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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
Logarithmic scale
Square-law scale

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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 instruments can be used to measure AC current only?

Moving iron voltmeter
Moving iron ammeter
Induction type ammeter
Permanent Magnet Type ammeter

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Measurement and Instrumentation
An Ohmmeter is a

None of the listed here
Moving iron instrument
Moving coil instrument
Dynamometer instrument

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

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Measurement and Instrumentation
_______ is used to measure the flow of air around aeroplane.

 Venturimeter.
  Anemometer.
 Orifice.
 nucleus.

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