MEASUREMENT AND INSTRUMENTATION QUIZ

A rectifier type instrument is connected to 100VDC and is operated in the DC measuring module reads

90V

111V

100V

50V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Conducting and non magnetic material

Non conducting and magnetic material

Conducting and magnetic material

None of the listed here

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Ratio of readings of two wattmeter connected to measure power in a balanced 3-phase load is 5:3 and the load is inductive. The power factor at load is

0.917 lag.

0.6 lead.

0.917 lead.

0.6 lag.

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YOUR ANSWER : ?

The coil of a moving iron instrument has a resistance of 500 ohm and inductance of 1 H. It reads 250 V when a 250 V DC is applied. It series resistance is 2000 ohms its reading when fed by 250 V, 50 Hz AC will be

250 V.

252 V.

260 V.

248 V.

TRUE ANSWER : ?
YOUR ANSWER : ?

In a megger controlling torque is provided by

Coil

Gravity

Spring

Eddy current

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A transducer measures a range of 0 – 200 N force with a resolution of 0.15 percent of full scale. What is the smallest change which can be measured by this transducer ?

3.33 N

6.66 N

0.3 N

0.15 N

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YOUR ANSWER : ?

The repeat accuracy of an instrument can be judged from its

Standard deviation of error

Static error

Dynamic error

Linearity error

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YOUR ANSWER : ?

Symmetric errors are

Observational errors

Instrument errors

Environment errors

All of the listed here

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A mulliammeter can be used as

Wattmeter

Frequency meter

Ohmmeter

Voltmeter and ammeter

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YOUR ANSWER : ?

The effect of load resistance is important in measurement of

resistance of shunt.

resistance of ammeter.

both A and B.

resistance of shunt winding.

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YOUR ANSWER : ?

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