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Measurement and Instrumentation

Measurement and Instrumentation
Systematic errors are

All of these
 observational errors.
 instrument errors.
 environmental errors.

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Measurement and Instrumentation
For the AC bridge circuit shown in figure at balance the value of Rd will be

 (Rc/Ra).Rb.
 (Rc/Rb).Ra.
 (Ra/Rc).Rb.
 (Rb/Rc).Ra.

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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
0-150 V voltmeter has an accuracy of 1% of full-scale reading. The voltage measured by the instrument is 75 V. The limiting error is

 1%
 4%
 3%
 2%

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Measurement and Instrumentation
A bridge circuit is shown in the figure below. Which one of the sentence given below is most suitable for balancing the bridge?

 First adjust R4 and then adjust R1.
 First adjust R2 and then adjust R4.
 First adjust R4 and then adjust R2.
 First adjust R2 and then adjust R3.

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Measurement and Instrumentation
A PMMC instrument can be used as flux meter

By using a low resistance shunt
By eliminating the control springs
By making control springs of large moment of inertia
By using a high series resistance

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