MEASUREMENT AND INSTRUMENTATION QUIZ

The electrical power to a megger is provided by

Battery

Permanent magnet dc generator

Any of the listed here

Ac generator

TRUE ANSWER : ?
YOUR ANSWER : ?

Wagner earthing device is used to eliminate errors due to

Electrostatic coupling

Electromagnetic coupling

None of these

Both A and B

TRUE ANSWER : ?
YOUR ANSWER : ?

Instrument transformers are

Pottential transformers

Current transformers

Power transformers

Both current and potential transformers

TRUE ANSWER : ?
YOUR ANSWER : ?

Which devices used to measure the temperature of an object ?

Galvanometer

Poteintiometer

Odometer

Thermometers

TRUE ANSWER : ?
YOUR ANSWER : ?

A single phase load is connected between R and Y terminals of a 415 V, symmetrical, 3-phase, 4 wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read

+ 795 W.

- 597 W.

+ 597 W.

- 795 W.

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of change in output to the change in the input is called

precision

resolution

sensitivity

repeatability

TRUE ANSWER : ?
YOUR ANSWER : ?

An induction meter can handle current upto

10 A

100 A

30 A

60 A

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermocouple instrument will measure

Flux

Voltage

Current

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA?

80 mA.

50 mA.

40 mA.

25 mA.

TRUE ANSWER : ?
YOUR ANSWER : ?

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

High

Almost zero

None of the listed here

Low

TRUE ANSWER : ?
YOUR ANSWER : ?

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