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Measurement and Instrumentation

Measurement and Instrumentation
A dynamometer wattmeter can be used for

DC only
Both DC and AC
AC only
Any of the listed here

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Measurement and Instrumentation
The material of the shunt should have _______ temperature co-efficient of resistance.

Negligible
None of the listed here
Negative
Positive

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Measurement and Instrumentation
The ratio of change in output to the change in the input is called

 repeatability
 resolution
 sensitivity
 precision

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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

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

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Measurement and Instrumentation
For measurement of high direct voltage, one would use _____ voltmeter.

Moving iron
Electrostatic
PMMC
Hot wire

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Measurement and Instrumentation
A sinusoidal signal waveform, when observed on an oscilloscope, has a peak to peak amplitude of 6 cm. If the vertical sensitivity setting is 5 v/cm, then rms value of the voltage will be

  10.6 V.
 15 V.
 12.6 V.
 11.1 V.

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