electrical

Electrical Instruments MCQ Objective Questions and Answers Page - 1

1.

The use of __________ instruments is merely confined within laboratories as standardizing instruments.

Answer/ Hint      

Answer : A

Explanation :

2.

Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured?

Answer/ Hint      

Answer : B

Explanation :

3.

______________ Instruments are those which measure the total quantity of electricity delivered in a particular time.

Answer/ Hint      

Answer : D

Explanation :

4.

Which of the following are Integrating instruments?

Answer/ Hint      

Answer : D

Explanation :

5.

Resistances can be measured with the help of

Answer/ Hint      

Answer : D

Explanation :

6.

According to application, instruments are classified as

Answer/ Hint      

Answer : C

Explanation :

7.

Which of the following essential features is possessed by indicating instrument?

Answer/ Hint      

Answer : D

Explanation :

8.

A  ____________  device prevents the oscillation of the moving system and enables the latter to reach its final position quickly

Answer/ Hint      

Answer : C

Explanation :

9.

The spring material used in a spring control device should have the following property.

Answer/ Hint      

Answer : D

Explanation :

10.

Which of the following properties of damping oil must possess?

Answer/ Hint      

Answer : D

Explanation :

11.

A moving-coil permanent-magnet instrument can be used as __________ by using a low resistance shunt.

Answer/ Hint      

Answer : A

Explanation :

12.

A moving-coil permanent-magnet instrument can be used as flux-meter

Answer/ Hint      

Answer : C

Explanation :

13.

Which of the following devices may be used for extending the range of instruments?

Answer/ Hint      

Answer : D

Explanation :

14.

An induction meter can handle current upto

Answer/ Hint      

Answer : D

Explanation :

15.

For handling greater currents induction wattmeters are used in conjunction with

Answer/ Hint      

Answer : B

Explanation :

16.

Induction type single phase energy meters measure electric energy in

Answer/ Hint      

Answer : C

Explanation :

17.

Most common form of AC meters met with in every day domestic and industrial installations are

Answer/ Hint      

Answer : D

Explanation :

18.

Which of the following meters are not used on DC circuits?

Answer/ Hint      

Answer : C

Explanation :

19.

Which of the following is an essential part of a motor meter?

Answer/ Hint      

Answer : D

Explanation :

20.

A potentiometer may be used for

Answer/ Hint      

Answer : D

Explanation :

21.

_____________  is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another.

Answer/ Hint      

Answer : B

Explanation :

22.

The household energy meter is

Answer/ Hint      

Answer : C

Explanation :

23.

The pointer of an indicating instrument should be

Answer/ Hint      

Answer : A

Explanation :

24.

The chemical effect of current is used in

Answer/ Hint      

Answer : A

Explanation :

25.

In majority of instruments damping is provided by

Answer/ Hint      

Answer : C

Explanation :

26.

An ammeter is a

Answer/ Hint      

Answer : A

Explanation :

27.

In a portable instrument, the controlling torque is provided by

Answer/ Hint      

Answer : A

Explanation :

28.

The disc of an instrument using eddy current damping should be of

Answer/ Hint      

Answer : C

Explanation :

29.

The switch board instruments

Answer/ Hint      

Answer : A

Explanation :

30.

The function of shunt in an ammeter is to

Answer/ Hint      

Answer : A

Explanation :

31.

The multiplier and the meter coil in a voltmeter are in

Answer/ Hint      

Answer : A

Explanation :

32.

A moving iron instrument can be used for

Answer/ Hint      

Answer : C

Explanation :

33.

The scale of a rectifier instrument is

Answer/ Hint      

Answer : A

Explanation :

34.

For measuring current at high frequency we should use

Answer/ Hint      

Answer : C

Explanation :

35.

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

Answer/ Hint      

Answer : C

Explanation :

36.

A dynamometer wattmeter can be used for

Answer/ Hint      

Answer : A

Explanation :

37.

An induction wattmeter can be used for

Answer/ Hint      

Answer : C

Explanation :

38.

The pressure coil of a wattmeter should be connected on the supply side of the current coil when

Answer/ Hint      

Answer : A

Explanation :

39.

In a low power factor wattmeter the pressure coil is connected

Answer/ Hint      

Answer : B

Explanation :

40.

In a low power factor wattmeter the compensating coil is connected

Answer/ Hint      

Answer : C

Explanation :

Electrical Instruments MCQ Objective Questions and Answers Page - 1
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