Technical Assistant Legal Metrology 436/2016 Answer Key 61/2018

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Post: Technical Assistant Legal Metrology
Department: Legal Metrology
Category Code: 436/16
Qualification: Diploma in Mechanical/Electronics/Applied Electronics/Electronics and Communication/Instrumentation Technology
Question Paper Code: 61/18
Date of Test: 16-05-2018


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  1. The spherical shape of rain drops are due to ________.
    • surface tension
    • adhesion
    • cohesion
    • viscosity

  2. For maximum discharge the included angle of a triangular notch is ________.
    • 30°
    • 45°
    • 60°
    • 90°

  3. In a lathe, the power transmitted by the lead screw to the carriage is through ________.
    • gear box
    • wom and gear
    • half nut
    • rack and pinion

  4. The unit of kinematic viscosity is ________.
    • stoke
    • poise
    • pascal
    • faraday

  5. For laminar flow; Reynolds number
    • is more than 2000
    • is less than 2000
    • lies between 2000 and 3000
    • lies between 3000 and 4000

  6. Slow plastic deformation of metal under constant stress is known as ________.
    • fatigue
    • pressure tunnel
    • creep
    • stiffness

  7. The device used for mixing air and petrol before admitting into the engine cylinder is ________.
    • super charger
    • carburettor
    • induction manifold
    • throttle valve

  8. In IC engines ,the reciprocating motion of the piston is converted into the rotary motion of the crankshaft by ________.
    • connecting rod
    • piston rod
    • crank
    • rocker arms

  9. The work done in compressing air is maximum, when the compression is ________.
    • isothermal
    • polytropic
    • adiabatic
    • none of these

  10. When the pressure increases, the latent heat of steam ________.
    • remains same
    • decreases
    • increases
    • none of these

  11. The control rods in nuclear reactor are to control ________.
    • temperature
    • absorption of neutrons
    • pressure
    • fuel consumption

  12. ________ is a water tube boiler.
    • Cochran boiler
    • Cornish boiler
    • Lancashire boiler
    • Babcock and Wilcox boiler

  13. The square hole provided on the top surface of the anvil is called ________.
    • spud hole
    • drift hole
    • hardie hole
    • pritchel hole

  14. Method of governing used mainly in diesel engine is ________.
    • quality governing
    • quantity governing
    • combined governing
    • partial governing

  15. Internal energy of a substance depends on ________.
    • volume
    • pressure
    • temperature
    • entropy

  16. The efficiency of a Carnot engine depends on the ________.
    • working substance
    • design of engine
    • size of engine
    • temperature of source and sink

  17. ________ is used to check the clearances between two mating surfaces.
    • Radius gauge
    • Feeler gauge
    • Fillet gauge
    • Pitch gauge

  18. The forging operation that consist of increasing the cross section of a bar is called
    • upsetting
    • scarfing
    • drawing
    • setting

  19. If the standard time to complete a work is 20 hours and the actual time taken to complete the work is 15 hours with a wage rate of ` 100/- per hour, then the total earnings of a worker under Rowan plan is rupees ________
    • 1675
    • 1875
    • 1500
    • 2000

  20. The father of Scientific Management is ________.
    • F.W Taylor
    • H.C. Gantt
    • Robert Owen
    • Meta Calfe

  21. Charpy test is conducted to measure ________.
    • ductility
    • hardness
    • brittleness
    • malleability
    Question error

  22. A work holding device having an integral device for tool guidance is called ________.
    • clamp
    • fixture
    • attachment
    • jig

  23. In ________ welding process exothermal chemical energy is employed for developing high temperature.
    • thermit
    • plasma
    • gas
    • friction

  24. ________ has a safe edge or uncut edge.
    • Flat file
    • Hand file
    • Square file
    • Triangular file

  25. The co-efficient of friction depends upon
    • strength of surfaces
    • area of contact
    • shape of the surfaces
    • nature of surfaces

  26. Galvanizing is the process of providing coating of ________ on steel to prevent from rust.
    • zinc
    • aluminum
    • copper
    • tin

  27. The modulus of elasticity of plastic material is ________.
    • less than unity
    • unity
    • greater than unity
    • zero

