20-07-2018 JUNIOR INSTRUCTOR-ELECTRONIC MECHANIC

JUNIOR INSTRUCTOR-ELECTRONIC MECHANIC,INDUSTRIAL TRAINING

EXAM DATE:20-07-2018

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1.What was the name of the horse of Shivaji?

A.Chetak

B.Kanthaka

C.Pancha Kalyani

D.Bousephallus

Ans:C

2.Which animal is known as “Living Fossil”>

A.Beaver

B.Legur

C.Tiger

D.Panda

Ans:D

3.Which of the following day observed as “World Asthma Day”in 2017?

A.June 23

B.May 2

C.December 18

D.October 13

Ans:B

4.Which blood group is without Antigen?

A.B

B.A

C.O

D.AB

Ans:C

5.The study of flags is known as

A.Terttology

B.Rynology

C.Polmology

D.Vexillology

Ans:D

6.Which year Malayali Memorial submitted?

A.1891

B.1896

C.1897

D.1900

Ans:A

7.Who was famous for woman activities of Kerala Mahila Desa Sevika Sangh?

A.Lalitha Prabhu

B.Arya Pallam

C.A.V.Kuttimalu Amma

D.Anna Chandi

Ans:A

8.The World Alzheimer’s day is observed on

A.October 21

B.August 29

C.September 21

D.September 14

Ans:C

9.Savithrikutty Adava Vidava Vivaham is a

A.Poem

B.Novel

C.Drama

D.Critic

Ans:C

10.Who founded Satya Shodhak Samaj?

A.Bhasker Rao Jadav

B.Gopal Deshmukh

C.Dayanand Saraswati

D.Jyotiba Phule

Ans:D

11.Who is known as “Grand Old man of India”?

A.Bankim Chandra Chatterji

B.Dadabhai Naoroji

C.Ram Mohan Roy

D.Madan Mohan Malaviya

Ans:B

12.”It was a post dated cheque on a crashing bank”-the statement related to

A.Communal Award

B.Wavell Plan

C.Cripps Mission

D.Cabinet Mission Plan

Ans:C

13.The Viceroy who forward the proposal of August Offer in 1940 was

A.Lord Wellington

B.Lord Linlithgow

C.Lord Dufferin

D.Lord Mayo

Ans:B

14.Who was the founder of Khudai Khitmadgar Organisation?

A.Shaukat Ali Ansari

B.Khan Abdul Qayyum Khan

C.Muhammed Ali Jinnah

D.Khan Abdul Gaffar Khan

Ans:D

15.The first secretary of S.N.D.P.Yogam:

A.Kumaranasan

B.Dr.Palpu

C.Sree Narayana Guru

D.Vellappilly Nadesan

Ans:A

16.The Perinad riot happened in

A.1911

B.1915

C.1913

D.1904

Ans:B

17.Baba Amte related to

A.Narmada Bachao Andolan

B.Chipko Movement

C.Bishnoi Movement

D.Garhwal Himalayas

Ans:A

18.Who wrote the book”Silent Spring”?

A.Robert Redford

B.Ralph Nader

C.Sunderlal Bahuguna

D.Rachel Carson

Ans:D

19.What is the name of the Atom bomb laid in Nagasaki on August 9^th 1945?

A.Litty boy

B.Fatty man

C.Little boy

D.Fat man

Ans:B

20.Which day is observed as Zero Emission Day?

A.21^st September

B.8^th June

C.12^th November

D.11^th July

Ans:A

21.A resistor with colour coded value of 1000 ohms and +-20% tolerance can have an actual resistance between

A.980 Ohm and 1020 Ohm

B.800 Ohm and 1000 Ohm

C.1000 Ohm and 1200 Ohm

D.800 Ohm and 1200 Ohm

Ans:D

22.For a carbon-composition resistor colour coded with Yellow,Violet,Orange and Silver stripes left to right,the resistance and tolerance are

A.470 Ohms+-5%

B.47 Kilo Ohm+-10%

C.47 Mega Ohms+-5%

D.4700 Ohms+-10%

Ans:B

23.Five Capacitors each of 5 Meu F are connected in parallel,the equivalent capacitance will be

A.25 Meu F

B.15 Meu F

C.1 Meu F

D.10 Meu F

Ans:A

24.The resistance of a conductor of diameter D and length L is R Ohm.If the Diameter of the conductor is halved and its length is doubled,the resistance will be

A.R Ohm

B.2R Ohm

C.4R Ohm

D.8R Ohm

Ans:D

25.The electrical energy consumed by a coil is stored in the form of:

A.An electrical field

B.A force field

C.An electrostatic field

D.A magnetic field

Ans:D

26.In a purely inductive circuit

A.Current leads voltage by 90 Degree

B.Voltage lags current by 90 Degree

C.Voltage leads current by 90 Degree

D.Voltage and Current are in Phase(Zero Degree)

Ans:C

27.A semiconductor has----------Valence Electrons.

