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Measurement and Instrumentation

Measurement and Instrumentation
A voltage of 2.70 V is being measured by an analog indicating instrument having a scale range of 0 – 5.0 V. If the instrument reads 2.65 V, then absolute error in measurement is

 0.25V
 0.05V
 0.01V
 0.01V

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Measurement and Instrumentation
The transfer instrument which is used for standardization of a polar type AC potentiometer is

 a dynamometer instrument.
 a moving coil instrument.
 a thermal instrument.
 an electrostatic instrument.

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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.
 - 795 W.
 + 597 W.

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Measurement and Instrumentation
PMMC type instruments normally use

Air friction damping
None of these
Eddy current damping
Fluid friction damping

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Measurement and Instrumentation
Which of the following cannot be measured by multimeters?

Resistance
Current
Frequency
Voltage

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Measurement and Instrumentation
A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?

 ± 0.065
 ± 0.045
 ± 0.056
 ± 0.054

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