Electrical Measurement and Measuring Instruments (3160915) MCQs

MCQs of Measurement of Parameters

Showing 41 to 50 out of 63 Questions
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41.

The secondary winding of a P.T. is designed for _________

(a)

220 V
(b)

2.2 kV
(c)

1.1 kV
(d)

110 V
Answer:

Option (d)

42.

Ratio error in a P.T. depends on _________

(a)

secondary current
(b)

primary voltage
(c)

secondary current
(d)

turns ratio
Answer:

Option (c)

43.

What is effect of the secondary burden on the ratio error?

(a)

ratio error is constant with secondary burden
(b)

ratio error decreases with secondary burden
(c)

ratio error increases with secondary burden
(d)

depends on the supply voltage
Answer:

Option (c)

44.

A PT is a device which is ___________

(a)

Electrostatically coupled
(b)

Electrically coupled
(c)

Electromagnetically coupled
(d)

Conductively coupled
Answer:

Option (c)

45.

Moving Iron Instrument can be used as ____________

(a)

An ammeter for measuring DC as well as AC
(b)

For measuring DC current and voltages only
(c)

An ammeter and a voltmeter for measuring DC as well as AC
(d)

For measuring AC current and voltages only
Answer:

Option (c)

46.

A 10 mA PMMC ammeter reads 4 mA in a circuit. Its bottom control spring snaps suddenly. The meter will now show __________

(a)

10 mA
(b)

8 mA
(c)

2 mA
(d)

Zero
Answer:

Option (d)

47.

A dynamometer type wattmeter consists of ________

(a)

only potential coil
(b)

potential and current coils
(c)

only current coil
(d)

no coils
Answer:

Option (b)

48.

When the moving coil in a Dynamometer type wattmeter deflects ________

(a)

pointer moves
(b)

pointer doesn’t move
(c)

current flows
(d)

voltage is generated
Answer:

Option (a)

49.

Which of following are needed both for protection and metering?

(a)

Energy meter.
(b)

Wattmeters.
(c)

Instrument transformer.
(d)

Power factor meters.
Answer:

Option (c)

50.

A voltmeter using thermocouple measures

(a)

Peak value.
(b)

rms value.
(c)

Average value.
(d)

Peak to peak value.
Answer:

Option (b)

Showing 41 to 50 out of 63 Questions
2 3 4 5 6 7