A.5

B.6

C.4

D.3

Ans:C

28.The strength of a semiconductor crystal comes from------------

A.Forces between Protons

B.Forces between Nuclei

C.Electron-Pair Bonds

D.None of the above

Ans:C

29.If Doping level of a crystal diode is increased,the breakdown voltage-----------

A.Is increased

B.Is decreased

C.Remains the same

D.None of the above

Ans:B

30.A Zener diode has----------

A.One PN Junction

B.Two PN Junction

C.Three PN Junction

D.Four PN Junction

Ans:A

31.Fermi level for extrinsic semiconductor depends on

A.Donor Element

B.Impurity Concentration

C.Temperature

D.All of the above

Ans:D

32.What is the maximum power rating for light emitting diodes?

A.150 mW

B.300 mW

C.500 mW

D.5 mW

Ans:A

33.A Transistor is a -----------operated device.

A.Voltage

B.Current

C.Both Voltage and Current

D.None of the above

Ans:B

34.The Operation of JEFT involves

A.Flow of minority Carriers

B.Flow of majority Carriers

C.Recombination

D.None of the above

Ans:B

35.When transistors are used in digital circuits they usually operate in the:

A.Active Region

B.Saturation and Cutoff Regions

C.Breakdown Region

D.Linear Region

Ans:B

36.If a 2 mV signal produces a 2V output,what is the Voltage Gain?

A.0.001

B.100

C.1000

D.0.004

Ans:C

37.Least Distortion in the Output of a Power amplifier occurs in

A.Class A

B.Class B

C.Class AB

D.Class C

Ans:A

38.In a Class C Amplifier

A.Efficiency and distortion both are maximum

B.Efficiency and distortion both are minimum

C.Efficiency maximum but distortion minimum

D.Efficiency minimum but distortion maximum

Ans:A

39.The Cut in Voltage of  Germanium junction diode is

A.0.1V

B.0.3V

C.0.7V

D.1V

Ans:B

40.Which among the following does not belong to the category of LC oscillator?

A.Hartley oscillator

B.Colpitt’s oscillator

C.Wein bridge oscillator

D.Clapp oscillator

Ans:C

41.Why is the practical value of |A Beta|considered to be slightly greater than one in oscillators?

A.To compensate for non-linearities existing in the circuit

B.To compensate for phase shifting of two relevant signals upto 180 Degree.

C.To compensate for the change in feedback voltage

D.To compensate for noise voltage

Ans:A

42.The RC network of a Wien Bridge Oscillator consists of R1=R2=10 K Ohm and C1=C2=1000nF.The frequency of oscillation is:

A.15.9 Hz

B.159.12 Hz

C.180 Hz

D.15915 Hz

Ans:A

43.Which of the following oscillator will give most stable output oscillation frequency?

A.Colpitts oscillator

B.Hartley oscillator

C.Crystal oscillator

D.RC phase shift oscillator

Ans:C

44.Which Number System has a base of 16?

A.Hexadecimal

B.Octal

C.Decimal

D.Binary

Ans:A

45.Which of these sets of Logic Gates are designated as Universal Gates?

A.NOR,NAND,XNOR

B.NOR,NAND,AND

C.OR,NOT,AND

D.NOR,NAND

Ans:D

46.In a 1 to 4 De multiplexer,how many select inputs lines are required?

A.2

B.3

C.4

D.5

Ans:A

47.The Decimal equivalent of (110011.110)2 is

A.25.375

B.25.175

C.25.250

D.25.750

Ans:D

48.The Gray code representation of 15 is

A.1001

B.1000

C.1100

D.None of the above

Ans:B

49.Which of the following expressions is in the Sum-Of-Products(SOP)form?

A.(A+B)(C+D)

B.(A)B(CD)

C.AB+CD

D.All

Ans:C

50.The Terminal count of a modulus-10 binary counter is

A.1010

B.1001

C.1000

D.1011

Ans:B

51.A simple Flip-Flop is

A.1 Bit Memory

B.2 Bit Memory

C.3 Bit Memory

D.None of the above

Ans:A

52.Which of the following is not a weighted code?

