Electrical Measurement and Measuring Instruments (3160915) MCQs

MCQs of Measurement of Parameters

Showing 1 to 10 out of 63 Questions
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1.

The high torque to weight ratio in an analog indicating instrument indicates

(a)

low friction loss.
(b)

high friction loss.
(c)

nothing related to friction loss.
(d)

none of these.
Answer:

Option (a)

2.

A high frequency AC signal is applied to a PMMC instrument. The RMS value of the AC signal is 2V, the reading of the instrument is

(a)

2V.
(b)

2√2V.
(c)

√2V..
(d)

Zero
Answer:

Option (d)

3.

Deflection method direct measurements are most widely used as these are

(a)

least time consuming.
(b)

most simple.
(c)

most simple and least time consuming.
(d)

most accurate.
Answer:

Option (a)

4.

A null type instrument as compared to a deflected type instrument has

(a)

a lower sensitivity
(b)

a faster response.
(c)

a higher accuracy.
(d)

all of the above.
Answer:

Option (c)

5.

The moving coil-meters, damping is provided by

(a)

the aluminium frame of the coil.
(b)

the coil spring attached to the moving.
(c)

eddy current disk.
(d)

damping vane in the airtight chamber.
Answer:

Option (a)

6.

The scale of hot wire ammeter is

(a)

Linear.
(b)

 Non Linear.
(c)

Cramped.
(d)

Absloute linear.
Answer:

Option (b)

7.

The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

(a)

Low.
(b)

Very low.
(c)

High.
(d)

Almost zero.
Answer:

Option (c)

8.

The dynamometer principle can be used for

(a)

ammeter only.
(b)

wattmeter only.
(c)

voltmeter only.
(d)

ammeter, voltmeter and wattmeter.
Answer:

Option (b)

9.

The potential transformers are used to measure large voltage using

(a)

High range ammeter
(b)

High range voltmeter
(c)

Low range voltmeter
(d)

Low range ammeter
Answer:

Option (c)

10.

In a moving iron type ammeter, the coil has

(a)

few turns of thick wire
(b)

few turns of thin wire
(c)

large number of turns of thin wire
(d)

large number of turns of thick wire
Answer:

Option (a)

Showing 1 to 10 out of 63 Questions
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