  28. In a hydroelectric power plant, the storage reservoir fitted to the penstock near to the turbine is ________.
    • tail race
    • pressure tunnel
    • surge tank
    • dam

  29. Which of the following is applicable for any fluid flow?
    • Darcy's equation
    • Bernoulli's equation
    • Newton's law of motion
    • Continuity equation

  30. The head developed by a centrifugal pump depends on ________.
    • impeller diameter
    • speed
    • impeller diameter and speed
    • density of fluid

  31. ________ is a device which converts one form of energy into another.
    • Transistor
    • Thyristor
    • Transformer
    • Transducer

  32. Moving coil ammeter is ________ instrument.
    • an indicating
    • a controlling
    • a recording
    • a digital

  33. Fiber optic cable carry signals in the form of ________ energy.
    • light
    • electric
    • magnetic
    • heat

  34. Hot wire anemometer is an instrument used to measure ________.
    • impedance
    • flow
    • RBC count
    • e.m.f.

  35. ________ is the unit of resistivity.
    • Ohm.metre square
    • Ohm/metre
    • Ohm/metre square
    • Ohm.metre

  36. In vibration measurement, ________ is used as a transducer to sense displacement, velocity and accelaration.
    • accelerometer
    • pressure guage
    • manometer
    • tachometer

  37. If a strip of conducting material carries current in presence of tranverse magnetic field, an e.m.f. will be produced between the two edges of the material and this property is called ________.
    • seebeck effect
    • piezo electric effect
    • hall effect
    • induction effect

  38. ________ is defined as the mass of water vapour present per unit volume.
    • Relative humidity
    • Relative viscosity
    • Apparent viscosity
    • Absolute humidity

  39. To minimize ________ error, accurate analog meters are provided with mirrored scales.
    • random
    • parallax
    • gross
    • instrumental

  40. The pH value of a given solution is 14. The hydrogen ion concentration of that solution will  be ________.
    • 1014
    • 107
    • 10–14
    • 10–7

  41. In a NTC thermistor, resistivity ________ with the decrease in temperature.
    • increases
    • decreases
    • will go up and down
    • has no effect

  42. ________ is commonly used for high value insulation resistance measurement.
    • CRO
    • DSO
    • Meggar
    • Multimeter

  43. Light dependent resistor is an example of ________ device.
    • photo emissive
    • photo conductive
    • photo voltaic
    • self generative

  44. The output resistance of a source is RO and it is connected to a load resistance RL. The condition for maximum transfer of power from the source to load is given by ________.
    • RO = RL
    • RO = 2 RL
    • RL * RO= 1
    • RL = 2 RO

  45. An arrangement of elastic member as primary transducer and a strain guage attached with it as secondary transducer, is called _______.
    • bellow
    • venturi meter
    • guage meter
    • load cell

  46. In an ECG machine, CRT acts as _______.
    • an analog to digital converter element
    • a data presentation element
    • a data sensing element
    • a data processing element

  47. LVDT is a variable _______ transducer.
    • inductive
    • resistive
    • capacitive
    • semiconductor

  48. Unit of dynamic viscosity is _______.
    • N.s/m3
    • N.s/m
    • N.s/m2
    • N.s.m

  49. Externally powered transducers are called _______ transducers.
    • null
    • active
    • power
    • passive

  50. Chromatography technique is used to study the _______.
    • presence of fire
    • hidden codes in a coded digital information
    • components of a sample mixture
    • frequency spectrum of radio waves

  51. A very high sensitive strain guage will have _______ guage factor.
    • very low
    • high
    • zero
    • minimum

  52. Let XL be the inductive reactance of a coil and XC be the capacitive reactance of a capacitor. Both are connected in parallel. At resonance frequency, _______.
    • XL will be equal to XC
    • XL will be equal to 1/XC
    • XL will be equal to 16XC
    • XC will be equal to 16XL

  53. The stroboscope is used for the measurement of ______.
    • viscosity
    • pressure
    • temperature
    • periodic rotary motion

  54. When a ferromagnetic material is subjected to a changing magnetization, its dimensions will change. This property is known as ______.
    • Magneto resistive effect
    • Magneto strictive effect
    • Electromagnetic induction effect
    • Piezo electric effect

