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MCQ ON MEASURING INSTRUMENT PAGE - 4

1.

Normally the scale of moving iron instruments will be …

Answer/ Hint      

Answer : D

Explanation :

2.

Moving iron instruments are used to measure both A.C and D.C quantities. What will happen if the terminals of a moving iron instrument are interchanged in D.C circuit?

Answer/ Hint      

Answer : B

Explanation :

3.

Instruments which must not be used in the circuit, when the power is ON are….

Answer/ Hint      

Answer : D

Explanation :

4.

A house has 4KW connected loads and is fed by single-phase supply What range energy meter is recommended for the house?

Answer/ Hint      

Answer : C

Explanation :

5.

In an induction type energy meter, the speed of rotation of the aluminum disc is proportional to the …

Answer/ Hint      

Answer : D

Explanation :

6.

A 3 phase 3  element energy meter of 415 V, 50Hz has its pressure coil rated for…

Answer/ Hint      

Answer : B

Explanation :

7.

Your are testing an energy meterof 240 volts, 50Hz 5 amperes, 750 revolutions per KWh for its performance with some load. When the disc rotates 100 revolutions in 10 minutes, what is the energy sup

Answer/ Hint      

Answer : C

Explanation :

8.

Ammeters used for current measurements in circuits with short overload time] differs from other application Ammeters used I short overload time circuit have..

Answer/ Hint      

Answer : B

Explanation :

9.

You have to connect an ammeter to monitor the current drawn by a 3-phase, 5HP , 415V, 50 Hz squirrel cage induction in motor, connected through a DOL starter. The range of ammeter, suitable for con

Answer/ Hint      

Answer : A

Explanation :

10.

Which type of wattmeter can be used on AC only

Answer/ Hint      

Answer : C

Explanation :

11.

In a dynamometer type wattmeter, the deflecting torque is proportional to …

Answer/ Hint      

Answer : C

Explanation :

12.

What type of quantity is measured in Ferranti type mercury meter?

Answer/ Hint      

Answer : B

Explanation :

13.

The reading on a 3 digit milli voltmeter started flashing continuously when connected across a resistor to measure the MV DEOP ACROSS IT. The reason for flashing of display on milli voltmeter is th

Answer/ Hint      

Answer : C

Explanation :

14.

Which one of the following measurement test an not be done with a multimeter?

Answer/ Hint      

Answer : D

Explanation :

15.

In battery-powered digital multimeter, LCD displayed is most commonly used. The reason for this is

Answer/ Hint      

Answer : B

Explanation :

16.

The scale of a multimeter is set at the range of 60 V. the percentage of the indicated error is highest in the range of

Answer/ Hint      

Answer : A

Explanation :

17.

What are the measurements that can be done from a portable digital multimeter without a battery ?

Answer/ Hint      

Answer : D

Explanation :

18.

What are the measurements for which multimeter is suitable without battery?

 

Answer/ Hint      

Answer : B

Explanation :

19.

On the scale of a power factor meter, the pointer indicates 0.8 leading power factor. This value means that the load is a …

Answer/ Hint      

Answer : D

Explanation :

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