electrical

Electrical Instruments MCQ Objective Questions and Answers Page - 3

1.

The power factor of a single phase load can be calculated if the instruments available are

Answer/ Hint      

Answer : B

Explanation :

2.

The desirable static characteristics of a measuring system are

Answer/ Hint      

Answer : B

Explanation :

3.

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

Answer/ Hint      

Answer : C

Explanation :

4.

Systematic errors are

Answer/ Hint      

Answer : D

Explanation :

5.

Standard resistor is made from

Answer/ Hint      

Answer : B

Explanation :

6.

Commonly used standard capacitor is

Answer/ Hint      

Answer : B

Explanation :

7.

Operating torques in analogue instruments are

Answer/ Hint      

Answer : C

Explanation :

8.

Commonly used instruments in power system measurement are

Answer/ Hint      

Answer : A

Explanation :

9.

Damping of the Ballistic galvanometer is made small to

Answer/ Hint      

Answer : A

Explanation :

10.

If an instrument has cramped scale for larger values, then it follows

Answer/ Hint      

Answer : B

Explanation :

11.

Volt box is a component to

Answer/ Hint      

Answer : A

Explanation :

12.

EMF of a Weston cell is accurately measured by

Answer/ Hint      

Answer : A

Explanation :

13.

The gravity controlled instrument has crowded scale because current is proportional to

Answer/ Hint      

Answer : C

Explanation :

14.

A sensitive galvanometer produces large deflection for a

Answer/ Hint      

Answer : A

Explanation :

15.

A multirange instrument has

Answer/ Hint      

Answer : A

Explanation :

16.

The rectifier instrument is not free from

Answer/ Hint      

Answer : C

Explanation :

17.

Alternating current is measured by

Answer/ Hint      

Answer : A

Explanation :

18.

Most sensitive galvanometer is

Answer/ Hint      

Answer : D

Explanation :

19.

Instrument transformers are

Answer/ Hint      

Answer : C

Explanation :

20.

An instrument transformer is used to extend the range of

Answer/ Hint      

Answer : A

Explanation :

21.

Wattmeter cannot be designed on the principle of

Answer/ Hint      

Answer : C

Explanation :

22.

In an energy meter braking torque is produced to

Answer/ Hint      

Answer : D

Explanation :

23.

Various adjustments in an energy meter include

Answer/ Hint      

Answer : D

Explanation :

24.

Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to

Answer/ Hint      

Answer : B

Explanation :

25.

Which of the following is measured by using a vector voltmeter?

Answer/ Hint      

Answer : D

Explanation :

26.

The principle on which vector voltmeter is based is

Answer/ Hint      

Answer : D

Explanation :

27.

To measure radio frequency, the suitable frequency meter is

Answer/ Hint      

Answer : C

Explanation :

28.

Potentiometer is a

Answer/ Hint      

Answer : B

Explanation :

29.

High voltage tests are

Answer/ Hint      

Answer : D

Explanation :

30.

Ring specimens can be tested for its magnetic properties by

Answer/ Hint      

Answer : D

Explanation :

31.

Which of the following instruments can be made using magnetic effect?

Answer/ Hint      

Answer : D

Explanation :

32.

In instruments the tern ‘artificial aging’ is associated with

Answer/ Hint      

Answer : A

Explanation :

33.

Which of the following instruments cannot be used for the measurement of AC as well as DC quantities?

Answer/ Hint      

Answer : B

Explanation :

34.

____________ Instrument is free from hysteresis and eddy current errors.

Answer/ Hint      

Answer : A

Explanation :

35.

The readings of a dynamometer type wattmeter can be highly erratic at

Answer/ Hint      

Answer : C

Explanation :

36.

A multimeter can be used for measuring

Answer/ Hint      

Answer : C

Explanation :

37.

A dynamometer type wattmeter has

Answer/ Hint      

Answer : C

Explanation :

38.

Which of the following cannot be measured by multimeters?

Answer/ Hint      

Answer : A

Explanation :

<< Previous
Electrical Instruments MCQ Objective Questions and Answers Page - 3
Next >>