Measurement and Instrumentation

1. Instrument transformers are

1. potential transformers
2. current transformers
3. both (a) and (b)
4. power transformers

View answer

2. _________ instruments are those which measure the total quantity of electricity delivered in a particular time.

1. Absolute
2. Indicating
3. Recording
4. Integrating

View answer

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

1. deflecting
2. controlling
3. damping
4. any of the above

View answer

4. A direct current can be measured by

1. a D.C. potentiometer directly
2. a D.C. potentiometer in conjunction with a standard resistance
3. a D.C. potentiometer in conjunction with a volt ratio box
4. none of the above

View answer

5. A dynamometer wattmeter can be used for

1. both D.C. and A.C.
2. D.C. only
3. A.C. only
4. any of the above

View answer

6. A moving iron instrument can be used for

1. D.C. only
2. A.C. only
3. both D.C. and A.C.
4. none of the above

View answer

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

1. ammeter
2. voltmeter
3. flux-meter
4. ballistic galvanometer

View answer

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

1. by using a low resistance shunt
2. by using a high series resistance
3. by eliminating the control springs
4. by making control springs of large moment of inertia

View answer

9. A multirangq instrument has

1. multiple shunt or series resistances inside the meter
2. multicoii arrangement
3. variable turns of coil
4. multi range meters inside the measurement system

View answer

10. A phase shifting transformer is used in conjunction with

1. D.C. potentiometer
2. Drysdale potentiometer
3. A.C. co-ordinate potentiometer
4. Crompton potentiometer

View answer