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Measurement and Instrumentation

Measurement and Instrumentation
Dynamic errors are caused by

 observational error
 human error
 instrument not responding fast
 environmental error

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Measurement and Instrumentation
The absolute measurement of resistance is done by

Bridge Method
Lorenz method
Rayleigh method
Ohm’s law method

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Measurement and Instrumentation
A dynamometer wattmeter can be used for

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

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Measurement and Instrumentation
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.

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Measurement and Instrumentation
Which of the following devices may be used for extending the range of instruments?

Potential transformers
Shunt
Current transformers
All of the listed here

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Measurement and Instrumentation
Which of the following devices should be used for accurate measurement of low D.C. voltage?

C. potentiometer
Small range moving coil voltmeter
Small range thermocouple voltmeter
None of these

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