A.BCD

B.EXCESS-3 CODE

C.8421

D.6421

Ans:B

53.A Karnaugh map(K-map)with 4 Variable has----------------cells.

A.2

B.8

C.16

D.32

Ans:C

54.A counter is a :

A.Sequential Circuit

B.Combinational Circuit

C.Both Combinational and Sequential Circuit

D.None of the above

Ans:A

55.Which one of the following Logic Family IC is fastest?

A.TTL

B.ECL

C.DTL

D.CMOS

Ans:B

56.In D flip-flop,-----------after the propagation delay.

A.Input Follows Input

B.Output Follows Output

C.Output Follows Input

D.Input Follows Output

Ans:C

57.The Op-Amp can Amplify

A.A.C.Signals only

B.D.C.Signals only

C.Both A.C.and D.C.Signals

D.Neither D.C.nor A.C.Signals

Ans:C

58.The ideal Op-Amp has the following characteristics:

A.RI=Infinity,A=Infinity,RO=0

B.RI=0,A=Infinity,RO=0

C.RI=Infinity,A=Infinity,RO=Infinity

D.RI=0,A=Infinity,R0=Infinity

Ans:A

59.Differential Amplifiers are used in

A.Buffers

B.Voltage Followers

C.Voltage Regulators

D.Instrumentation Amplifiers

Ans:D

60.What would be a typical value for the unity-gain bandwidth of a 741 Operational Amplifier?

A.10 raise to 3

B.10 raise to 4

C.10 raise to 5

D.10 raise to 6

Ans:D

61.The Open-Loop Gain of an Op-Amp is 10 raise to 5.An input Signal of 1mV is applied to the inverting input with the Non-inverting connected to the ground.The Supply Voltage is +-10V.The Output of the Amplifier will be close to:

A.+100V

B.-100V

C.+10V

D.-10V

Ans:D

62.Which of the following is Hardware Interrupts?

A.RST5.5,RST6.5,RST7.5

B.INTR
C.TRAP

D.All of the above

Ans:D

63.Which Stack is used in 8085?

A.FIFO

B.LIFO

C.FILO

D.None of the above

Ans:B

64.What is mean by ALU?

A.Arithmetic Logic Upgrade

B.Arithmetic Logic Unsigned

C.Arithmetic Logic Signed

D.Arithmetic Logic Unit

Ans:D

65.The 8051 Microcontroller is of-------------Pin Package and a -------------Processor.

A.300,1 byte

B.20,1 byte

C.40,8 bit

D.40,8 Byte

Ans:C

66.What is the function of Watchdog Timer?

A.The Watchdog Timer is an external timer that resets the system if the software fails to operate properly

B.The Watchdog Timer is an internal timer that sets the system if the software fails to operate properly

C.The Watchdog Timer is an internal timer that resets the system if the software fails to operate properly

D.None of the above

Ans:C

67.Which of the following instruction perform as of indirect RAM to Accumulator?

A.MOV A,Rn

B.MOV Rn,A

C.MOV@R1,A

D.MOV A,@R1

Ans:D

68.When the 8051 is reset and the EA line is low,the program counter points to the first program instruction in the:

A.Internal Code Memory

B.Internal Data Memory

C.External Code Memory

D.External Data Memory

Ans:C

69.An alternate function of port pin p3.0(Rxd)in the 8051 is:

A.Serial Port Input

B.Serial Port Output

C.Memory Write Strobe

D.Memory Read Strobe

Ans:A

70.Clamper is also known as

A.Charger

B.Clipper

C.Rectifier

D.DC Restorer

Ans:D

71.Vestigial Type Modulation gives:

A.High SNR

B.Low Bandwidth

C.Wide Bandwidth

D.FM

Ans:B

72.Receiving Antenna for TV is normally

A.Loop Antenna

B.Parabolic Reflector

C.Yagi Antenna

D.Folded Dipole

Ans:C

73.Pre-emphasis is used to

A.Increase RF Power

B.Convert FM into PM

C.Improve SNR

D.Correct AM into AM VSB

Ans:C

74.Sensitivity of Microphone is determined by measuring the ----------

A.Output voltage at a given sound pressure

B.Output current at a given sound pressure

C.Output voltage and current at a given sound pressure

D.None of the above

Ans:A

75.Basic Principles of producing moving pictures is based on:

