of an atom can have is

Options:
a) 6
b) 8
c) 18
d) 2

Correct Answer: 8

Question 79.Doping materials are called impurities because they

Options:
a) decrease the number of charge carriers
b) change the chemical properties of semiconductors
c) make semiconductors less than 100 percent pure
d) alter the crystal structures of pure semiconductors

Correct Answer: alter the crystal structures of pure semiconductors

Question 80.In a PNPN diode, breakover condition is marked by

Options:
a) a sudden decrease in current
b) a sudden increase in current
c) diode getting burnt off
d) a sudden glow taking place

Correct Answer: a sudden increase in current

Question 81.In an amplifier, the output current flows for 200° of input cycle. The class of operation of the amplifier is

Options:
a) A
b) AB
c) B
d) C

Correct Answer: AB

Question 82.In an PN junction depletion layer is created due to

Options:
a) Diffusion of ions
b) Diffusion of Minority carriers
c) Diffusion of Majority carriers
d) Diffusion of Minority & Majority carriers

Correct Answer: Diffusion of Majority carriers

Question 83.In a schmitt Trigger UTP=12V, LTP=8V, the hysterises VH is

Options:
a) 12V
b) 8V
c) 4V
d) 20V

Correct Answer: 4V

Question 84.In a transistor, β may be expressed in terms of α as below:

Options:
a) α/1­α
b) α/1+α
c) 1+α/α
d) 1­α/α

Correct Answer: α/1­α

Question 85.Input resistances Ri of ideal voltage amplifier and ideal current amplifier are respectively

Options:
a) ∞, 0
b) 0, ∞
c) ∞, ∞
d) 0, 0

Correct Answer: ∞, 0

Question 86.In a class AB amplifier with sinusoidal input signal, the output current flows for

Options:
a) half the cycle
b) full cycle
c) less than half cycle
d) more than half cycle

Correct Answer: more than half cycle

Question 87.The 3­dB frequency of an amplifier is one at which gain reduces to

Options:
a) unity
b) zero
c) 1/√2 of its midband value
d) half of its midband value

Correct Answer: 1/√2 of its midband value

Question 88.In a single tuned capacitance coupled amplifier, the frequency response depends on

Options:
a) only the input circuit
b) only the output circuit
c) both input and output circuits
d) neither input circuit nor the output circuit

Correct Answer: only the output circuit

Question 89.Monostable multvibrator may be used to generate

Options:
a) sweep voltage
b) pulses
c) sinusoidal voltage
d) sweep current

Correct Answer: pulses

Question 90.The maximum ac power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transformer used?

Options:
a) 10 W
b) 15 W
c) 5 W
d) 20 W
AglaSem Career

Correct Answer: 20 W

Question 91.If a high degree of selectivity is desired, then double­tuned circuit should have

Options:
a) Loose coupling
b) Tight coupling
c) Critical coupling
d) none of these

Correct Answer: Loose coupling

Question 92.A semiconductor has _________ temperature coefficient of resistance

Options:
a) Positive
b) Zero
c) Negative
d) None of these

Correct Answer: Negative

Question 93.The Boolean function Y = AB + CD is to be realized using only 2 ­input NAND gates. The minimum number of gates required is­

Options:
a) 2
b) 3
c) 4
d) 5

Correct Answer: 3

Question 94.Which of the following Boolean Expressions correctly represents the relation between P, Q, R and M1

Options:
a) M1 = (P OR Q) XOR R
b) M1 = (P AND Q)X OR R
c) M1 = (P NOR Q)X OR R
d) M1 = (P XOR Q) XOR R

Correct Answer: M1 = (P XOR Q) XOR R

Question 95.If the input to the digital circuit (in the figure) consisting of a cascade of 20 XOR ­ gates is X, then the output Y is equal to­

Options:
a) 0
b) 1
c) X̄
d) X

Correct Answer: 1

Question 96.A sequential circuit using D flip­flop and logic gates is shown in the figure, where X and Y are the inputs and Z is the output . The circuit isD

Options:
a) S ­ R Flip­Flop with inputs X = R and Y = S
b) S ­ R Flip­Flop with inputs X = S and Y = R
c) J ­ K Flip­Flop with inputs X = J and Y = K
d) J ­ K Flip­Flop with input X = K and Y = J

Correct Answer: J ­ K Flip­Flop with input X = K and Y = J

Question 97.A ring counter consisting of five flip­flops will have

Options:
a) 5 states
b) 10 states
c) 32 states
d) infinite states

Correct Answer: 5 states

Question 98.Which one of the following logic families can be operated using supply voltage from 3V to 15 V ?

