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Measurement and Instrumentation

Measurement and Instrumentation
A megger is usually

Hot-wire type instrument
Moving coil type instrument
Moving iron type instrument
Electro-static type instrument

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Measurement and Instrumentation
The effect of load resistance is important in measurement of

 resistance of shunt winding.
 resistance of ammeter.
 both A and B.
 resistance of shunt.

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Measurement and Instrumentation
A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage

 2 %.
  2.66 %.
 1 %.
 3.33 %.

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Measurement and Instrumentation
If two 300V full scale voltmeters V1 and V2 having sensitivities of 100 kOhm/V and 150 kOhm/V are connected in series to measure 500V then

 V1 = 200V and V2 = 300V.
 V1 = 300V and V2 = 200V.
 V1 = 250V and V2 = 250V.
 V1 = 0V and V2 = 0V.

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Measurement and Instrumentation
A permanent magnet moving coil ammeter has a coil resistance of 99ohm and Full Scale DeflectionFSD. current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is

0.1mA
0.023mA
0.05mA
0.007mA

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Measurement and Instrumentation
The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures

Reactive power of R phase
Active power of Y phase
Power proportional to 3 phase power if the load is balanced
Active power in R phase

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MORE MCQ ON Measurement and Instrumentation

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