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Measurement and Instrumentation

Measurement and Instrumentation
Dynamic errors are caused by

 observational error
 environmental error
 human error
 instrument not responding fast

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Measurement and Instrumentation
The problem of Electrostatic coupling in a transformer is acute at

Low frequencies
High frequencies
High load on the transformer
Power frequencies

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Measurement and Instrumentation
For measuring an AC voltage by an AC potentiometer it is desirable that the supply for the potentiometer is taken from

 The same source as the unknown voltage.
 A source other than the source of unknown voltage.
 A battery.
 Any of above.

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Measurement and Instrumentation
Which of the quantity consists of unit as Pascal ?

 Impulse
 Force
 Temperature
 Pressure

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Measurement and Instrumentation
A variable w is related to three other variables x, y and z as w = xy/z. The variables are measured with meters of accuracy ± 0.5% reading, ± 1% of full scale value and ± 1.5% reading. The actual readings of the three meters are 80, 20 and 50 with 100 being the full scale value for all three. The maximum uncertainty in the measurement of w will be

 ± 8%
 ± 7%
 ± 5%
 ± 6%

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.2% less.
 0.2% more.
 0.4% less.
 0.4 more.

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MORE MCQ ON Measurement and Instrumentation

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