Electrical Measurement and Measuring Instruments (3160915) MCQs

MCQs of Measurement of Parameters

Showing 21 to 30 out of 63 Questions
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21.

The secondary winding of a C.T. has _________

(a)

a large number of turns
(b)

a few turns
(c)

no turns at all
(d)

intermediate number of turns
Answer:

Option (a)

22.

The primary winding of a P.T. has _________

(a)

intermediate number of turns
(b)

no turns at all
(c)

a larger number of turns
(d)

a few turns
Answer:

Option (c)

23.

The secondary winding of a P.T. has _________

(a)

a large number of turns
(b)

intermediate number of turns
(c)

no turns at all
(d)

a few turns
Answer:

Option (d)

24.

Instrument transformers provide _________

(a)

electrical isolation from low rated winding
(b)

electrical isolation from high rated winding
(c)

electrical isolation from medium rated winding
(d)

no electrical isolation at all
Answer:

Option (b)

25.

C.T. and P.T. are standardized at _________

(a)

50 A and 220 V
(b)

25 mA and 2.2 kV
(c)

5 A and 110 V
(d)

75 nA and 1.1 MV
Answer:

Option (c)

26.

A 5A ammeter can measure a current of upto 1000 A using a _________

(a)

5/1000A C.T.
(b)

1000A C.T.
(c)

5A C.T.
(d)

1000/5A C.T.
Answer:

Option (d)

27.

A 110V voltmeter can measure a voltage of upto 110kV using a _________

(a)

110000/110V P.T.
(b)

110000V P.T.
(c)

110V P.T.
(d)

110/110000V P.T.
Answer:

Option (a)

28.

How can the meter circuit be isolated from the power circuit?

(a)

by grounding
(b)

through electrical isolation
(c)

by physical separation
(d)

through mechanical isolation
Answer:

Option (b)

29.

Transformation ratio of an instrument is defined as ____________

(a)

ratio of primary to secondary phasor
(b)

ratio of secondary to primary phasor
(c)

reciprocal of the primary phasor
(d)

reciprocal of the secondary phasor
Answer:

Option (a)

30.

Nominal ratio of an instrument transformer is defined as the __________

(a)

reciprocal of the rated primary value
(b)

ratio of rated secondary value to primary value
(c)

reciprocal of the rated secondary value
(d)

ratio of rated primary value to secondary value
Answer:

Option (d)

Showing 21 to 30 out of 63 Questions
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