Junior Instructor Electronic Mechanic 613/2017 Answer Key

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Post: Junior Instructor (Electronic Mechanic)
Department: Industrial Training
Category Code: 613/17
Qualification: SSLC + National Trade Certificate (NTC) in electrical + 3 year experience; National Apprenticeship Certificate  + 1 year experience;  Diploma in the appropriate branch of Engineering
Date of Test: 04-10-2018


If you find mistakes, please comment below



  1. The software used for high performance numerical computation and visualization
    • MASM
    • MATLAB
    • MENDELEY
    • TASM

  2. VHSIC Hardware Description Language is commonly called
    • VHDL
    • Verilog HDL
    • VHSHDL
    • None of these

  3. In D'Arsonval Movement the torque exerted on the pivoted coil is proportional to the applied
    • Voltage
    • Current
    • Power
    • Amplitude

  4. LVDT is used to measure
    • Temperature
    • Humidity
    • Displacement
    • Magnetic Flux

  5. All pass filters are used for
    • Phase correction
    • Noise reduction
    • Attenuation
    • Amplification

  6. A network designed to attenuate certain frequencies and allow others to pass without attenuation is called
    • Filter
    • Attenuator
    • Low noise amplifier
    • Pre-Amplifier

  7. The instrument used to display a signal in frequency domain is
    • CRO
    • Wave Analyser
    • Spectrum Analyser
    • DSO

  8. IC 7447 is
    • Encoder IC
    • Comparator IC
    • Multiplexer IC
    • Decoder IC

  9. The element used to separate transmitting and receiving signals in a single antenna system
    • Detector
    • Mixer
    • Low Noise Amplifier
    • Duplexer

  10. Which one is not an internal part of PLC?
    • CPU
    • Timer
    • Communication interface
    • DIMM

  11. In an SCR Holding current is
    • Equal to latching current
    • Less than Latching current
    • Greater than Latching current
    • Zero

  12. The synchronous speed of a synchronous motor is directly proportional to
    • Number of poles
    • Applied voltage
    • Frequency of input voltage
    • None of these

  13. Bandwidth of an FM radio station
    • 250 KHz
    • 175 KHz
    • 200 KHz
    • 10.5 KHz

  14. Number of Flip Flips required to construct a MOD-12 counter
    • 12
    • 6
    • 4
    • 3

  15. The IC 8279 is
    • DMA controller
    • PPI
    • Interrupt controller
    • Keyboard and Display Interface

  16. Which logic family has the lowest propagation delay?
    • Standard TTL
    • RTL
    • HTL
    • Schottky TTL

  17. Anti-fuse is related to
    • SCR
    • SRAM
    • ASIC
    • MOSFET

  18. ____________ is not a microprocessor.
    • 8088
    • 8086
    • Z80
    • 8051

  19. What is the total power of an AM signal with 100 Watts carrier power and 100% depth of modulation?
    • 100 watts
    • 100 K watts
    • 150 watts
    • 150 K watts

  20. Foster-Seeley demodulator is
    • AM Demodulator
    • FM Demodulator
    • PAM Demodulator
    • PPM Demodulator

  21. SCR in reverse blocking mode, the junctions are reverse biased are
    • J1 alone
    • J2 and J3
    • J2 Alone
    • J1 and J3

  22. Snubber circuits are used in SCR circuit for
    • To limit current
    • To protect from high dv/dt
    • Protect from over temperature
    • None of these

  23. Which oscillator that can be fabricated in IC form?
    • Relaxation Oscillator
    • Crystal Oscillator
    • RC Phase Shift Oscillator
    • Wein Bridge Oscillator

  24. Base of a number system is also called
    • Count
    • Radix
    • Value
    • Nibble

  25. Divide by error interrupt in 8086 can initiated using
    • RST 0
    • by Resetting
    • Using INTR
    • INT 0

  26. Using three numbers of resistances _____________ number of combinations can be made.
    • 3
    • 4
    • 5
    • 2

  27. The ideal output resistance of a voltage amplifier is ___________ resistance.
    • Unity
    • Infinity
    • 1000
    • Zero

  28. CMRR is related to
    • Inverter
    • Chopper
    • Amplifier
    • Op-Amp

  29. Capacity of a single layer Blu-Ray disc
    • 5.5 GB
    • 11 GB
    • 25 GB
    • 50 GB

  30. Nyquist sampling theorem is related to
    • BPSK
    • PPM
    • PCM
    • FDM

  31. The ideal data speed of 5 G mobile network
    • 20 GB/s
    • 5 GB/s
    • 1 GB/s
    • 22.5 GB/s

  32. The type of connector used in telephones
    • RJ-45
    • RJ-11
    • RJ-10
    • RJ-9

  33. Signals transmitted over several different paths is called
    • Multi-user diversity
    • Time diversity
    • Space diversity
    • None of these

