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Measurement and Instrumentation

Measurement and Instrumentation
If the instrument is to have a wide range, the instrument should have

Linear scale
Exponential scale
Square-law scale
Logarithmic scale

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Measurement and Instrumentation
The meter constant of a single phase 240 V induction watthour meter is 400 revolutions per KWh. The speed of the meter disc for a current of 10 Amperes of 0.8 p.f lagging will be

  12.8 rpm.
 21.1 rpm.
 18.2 rpm.
 16.02 rpm.

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Measurement and Instrumentation
Alternating current is measured by

Electrostatic ammeter
Permanent magnet type ammeter
Moving iron repulsion type voltmeter
Induction ammeter

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Measurement and Instrumentation
An instrument to be used for measurement and control should preferably have

Non-linear output
A highly damped response
Linear output and fast response
Dead zone and dead time

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Measurement and Instrumentation
For measurement on high voltage capacitors, the suitable bridge is

Modified De santy's bridge
Schering bridge
Wein bridge
Any of the listed here

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 2.24) A
 (400 ± 1) A
 (400 ± 3) A
 (400 ± 1.5) A

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MORE MCQ ON Measurement and Instrumentation

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