Electrical Measurement and Measuring Instruments (3160915) MCQs

MCQs of Concepts of measurement

Showing 21 to 27 out of 27 Questions
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21.

Which of the following is the main source of error in null detector?

(a)

wiring resistance
(b)

power dissipation
(c)

lower current detection ability
(d)

insufficient sensitivity of the null detector
Answer:

Option (d)

22.

Hysteresis of an instrument means

(a)

The change in the same reading when input is first increased and
then decreased
(b)

 The reliability of the instrument
(c)

The repeatability of the insrument
(d)

The inaccuracy due to change in temperature
Answer:

Option (a)

23.

In which part of the scale does the pointer indicate
more accurately

(a)

In the first third of the cycle
(b)

 In the first half of the cycle
(c)

In about middle of the scale
(d)

In the last third of the cycle
Answer:

Option (c)

24.

 For measuring an unknown electrical quantity, select
the meter with

(a)

Highest range and work down
(b)

owest range and work up
(c)

iddle range and can be work up or down depending
(d)

Any of the above
Answer:

Option (a)

25.

The ratio of maximum displacement deviation to the full scale deviation of the instrument is called

(a)

Static sensitivity
(b)

Accuracy
(c)

Linearity
(d)

Precision
Answer:

Option (c)

26.

The reliability of the instrument refer to

(a)

 Measurement of changes due to temperature variations
(b)

 Degree to which repeatability continues to remain within
specified limits
(c)

The life of the instrument
(d)

The extent to which the characteristics remain linear
Answer:

Option (b)

27.

The measurement of a quantity

(a)

is a comparison of an unknown quantity with known quantity.
(b)

is a comparison of an unknown quantity with another quantity.
(c)

is a comparison of an unknown quantity with standard.
(d)

none of these.
Answer:

Option (c)

Showing 21 to 27 out of 27 Questions
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