  55. An equipment consumes 115 W, when it is connected to a 230 V/50 Hz ac power source. The alternating current through the equipment will be ______ amperes.
    • 115/230
    • 115/50
    • 230/115
    • 50 * 115/230

  56. Radiation pyrometers are used to measure ______.
    • very low pressure
    • very high pressure
    • very high temperature
    • very low temperature

  57. In a capacitive hygrometer, ______ of the capacitor changes according to the humidity.
    • area of plates in action
    • distance between the plates
    • inductive reactance
    • dielectric constant

  58. The smallest increment in the input quantity that can be detected by a measuring instrument is called its ______.
    • loading effect
    • resolution
    • accuracy
    • precision

  59. Operating specifications of a typical UV water heater are shown as 230 V ± 10 V, AC, 50 Hz, 1 phase, 11 W, input pressure 0.4 – 2 kg/sq.cm etc. on its chassis. Its power rating will be ______.
    • 240 V
    • 1.2 kg/Sq. cm
    • 11 W
    • 2 kg/Sq. cm

  60. Pirani guage is used to measure ______.
    • humidity
    • diameter
    • pH
    • pressure

  61. RC snubber circuit used for
    • di/dt Protection
    • Over voltage Protection
    • Over Current Protection
    • dv/dt Protection

  62. Programmable language used in PLC
    • VHDL
    • ladder logic
    • Embedded C
    • python

  63. In thyristor the time interval between 10% of gate current and 10% of thyristor on state anode current is known as
    • turn-on time
    • rise time
    • delay time
    • spread time

  64. DIAC act as a
    • bidirectional avalanche diode
    • bipolar transistor
    • bidirectional SCR
    • unijunction

  65. FET phototransistor have
    • less sensitive and low offset voltage
    • more sensitive and low offset voltage
    • more sensitive and high offset voltage
    • less sensitive and high offset voltage

  66. The power rating of a 100 ohm resistor carrying a current of 90 mA should be
    • 2 W
    • 1/4 W
    • 1 W
    • 1/2 W

  67. Which of the following used in narrowband RF frequency multiplier?
    • Zener diode
    • Tunnel diode
    • P-N junction diode
    • Varactor diode

  68. The resolution of D/A converter is approximately .2% of its full scale range. It is
    • 8-bit converter
    • 4-bit converter
    • 9-bit converter
    • 12-bit converter

  69. What is the clock frequency of a 4 bit ripple counter, if the period of waveform at the last flip flop is 64 microseconds?
    • 250 kHz
    • 500 kHz
    • 10 kHz
    • 1 kHz

  70. Each cell of static random access cell consist of
    • 4 MOS transistors and 2 capacitors
    • 6 MOS transistors
    • 1 MOS transistor and 1 capacitor
    • 2 MOS transistors and 2 capacitors

  71. Compare to 74-series TTL 1C 54-series TTL IC have
    • More power dissipation
    • More fanout
    • Less fanout
    • Greater tolerance to temperature variation

  72. In a moving coil instrument, the deflecting torque is proportional to
    • Current
    • Square of the current
    • Square root of the current
    • Sine of the measured

  73. Which meter is suitable for measurement of 5 mV at 50MHz?
    • VTVM
    • Electrostatic voltmeter
    • Moving iron voltmeter
    • C.R.O

  74. A galvanometer of resistance 10 Ω gives full scale deflection of with a current of 2 mA. Which resistance should be connected in parallel so that it measure 2 A on full scale deflection?
    • .02 Ω
    • .2 Ω
    • .01 Ω
    • .1 Ω

  75. An X-Y plotter is ________ instrument.
    • recording
    • integrating
    • indicating
    • None of these

  76. Which diode is used for reverse voltage protection?
    • Photo diode
    • Schottky diode
    • PIN diode
    • Avalanche diode

  77. Compare to offline UPS online UPS have
    • Less harmonic distortion and low efficiency
    • High harmonic distortion and low efficiency
    • Less harmonic distortion and high efficiency
    • High harmonic distortion and high efficiency