Options:
a) TTL
b) ECL
c) PMOS
d) CMOS

Correct Answer: CMOS

Question 99.USB Flash Drive ( USB Memory stick / Pen drive) is

Options:
a) SRAM
b) DRAM
c) Volatile Memory
d) Non­Volatile memory

Correct Answer: Non­Volatile memory

Question 100.NOR Gate is equal to

Options:
a) OR Gate with negated inputs
b) NAND gate with negated output
c) NAND gate with negated input
d) None of these

Correct Answer: NAND gate with negated input

Question 101.The charge of an electron is :

Options:
a) 1.6 x 10­17 Coulomb
b) 1.6 x 10­19 Coulomb
c) 1.6 x 10­21 Coulomb
d) 1.6 x 10­23 Coulomb

Correct Answer: 1.6 x 10­19 Coulomb

Question 102.Oscillators are widely used in

Options:
a) radio broadcasting
b) television broadcasting
c) radio and television recieiver
d) All of these

Correct Answer: All of these

Question 103.264 का दशमलव तु癰Ā है:

Options:
a) 180
b) 170
c) 166
d) none

Correct Answer: 170

Question 104.Which of the following circuit can be used as parallel to serial convertor

Options:
a) digital counter
b) decoder
c) demultiplexer
d) multiplexer

Correct Answer: multiplexer

Question 105.A string of 4 bits is called as

Options:
a) Bit
b) Byte
c) Word
d) Nibble

Correct Answer: Nibble

Question 106.When the Input to a seven segment decoder is "0100" the number on display will be

Options:
a) 0
b) 2
c) 4
d) 9

Correct Answer: 4

Question 107.Which of the following hexadecimal numbers represents an odd decimal number

Options:
a) FF
b) EG
c) CC
d) AA

Correct Answer: FF

Question 108.Half­adder is also known as

Options:
a) AND circuit
b) NAND circuit
c) NOR circuit
d) EX­OR circuit

Correct Answer: EX­OR circuit

Question 109.Logic 1 in positive logic system is represented by

Options:
a) zero level
b) lower voltage level
c) higher voltage level
d) negative voltage

Correct Answer: higher voltage level

Question 110.Which of the following logic circuits accepts two binary digits on its inputs and produce

Options:
a) full adder
b) half adder
c) decoder
d) multiplexer

Correct Answer: half adder

Question 111.Major disadvantage of using three sets of SCRs for variable voltage speed control of a SCIM is the ­

Options:
a) Considerable I2R loss
b) Poor power factor
c) Long delay of thyristor firing pulses
d) Necessity of using a processor

Correct Answer: Considerable I2R loss

Question 112.Which of the following connection is best suited for 3 phase 4 wire service?

Options:
a) Δ­Δ
b) Y­Y
c) Δ­Y
d) Y­Δ

Correct Answer: Δ­Y

Question 113.For the three­phase circuit shown in the figure the ratio of the currents IR IYI I B is given by

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

Correct Answer: 1:1:√3

Question 114.A transformer transforms

Options:
a) frequency
b) voltage
c) current
d) voltage and current

Correct Answer: voltage and current

Question 115.Delta/star or star/delta transformation technique is applied to

Options:
a) one terminal network
b) two terminal network
c) three terminal network
d) none of these

Correct Answer: three terminal network

Question 116.The resonance frequency w of RLC circuit is defined as

Options:
a) Sqrt(LC)
b) 1/Sqrt(LC)
c) Sqrt(R/LC)
d) Sqrt(LC/R)

Correct Answer: 1/Sqrt(LC)

Question 117.Trickle charging of storage battery helps to __________

Options:
a) prevent sulphation
b) keep it fresh and fully charged
c) maintain proper electrolyte level
d) increase its reserve capacity

Correct Answer: keep it fresh and fully charged

Question 118.The main purpose of using core in a transformer is to _____________

Options:
a) decrease iron losses
b) prevent eddy current
c) decrease reluctance of the common magnetic circuit
d) eliminate magnetic hysteresis

Correct Answer: decrease reluctance of the common magnetic circuit

Question 119.In a synchronous machine, in case the axis of field flux is in line with the armature flux then ______________

Options:
a) the machine is working as synchronous motor
b) the machine is working as synchronous generator
c) the machine is said to be floating
d) the machine will vibrate violently

Correct Answer: the machine is said to be floating

Question 120.Which of the following pair is used for frequency converter ?