  34. The light detector used in optical fiber communication
    • PIN Diode
    • APD
    • PIN Diode and APD
    • None

  35. Class C amplifiers are commonly used as ____________ Amplifiers.
    • AF current
    • AF voltage
    • Radiofrequency
    • Pulse amplifier

  36. The number of select lines in a 1 to 8 de-multiplexer is
    • 2
    • 3
    • 4
    • 8

  37. Number of address lines required to address a memory system made of 2 modules of 1 MB memory chips
    • 12
    • 20
    • 21
    • None of these

  38. A Karnaugh Map is an abstract form of ___________ diagram.
    • Cycle diagram
    • Block diagram
    • Logical diagram
    • Venn diagram

  39. A logic circuit that has memory is
    • Sequential circuit
    • Combinational circuit
    • Both Sequential circuit and Combinational circuit
    • None of these

  40. The basic block in an HDL program is called
    • Object
    • Gate
    • Module
    • Model instantiation

  41. Number of bits in a Binary Coded Decimal Number
    • 8
    • 4
    • 2
    • 1

  42. All Keywords in c programming is
    • Lower case
    • Upper case
    • Both upper and lower cases
    • Digits only

  43. In the specifications of a network interface card 10/100 stands for
    • Length of Media
    • Mega bits per second
    • Protocol
    • None of these

  44. Ripple factor of Halfwave rectifier is
    • 1.21
    • 0.482
    • 40.6
    • 81.2

  45. Major application of a Varactor diode is
    • Rectifier
    • Voltage doubler
    • Demodulator
    • Tuning circuit

  46. Cut-in voltage of a Germanium diode is
    • 0.2 V
    • 0.6 V
    • 1.0 V
    • 0.7 V

  47. Which of the following has highest internal resistance?
    • A constant current source
    • A constant voltage source
    • Both of these
    • None of these

  48. A DC current source has a short circuit current of 4 mA and an open-circuit voltage of 20 V. The internal resistance is
    • 5 KΩ
    • 100 Ω
    • 4 KΩ
    • 100 KΩ

  49. The overall gain of RC coupled amplifier is small due to
    • Large bandwidth
    • Loading effect of successive stages
    • Impedance of capacitor
    • None of these

  50. Intrinsic standoff ratio is the characteristics of
    • Semi-conductor
    • Tunnel diode
    • FET
    • UJT

  51. Stability of a circuit increases with
    • Positive feedback
    • Negative feedback
    • Current series feedback
    • Both Positive feedback and Negative feedback

  52. An emitter follower is
    • Current series feedback circuit
    • Voltage series feedback circuit
    • Both Current series feedback circuit and Voltage series feedback circuit
    • None of these

  53. The output frequency of a crystal oscillator is stable because of
    • High Q of the crystal
    • Low XL/R Ratio
    • Rigid Crystal Structure
    • Small size

  54. An Ideal Op-Amp has
    • Zero output resistance
    • Infinite Voltage gain
    • Infinite input impedance
    • All of these

  55. An example for wave shaping circuit is
    • Astable Multi-vibrator
    • RC Relaxation oscillator
    • Schmitt Trigger
    • None of these

  56. Number of diodes in a bridge rectifier is
    • 2
    • 4
    • 1
    • None of these

  57. Bucking voltage is another name for
    • Back emf
    • Breakdown voltage
    • Saturation voltage
    • Knee voltage

  58. The gain of amplifier in RC phase shift oscillator should be
    • 180
    • 1
    • 28
    • 29

  59. In a PTC thermistor, the temperature at which resistance increases rapidly is known as
    • Temperature coefficient
    • Switching point
    • Breakpoint
    • Valley point

  60. Forbidden energy gap of Germanium is
    • 0.72 eV
    • 1.12 eV
    • 1.1 eV
    • 2.1 eV

  61. Esaki diode is another name for
    • Schottky Diode
    • PIN Diode
    • Tunnel Diode
    • DIAC

  62. In a signed binary number, the sign used to indicate a negative number is
    • 0
    • 1
    • 00
    • None of these

  63. Which one is a serial to parallel converter?
    • Decoder
    • Multiplexer
    • De-Multiplexer
    • Both Decoder and Multiplexer

  64. Number of modes of operations in TRIAC
    • 4
    • 2
    • 5
    • 1

  65. Which one is not a networking component?
    • RS 232
    • NIC
    • Router
    • Bridge

  66. How many bytes of bits addressable locations are present in 8051 microcontroller?
    • 20
    • 16
    • 8
    • 32

  67. Instruction queue size in 8086 is ___________ bytes.
    • 6
    • 8
    • 12
    • 16

  68. Number of transistors integrated into 8086 microprocessor
    • 32000
    • 29000
    • 20000
    • 64000

  69. Inelastic scattering of photon is defined by
    • Hall effect
    • Miller effect
    • Multiple scattering
    • Raman effect

