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Measurement and Instrumentation

Measurement and Instrumentation
The errors mainly caused by human mistakes are

  gross error.
 observational error.
 systematic error.
 instrumental error.

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Measurement and Instrumentation
Relative permittivity can be measured by _______ bridge

 Schering.
 Hays.
 Desautys.
 Wheatstones.

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Measurement and Instrumentation
A 10MHz CRO has

5MHz sweep
10MHz horizontal oscillator
10MHz vertical oscillator
10MHz supply frequency

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Measurement and Instrumentation
A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as

 960 rev/KWh.
 1000 rev/KWh.
 3600 rev/KWh.
 3750 rev/KWh.

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Measurement and Instrumentation
To measure ac as well as dc power, we use

Sometimes induction and sometimes dynamometer wattmeter
Dynamometer wattmeter
None of the listed here
Induction wattmeter

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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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MORE MCQ ON Measurement and Instrumentation

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