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

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 R_O and it is connected to a load resistance R_L. The condition for maximum transfer of power from the source to load is given by ________.
    • R_O = R_L
    • R_O = 2 R_L
    • R_L * R_O= 1
    • R_L = 2 R_O
    
    
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 X_L be the inductive reactance of a coil and X_C be the capacitive reactance of a capacitor. Both are connected in parallel. At resonance frequency, _______.
    • X_L will be equal to X_C
    • X_L will be equal to 1/X_C
    • X_L will be equal to 16X_C
    • X_C will be equal to 16X_L
    
    
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 V_o = 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 R_E
    • 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 I_C and I_B in saturation condition
    • I_C = βI_B
    • I_C > βI_B
    • I_C < βI_B
    • I_C independent of all other parameters
    
    
85. The base transport factor, α_T
    • 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