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Multiple Choice Question (MCQ) of Measurements page-24


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231. The pulse transformer employs

a) Air core
b) Iron core
c) Ferrite core
d) None of the above

Ans: (c)

232. The resolution of potentiometer shall be

a) Zero
b) very small
c) Very large
d) Proportional to its reference voltage

Ans: (c)

233. Which of the following potentiometer is supposed to have infinite resolution?

a) Resistance potentiometer
b) Deposited film potentiometer
c) Kelvins potentiometer
d) None of these

Ans: (b)

234. The LVDT can be used to measure

a) Level
b) Acceleration
c) Speed
d) All of these

Ans: (d)

235. Which of the following recorders are known as null recorders?

a) Strip chart recorders
b) Galvanometric recorders
c) Potentiometric recorders
d) Any of the above

Ans: (c)

236. The Null balance potentiometers are

a) High frequency device
b) Low frequency device
c) Low frequency device with frequency limit of 10 Hz
d) Independent of frequency

Ans: (c)

237. The potentiometric recorders have

a) High sensitivity
b) High sensitivity and independence of lead length
c) Low sensitivity
d) None of these

Ans: (b)

238. The inductance of the current coil of wattmeter is kept

a) As high as possible
b) As low as possible
c) 10 H
d) 1 to 10 H

Ans: (b)

239. The potential coil of wattmeter is designed for

a) Very high inductance
b) Minimum inductance
c) Very low inductance
d) 1 to 10 H

Ans: (b)

240. The potential coil of wattmeter is designed for minimum inductance to

a) Achieve high phase difference between current and voltage
b) Keep current and voltage in same phase
c) Minimize the reactance of the coil
d) Increase the reactance of the coil

Ans: (b)


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