  70. Rise time budget is related to
    • Microwave link
    • RF link
    • Optical link
    • None of these

  71. Johnson-Nyquist noise is another name for ___________ noise.
    • Short noise
    • Flicker noise
    • Transit time noise
    • Thermal noise

  72. According to _____________, a spatially varying electric field is always associated with a magnetic field that changes over time.
    • Lens law
    • Faraday's law
    • Flemings LH law
    • Maxwells equations

  73. A hollow conductive metal pipe used for communication is called
    • Microwave link
    • Wave Guide
    • Duct
    • OFC

  74. Which one is not an embedded operation system?
    • Android
    • WebOS
    • iOS
    • Solaris

  75. The first Personal Computer (PC) was introduced by
    • IBM
    • Intel
    • Microsoft
    • Sun Microsystems

  76. IEEE 802.11 is the standard used for
    • GSM
    • CDMA
    • Ethernet
    • WLAN

  77. The point of intersection of DC and AC load lines is called
    • Saturation point
    • Cut-off point
    • Operating point
    • Peak point

  78. A zener diode that has very narrow depletion layer will breakdown by ___________ mechanism.
    • Zener breakdown
    • Avalanche breakdown
    • Both Zener breakdown and Avalanche breakdown
    • None of these

  79. In a multivibrator, we have _____________ feedback.
    • Negative feedback
    • 50% positive feedback
    • 100% positive feedback
    • None of these

  80. For display of signal pattern ____________ voltage is applied to the horizontal plates of a CRO.
    • Sinusoidal
    • Saw tooth
    • Triangular
    • Rectangular

  81. Who repealed the vernacular press act?
    • Lord Litton
    • Lord Ripon
    • Lord Wellesley
    • Lord Mount Batten

  82. The pioneer of Indian Communism is
    • P.C. Ray
    • B.G. Tilak
    • Bipan Chandra Pal
    • M.N. Roy

  83. 'Kanya Van Samrudhi Yojana' is launched by
    • Maharashtra
    • Andhra Pradesh
    • Gujarat
    • U.P.

  84. The 'Woods Dispatch' of 1854 is associated with
    • Setting up of Forest Department in India
    • Establishment of Revenue Department in India
    • Establishment of Universities in India
    • Setting up of Railways in India

  85. The percentage of earth surface covered by India is
    • 2.2%
    • 2.4%
    • 2.6%
    • 2.8%

  86. The first indigenously built atomic power station in India was
    • Tarapur
    • Rawatbhata
    • Kalpakkam
    • Kakrapar

  87. The place where salt satyagraha took place in Kerala?
    • Kollam
    • Payyannur
    • Muzhikkulam
    • Kodungallur

  88. 23rd May 1931 is associated with
    • Surya Sen
    • Ajith Singh
    • Bhagat Singh
    • W.C. Banerjee

  89. The 8th Five Year Plan in India was implemented between
    • 1980-1985
    • 1985-90
    • 1990-92
    • 1992-97

  90. The forced labour without remuneration in pre-modern Kerala was known as
    • Anchuvannam
    • Manigramam
    • Kacham
    • Uzhiyam

  91. At which place, Vaikunda Swamikal attained enlightenment and assumed the title 'Vaikundar'?
    • Tiruchendur
    • Muttapathy
    • Thycaud
    • Madurai

  92. In which year Sri. Brahmananda Sivayogi formed a new philosophy or religion called Anandadarsha?
    • 1889
    • 1890
    • 1892
    • 1895

  93. Which among the following works of Thycaud Ayya showed his scholarship as a Vedantist?
    • Christhumatha Saaram
    • Brahmotharakandam
    • Pracheena Keralam
    • Karuna

  94. In the year 1922, Sri Narayana Guru built a temple at Murukkumpuzha and consecrated not an idol but a mere inscription. Which among the following words are not inscribed in it?
    • Truth
    • Love
    • Mercy
    • Compassion

  95. The Cochin Legislative Council that came into existence in 1925 was inaugurated in ________
    • Tripunithura
    • Cochin
    • Kodungallor
    • Puduvaippu

  96. Who has won the Men's Singles French Open Tennis tournament in 2018?
    • Rafael Nadal
    • Andy Murray
    • Roger Federer
    • Novak Djokovic

  97. The first fish on earth known to be truly warm blooded is _________
    • Salmon
    • Hogfish
    • Flathead Grey Mullet
    • Opah

  98. Which of the following was selected as the best motion picture and took home the Oscar 2018?
    • La La Land
    • Moonlight
    • Hacksaw Ridge
    • Arrival

  99. The place where International Buddhist conference was held in 2018?
    • Lumbini
    • Gaya
    • Patna
    • Banaras

  100. NASA's _________ discovered ancient components necessary for life on Mars.
    • Discovery
    • Endeavor
    • The Curiosity
    • Columbia

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