Options:
a) Squirrel cage induction motor and synchronous motor
b) Wound rotor induction motor and synchronous motor
c) wound rotor induction motor and squirrel cage induction motor
d) Any of these

Correct Answer: Squirrel cage induction motor and synchronous motor

Question 121.The direction of rotation of d.c. motor can be reversed by_______

Options:
a) reversing the connections of both armature and the field winding
b) reversing the connection of either the armature or field winding
c) reducing the field flux
d) introducing extra resistance in the armature circuit

Correct Answer: reversing the connection of either the armature or field winding

Question 122.In order to achieve all day efficiency in a transformer

Options:
a) The copper losses should be less
b) The operating temperature should be low
c) The shell type construction should be used
d) The iron losses should be less

Correct Answer: The copper losses should be less

Question 123.The surge impedance value of overhead lines is

Options:
a) 50 to 100 ohms
b) 400 to 600 ohms
c) 800 to 1000 ohms
d) 10 to 50 ohms

Correct Answer: 800 to 1000 ohms

Question 124.What is the beamwidth between nulls of a 2­m paraboloid reflector used at 6 GHz?

Options:
a) 7 degrees
b) 3.5 degrees
c) 1.75 degrees
d) 5 degrees

Correct Answer: 3.5 degrees

Question 125.A 1 mW signal having a bandwidth of 100 MHz is transmitted to a receiver through cable that has 40 dB loss. If the effective one­side noise spectral density at the receiver is 10­20 Watt/Hz, then the signal to noise ratio at the receiver is ­

Options:
a) 50 dB
b) 30 dB
c) 40 dB
d) 60 dB

Correct Answer: 50 dB

Question 126.The pre­emphasis circuit is used

Options:
a) After modulation
b) prior to modulation
c) to increase or emphasis the amplitude of low frequency components of the signal
d) None of these

Correct Answer: prior to modulation

Question 127.Microwave MB_Communication uses_________ amplifier to obtain large gain over wide bandwidth

Options:
a) Reflex Klystron
b) Pi­Mode Magnetron
c) Travelling wave Tube
d) All of these

Correct Answer: Travelling wave Tube

Question 128.Boosting of higher audio frequencies in FM to improve noise immunity is called

Options:
a) De­Emphasis
b) Pre­emphasis
c) Compression
d) Expansion

Correct Answer: Pre­emphasis

Question 129.In an FM system, when the AF is 500 Hz and the AF voltage is 2.4 V, the deviation is 4.8 kHz. If the AF voltage is now increased to 7.2 V, the new deviation will be

Options:
a) 4.8 KHz
b) 9.6 KHz
c) 14.4 KHz
d) 28.8 KHz

Correct Answer: 14.4 KHz

Question 130.When a broadcast AM transmitter is 50 % modulated, its antenna current is 12 A. What will be the current when the modulation depth is increased to
90% ?

Options:
a) 13.4 A
b) 12.9 A
c) 16.6 A
d) 21.8 A
AglaSem Career

Correct Answer: 13.4a

Question 131.Which of the following has the least wave length ?

Options:
a) Ultra­violet
b) UHF
c) Infra­red
d) X­rays

Correct Answer: X­rays

Question 132.Under which of the following situations, fading will not occur ?

Options:
a) the frequency of the signal is high
b) A single sky wave is present
c) Many sky waves arrive by different path
d) None of these

Correct Answer: None of these

Question 133.Which of the following frequency bands fall under microwave frequency

Options:
a) UHF and SHF
b) SHF and EHF
c) VLF, LF and MF
d) UHF, SHF and EHF

Correct Answer: UHF, SHF and EHF

Question 134.One dit is equal to ___________

Options:
a) 1.14 bits
b) 3.32 bits
c) 1.17 bits
d) none of these

Correct Answer: 3.32 bits

Question 135.Speech signal frequency may lies between

Options:
a) 0­15 Khz
b) 15 Hz to 15 KHz
c) 1­50 KHz
d) 0­1 MHz

Correct Answer: 0­1 MHz

Question 136.Indicate which of the following system is digital

Options:
a) PPM
b) PCM
c) PWM
d) PFM

Correct Answer: PCM

Question 137.An ideal filter should have

Options:
a) Infinite attenuation in the attenuation band.
b) Infinite attenuation in the pass band
c) Zero attenuation in the attenuation band.
d) Zero attenuation in the pass band

