# Multiple Choice Question (MCQ) of Measurements page-3

21. Which of the following instruments will be used measure 500 kV a.c. voltage ?

a) Moving coil voltmeter
b) Electrostatic voltmeter
c) Moving iron voltmeter
d) Hot wire instrument

Ans: (b)

22. The steady speed of the disc in the energymeter is achieved when

a) Operating torque is to braking torque
b) Operating torque is half of the braking torque
c) Breaking torque is zero
d) Braking torque is more than operating torque

Ans: (a)

23. Creeping is the phenomenon which occurs in

a) Voltmeter
b) Wattmeter
c) Energymeter
d) Ammeter

Ans: (c)

24. The induction type signal phase energymeter is

a) An ampere-hour meter
b) True watt-hour meter
c) Wattmeter
d) VAR meter

Ans: (b)

25.Two holes are drilled in the disc of energymeter on the opposite side of the spindle

a) To reduce the weight of the disc for easy rotation
b) To eliminate creeping on no load
c) For proper ventilation
d) To increase the deflection torque

Ans: (b)

26. Given three methods of localizing the short circuit fault fault in the cables

a) Murray loop test
b) Varley loop test
c) Fisher loop test

Ans: ()

27. This induction method of testing which is used for localization of ground faults in cables can be applied successfully when the cables has metallic sheath.

a) True
b) False

Ans: (a)

28. Which of the following instruments will be used to measure the temperature above 1400 degree centigrade?

a) A simple thermometer pyrometer
b) Electrical resistance pyrometer
c) Thermo-electric pyrometer
d) None of the above

Ans: (c)

29. The temperature coefficient of carbon is negative.

a) True
b) False

Ans: (a)

30. Given the name of three-thermo junctions

a) Copper-constantan
b) Silver-constantan
c) Iron-constantan

Ans: ()

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