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Measurement and Instrumentation

Measurement and Instrumentation
Dynamic errors are caused by

 environmental error
 instrument not responding fast
 human error
 observational error

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Measurement and Instrumentation
A spring controlled indicating instrument has a deflection of 90deg for maximum current I. The corresponding deflection for a gravity controlled instrument is

120°
0°
90°
30°

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Measurement and Instrumentation
A multirange instrument has

Variable turns of coil
Multirange meters inside the measurement system
Multiple shunt or series resistance inside the meter
Multicoil arrangement

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Measurement and Instrumentation
Moving iron instruments have _____ scale.

None of the listed here
Squared
Log
Uniform

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Measurement and Instrumentation
Instrument transformers are

Power transformers
Both current and potential transformers
Current transformers
Pottential transformers

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Measurement and Instrumentation
A variable w is related to three other variables x, y and z as w = xy/z. The variables are measured with meters of accuracy ± 0.5% reading, ± 1% of full scale value and ± 1.5% reading. The actual readings of the three meters are 80, 20 and 50 with 100 being the full scale value for all three. The maximum uncertainty in the measurement of w will be

 ± 5%
 ± 6%
 ± 8%
 ± 7%

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MORE MCQ ON Measurement and Instrumentation

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