Correct Answer: Zero attenuation in the pass band

Question 138.A line becomes distortion less if

Options:
a) It is properly matched
b) LG=CR
c) LC=GR
d) It is terminated into Zo

Correct Answer: LG=CR

Question 139.A network is said to be reciprocal if

Options:
a) Z12=Z21
b) Y12=Y21
c) AD­BC=1
d) all of these

Correct Answer: all of these

Question 140.Attenuators are used

Options:
a) to increase the signal level
b) to reduce the signal level
c) to maintain the signal level constant
d) None of these

Correct Answer: to reduce the signal level

Question 141.The intrinsic impedance of free space is

Options:
a) 75Ω
b) 37Ω
c) 377Ω
d) 3670Ω

Correct Answer: 377Ω

Question 142.What is the characteristic impedance of the transmission line of inductance 144 H/m and capacitance of 100 F/m

Options:
a) 12Ω
b) 14Ω
c) 1.2Ω
d) 120Ω

Correct Answer: 1.2Ω

Question 143.The Characteristic Impedance of a low pass filter in attenuation Band is

Options:
a) Complex quantity.
b) Real value.
c) Zero
d) Purely imaginary.

Correct Answer: Purely imaginary.

Question 144.LDAP works on the ________ layer of OSI Model

Options:
a) Physical
b) Network
c) Data Link
d) Transport

Correct Answer: Data Link

Question 145.With every increase in 3 dB of power level

Options:
a) The power becomes half
b) Power increases by one unit
c) Power reduces by one unit
d) Power becomes double

Correct Answer: Power becomes double

Question 146.The impact of rains on microwave communication is higher in

Options:
a) Lower Frequency Range
b) Medium Frequency Range
c) No Impact at all
d) Higher Frequency Ranges

Correct Answer: No Impact at all

Question 147.For transmission matching over a range of frequencies, it is best to use a ___________

Options:
a) single stub of adjustable position
b) double stub
c) broadband directional coupler
d) balun

Correct Answer: double stub

Question 148.A 50 watt light bulb burns an average of 10 hrs a day for one week. The total kilowatt hour consumption is

Options:
a) 3.5
b) 35
c) 0.35
d) 0.035

Correct Answer: 0.35

Question 149.A 12 V battery with an internal resistance 0.5 ohms feeds a series circuit containing 20 ohms, 10 ohms, and R. Find the value of R if the current in the
circuit is 0.2A.

Options:
a) 14.5 ohms
b) 15.5 ohms
c) 4.5 ohms
d) 5.5 ohms

Correct Answer: 15.5 ohms

Question 150.An ammeter has a current range of 0­5 A, and its internal resistance is 0.2 Ω. In order to change the range to 0­25 A, we need to add a resistance of

Options:
a) 0.05 Ω in parallel with the meter
b) 0.04 Ω in parallel with the meter
c) 1.0 Ω in series with the meter
d) 0.8 Ω in series with the meter

Correct Answer: 0.05 Ω in parallel with the meter

Question 151.A device used to display one or more digital signals so that they can be compared to expected timing diagrams for the signals is a

Options:
a) DMM
b) Spectrum analyzer
c) Logic Analyzer
d) Frequency counter

Correct Answer: Logic Analyzer

Question 152.An LVDT is used to measure displacement. The LVDT feeds a volmeter of 0­5 V range through a 250 gain amplifier. For a displacement of 0.5mm the
output of LVDT is 2mV. The sensitivity of instrument is

Options:
a) 0.1 V/mm
b) 0.5 V/mm
c) 1 V/mm
d) 5 V/mm

Correct Answer: 1 V/mm

Question 153.The measure of mismatch between the load and the transmission line is known as __________

Options:
a) directivity
b) (I­gain)
c) reflection coefficient
d) standing wave ratio

Correct Answer: reflection coefficient

Question 154.A galvanometer has _________

Options:
a) air friction damping
b) fluid friction damping
c) eddy current damping
d) spring coil damping

Correct Answer: eddy current damping

Question 155.Thermocouples are _____

Options:
a) passive transducers
b) both active and passive transducers
c) output transducers
d) active transducers

Correct Answer: active transducers

Question 156.Dummy strain guages are used for _______________

Options:
a) calibration of strain gauges
b) increasing the sensitivity of bridge in which they are included
c) compensating for different expansion
d) compensation of temperature changes