  78. The maximum slew rate for output voltage Vo = 2 sin ωt, of an op amp is
    • ω
    • ω/2
    • 1/ω
    • 2ω

  79. An operational amplifier is basically a
    • Low gain amplifier
    • High gain DC amplifier
    • High gain RC coupled amplifier
    • Low gain transformer coupled amplifier

  80. The simplified logic expression for A'B + AB' + AB is
    • (A+B)'
    • AB
    • A+B
    • A'+B'

  81. A compensating capacitor in OP AMP prevents
    • Voltage gain
    • Oscillations
    • Input offset current
    • Power bandwidth

  82. For faster switching action of transistor
    • The value of coupling capacitor may be increased
    • A capacitor may be connected across RE
    • A capacitor may be connected in series with base resistor
    • A capacitor may be connected across the base resistance

  83. In voltage amplifiers load resistance should be
    • As large as possible
    • As small as possible
    • Equal to output impedance
    • Equal to input impedance

  84. Relation between IC and IB in saturation condition
    • IC = βIB
    • IC > βIB
    • IC < βIB
    • IC independent of all other parameters

  85. The base transport factor, αT
    • The current due to electrons injected into the collector, to the current due to electrons injected into the base.
    • The current due to electrons injected in the emitter, to the current due to electrons injected in the base.
    • The current due to electrons injected in the base, to the current due to electrons injected in the collector.
    • The current due to electrons injected in the base, to the current due to electrons injected in emitter.

  86. Ratio of majority to minority diffusion current in germanium is
    • 1
    • 0.5
    • 0.25
    • 2

  87. The GaAs tunnel diodes have
    • Low peak voltage to valley point ratio
    • High peak voltage to valley point ratio
    • Lowest negative differential resistance
    • Low tunnel current

  88. The ripple factor decreases with
    • Decrease in C
    • Increase in C
    • Increase in frequency
    • Decrease in frequency
    Question error

  89. If one of diode in bridge full wave rectifier is opens, the output is
    • 0 V
    • One fourth the amplitude of input voltage
    • A half wave rectified voltage
    • A 120 Hz voltage

  90. The average value of halfwave rectified voltage with a peak value of 200 V is
    • 63.7 V
    • 127.3 V
    • 141 V
    • 0 V

  91. The Malayalam newspaper published by Italian Carmelite missionaries.
    • Rajya Samacharam
    • Satyanada Kahalam
    • Nasrani Deepika
    • Paschima Tharaka

  92. Which magazine was called the Bible of the Thiyyas?
    • Dootan
    • Sujana Nandini
    • Sahodaran
    • Mitavadi

  93. Channar Revolt was started in the year
    • 1818
    • 1820
    • 1822
    • 1832
    Question error

  94. Yachana Yatra was organised by which reformer?
    • V.T. Bhattathirippad
    • Poikayil Yohannan
    • Ayyankali
    • Vaikunta Swamikal

  95. Who started the newspaper Velakkaran?
    • Sahodaran Ayyappan
    • Thycaud Ayya
    • Puthuppally Raghavan
    • C. Krishnan

  96. Who is the first Indian woman who received Woodrow Wilson Award for Global Citizenship?
    • Archana Hingorani
    • Archana Bhargava
    • Chanda Kochhar
    • Arundhathi Bhattacharya

  97. Who is the author of The Buried Giant?
    • Jesmyn Ward
    • Kazuo Ishiguro
    • Matthew Weiner
    • Masha Gessen

  98. APJ Abdul Kalam Memorial was situated in
    • Sri Perumputhur
    • Pudukkottai
    • Thiruvarur
    • Pei Karumbu

  99. The first robot to get a citizenship is
    • Catherine
    • Sophia
    • Jennifer
    • Esther

  100. The present President of Iran
    • Hassan Rouhani
    • Bujar Nishani
    • Muhammad Ashraf Ghani
    • Abdul Hamid

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4 Comments

  1. Q.37. Answer is optiin c (Hall effect).
    Hall effect: emmf induced on charge or current carrying conductor in a transverse magnetic field.
    Piezo electric effect: emf induced in a crystal due to mechanical stress

    ReplyDelete
  2. Answer to QN 84 is wrong as at saturation condition Ic is independent of Ib. It is given plainly in first year electronics texts

    ReplyDelete