A.Continuity

B.Illusion of Continuity

C.Both(A)and (B)

D.None of the above

Ans:B

76.Principle of VIDICON camera tube is based on

A.Photo Emission Effect

B.Photo Conduction Effect

C.Field Effect

D.Photo Voltaic Effect

Ans:B

77.A PIN Diode is frequently used as a

A.Peak Clipper

B.Harmonic Generator

C.Voltage Regulator

D.Switching Diode for frequencies up to GHZ range

Ans:D

78.For proper working of a clamper,time constant of the circuit should be

A.Large

B.Small

C.Equal To Signal Time Period

D.Greater Than 5 Times Signal Time Period

Ans:A

79.A UJT has Rbb=10 K Ohm and Rb2=4 K Ohm.Its intrinsic standoff ratio is

A.0.6

B.0.4

C.2.5

D.5/3

Ans:A

80.The main purpose of modulation is to

A.Combine two waves of different frequencies

B.Achieve wave shaping of the carrier wave

C.Transmitting low frequency information over long distance efficiently

D.Produce side bands

Ans:C

81.In AM,the power content of the carrier is maximum when m equals to

A.0

B.1

C.0.8

D.0.5

Ans:A

82.In the context of IC fabrication,metallisation means

A.Connecting metallic wires

B.Forming interconnecting conducting patterns

C.Covering with a metallic cap

D.All of the above

Ans:B

83.Commonly used Ics are---------

A.Thin film

B.Monolithic

C.Hybrid

D.None of the above

Ans:B

84.An Audio Amplifier IC is an example of

A.Digital IC

B.Linear Ic

C.Both(A)and(B)

D.None of the above

Ans:B

85.LM317 Voltage Regulator,what is the minimum value of voltage required between its input and output in order to supply power to an internal circuit?

A.1V

B.3V

C.5V

D.10V

Ans:B

86.What is PSRR Value of an ideal Op-Amp?

A.0

B.Unity

C.Infinite

D.Unpredictable

Ans:A

87.In PLL,the capture range is always----------------the lock range.

A.Greater than

B.Less than

C.Equal to

D.None of the above

Ans:B

88.What is the nature of Radiation Pattern of an isotropic Antenna?

A.Dough-Nut

B.Elliptical

C.Hyperbolic

D.Spherical

Ans:D

89.Which among the following is not a disadvantage of Rhombic Antenna?

A.Requirement of large space

B.Reduced transmission efficiency

C.Wastage of power in terminating resistor

D.Maximum radiated power along main axis

Ans:D

90.If an Antenna draws 12A current and radiates 4KW,then what will be its Radiation Resistance?

A.22.22 Ohm

B.27.77 Ohm

C.33.33 Ohm

D.39.77 Ohm

Ans:B

91.The general arrangement of PLA is

A.AND/OR structure

B.OR/AND structure

C.NAND/NOR structure

D.EX-OR/OR structure

Ans:A

92.Serial access memory at the chip level is classed as memory that has

A.Shift Registers

B.Counters

C.Access time is independent of location of data

D.Internally stored data is used

Ans:A

93.The FPGA refers to

A.First Programmable Gate Array

B.First Program Gate Array

C.Field Program Guard Array

D.Field Programmable Gate Array

Ans:D

94.The Full form of VLSI is

A.Very Large Scale Integration

B.Very Least Scale Integration

C.Very Long Single Integration
D.None of the above

Ans:A

95.VHDL is being used for

A.Documentation

B.Verification

C.Synthesis of Large Digital Design

D.None of the abvoe

Ans:D

96.Which of the following has the capability to store the information permanently?

A.RAM

B.ROM

C.Both RAM and ROM

D.None of the above

Ans:B

97.In a Computer,Registers are present.

A.Within Control Unit

B.Within RAM

C.Within ROM

D.Within CPU

Ans:D

98.The capacity of a memory unit is

A.The number of binary input stored

B.The number of words stored

C.The number of bytes stored

D.None of the above

Ans:C

99.Speed of Data Transmission in 4-G Network of Telecom is

A.386 kbps-2 Mbps

B.2 Mbps

C.100 Mbps-1 Gbps

D.2 Mbps-1Gbps

Ans:C

100.The sequence of operations in which Pulse Code Modulation is
A.Sampling,quantizing,encoding

B.Sampling,encoding quantizing

C.Quantizing,sampling,encoding

D.None of the above

Ans:A