Correct Answer: compensation of temperature changes

Question 157.A meter connected in parallel with a component to measure ___

Options:
a) Voltage
b) Current
c) Power
d) None

Correct Answer: None

Question 158.When the D.C. Voltmeter is connected with polarities reversed

Options:
a) The pointer deflects upscale
b) The pointer deflects downscale
c) The pointer remains stationery
d) None

Correct Answer: The pointer deflects upscale

Question 159.Voltmeter sensitivity is defined by

Options:
a) Volt/ohm
b) Volt/ohm2
c) Ohm/volt
d) Ohm/volt2

Correct Answer: Ohm/volt2

Question 160.An oscilloscope indicates:

Options:
a) Peak to peak value of voltage
b) DC value of voltage
c) Average value of a A.C. voltage
d) RMS value of a A.C. voltage

Correct Answer: RMS value of a A.C. voltage

Question 161.Which of the instrument is used for a.c. and d.c.

Options:
a) moving iron (attraction type) ammeter
b) moving iron (repulsion type) voltmeter
c) permanent magnet type ammeter
d) induction type meter

Correct Answer: permanent magnet type ammeter

Question 162.A high Q coil has a

Options:
a) high band width
b) low power factor
c) high losses
d) a flat response

Correct Answer: low power factor

Question 163. A Lag network for compensation normally consists of ­

Options:
a) R, L and C elements
b) R and L elements
c) R and C elements
d) R only

Correct Answer: R and C elements

Question 164. The pole–zero plot given in fig. below is that of a­

Options:
a) PID controller
b) PD controller
c) Integrator
d) Lag–lead compensating network

Correct Answer: Lag–lead compensating network

Question 165.The impulse response of a LTI system is a unit step function, then the corresponding

Options:
a) 1/s
b) s
c) 2s
d) 0

Correct Answer: 1/s

Question 166.Determine the range of K for stability of unity feedback system whose open loop transfer function is G(s)=K/s(s+1)(s+2)

Options:
a) 10
b) 15
c) 6
d) 0

Correct Answer: 0

Question 167.The unity feedback control system has a forward path transfer funtion equal to 42.25/s(s+6.5). The unit step response of this system starting from rest,
will have its maximum valute at a time equal to

Options:
a) 0 sec
b) 0.56 sec
c) 5.6 sec
d) infinity

Correct Answer: infinity

Question 168.Peak time tp
, is the time required for the response to reach the ______ peak of the over shoot

Options:
a) 1st
b) 2nd
c) 3rd
d) none of these

Correct Answer: 1st

Question 169.Which of the following is the analogous pair under force current analogy?

Options:
a) Mass­inductance
b) Force­capacitance
c) Displacement­charge
d) Viscous friction co­efficient­reciprocal of resistance 汼Āानता घष⻆ण

Correct Answer: Viscous friction co­efficient­reciprocal of resistance 汼Āानता घष⻆ण

Question 170.The negative real axis of Nyquist plot corresponds to the _____

Options:
a) a negative 180 degree phase line of Bode plot
b) a positive 180 degree phase line of Bode plot
c) 0 db line Bode plot
d) none of these

Correct Answer: a negative 180 degree phase line of Bode plot

Question 171.With feedback system _______________

Options:
a) the transient response gets magnified
b) transient response decays at a constant rate
c) the transient response decays slowly
d) the transient response decays more quickly

Correct Answer: the transient response decays slowly

Question 172.A regulator that contains four phase lags at t1
sec, t2 = 0.1 sec, t3
, t4 = 0.01 sec, is stable if its steady state gain is __________

Options:
a) 10 db
b) 30 db
c) 20 db
d) none of these

Correct Answer: 20 db

Question 173.The ideal amplifier takes current from the input source as

Options:
a) In milliampere
b) Zero
c) In ampere
d) In mega­ampere

Correct Answer: In ampere

Question 174.The system response can be tested with

Options:
a) Sinusoidal input signal
b) Unit impulse input signal
c) Ramp input signal
d) Exponentially decaying signal

Correct Answer: Ramp input signal

Question 175.In a critically damped system, the damping factor of the system is

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

Correct Answer: less than unity

Question 176.The minimum number of MOS tranistors required to make a dynamic RAM cell is

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

Correct Answer: 1

Question 177.The number of status flag present in 8085 are

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

Correct Answer: 5

Question 178.The range of address where the Interrupt service procedures are stored is

Options:
a) 00000 ­ 000FFH
b) 00000 ­ 001FFH
c) 00000 ­ 002FFH
d) 00000 ­ 003FFH

Correct Answer: 00000 ­ 003FFH

Question 179.FAR CALL or FAR JUMP is to branch if program area is outside ________segment in 8086

Options:
a) 4KByte
b) 16KByte
c) 32KByte
d) 64KByte

Correct Answer: 64KByte

Question 180.The output resistance of a voltage source is 4 ohm. Its internal resistance will be

Options:
a) 4 ohm
b) 2 ohm
c) 1 ohm
d) infinite

Correct Answer: 4 ohm

Question 181.Normally Internet traffic is measured in

Options:
a) Volts
b) Mbps
c) Erlangs
d) Watts

Correct Answer: Mbps

Question 182.Computational circuitry in a CPU is reffered to as the ____________

Options:
a) ALU
b) Program Counter
c) ROM
d) RAM

Correct Answer: ALU

Question 183.Which of the following instructions are not used by the 8080 MPU ?

Options:
a) RIM, STA
b) SIM, STA
c) STA, XCHG
d) RIM, SIM

Correct Answer: RIM, SIM

Question 184.Decimal 15 equals ____ in binary.

Options:
a) 0111
b) 1111
c) 1011
d) 1101

Correct Answer: 1101

Question 185.Which of the following functions is not performed by a microprocessor?

Options:
a) Controlling timing of information flow.
b) Performing the computing tasks specified in a program
c) Communicating with all peripherals using system bus
d) Storing results and date

Correct Answer: Storing results and date

Question 186. The number of bytes in an instruction for 8085 can be

Options:
a) One or two
b) One, two or three
c) Two only
d) One only

Correct Answer: One only

Question 187.The memory addressing capacity of 8086 is

Options:
a) 32 KB
b) 64 KB
c) 1 Megabyte
d) 32 Megabyte

Correct Answer: 1 Megabyte

Question 188.In 8086, the physical address of an instruction contains _______ bits.

Options:
a) 10
b) 16
c) 18
d) 20

Correct Answer: 18

Question 189.Which of the following code will remove all the rows from the table LOCATIONS?
 

Options:
a) DROP TABLE LOCATIONS
b) DELETE TABLE LOCATIONS
c) TRUNCATE TABLE LOCATIONS
d) None of these

Correct Answer: TRUNCATE TABLE LOCATIONS

Question 190.Which protocol does DHCP use at the Transport layer?

Options:
a) IP
b) TCP
c) UDP
d) ARP

Correct Answer: UDP

Question 191.TCP port Number for http services is

Options:
a) 21
b) 22
c) 80
d) 88

Correct Answer: 80

Question 192.The Characteristic equation of T flip flop is

Options:
a) Q= T'Q+TQ'
b) Q=T'Q'+QT'
c) Q=TQ
d) Q=TQ'

Correct Answer: Q= T'Q+TQ'

Question 193.ASCII stands for

Options:
a) American standard code for information Interchange
b) American scientific code for information Interchange
c) American standard code for intelligent Interchange
d) American scientific code for intelligent Interchange

Correct Answer: American standard code for information Interchange

Question 194.The highest modulation frequency typically used in AM broadcast is

Options:
a) 5 KHz
b) 10 KHz
c) 15 KHz
d) 1 MHz

Correct Answer: 5 KHz

Question 195.In RC inductive reactance, FET is so arranged that

Options:
a) Xc>R
b) Xc
c) Xc=R
d) Xc=10 R

Correct Answer: Xc

Question 196.Which of the following operations is not performed by the CPU of a computer system ?

Options:
a) Arithmetic operation
b) Providing timing signal
c) control instruction processing
d) None of these

Correct Answer: Providing timing signal

Question 197.The data transfer rate of a double density floppy disc system is about ________

Options:
a) 5 Kbits/sec
b) 50 Kbits/sec
c) 500 Kbits/sec
d) 5000 Kbits/sec

Correct Answer: 500 Kbits/sec

Question 198.The decimal fraction 0.375 in binary form is ____________

Options:
a) 0.0011
b) 0.111
c) 0.011
d) 0.0111

Correct Answer: 0.011

Question 199.Hardware of the computer is

Options:
a) physical component
b) programing component
c) hard component
d) none of these

Correct Answer: programing component

Question 200._________ is a low level language

Options:
a) Fortran
b) Machine Language
c) binary
d) Pascal

Correct Answer: Fortran
 

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