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Measurement and Instrumentation

Measurement and Instrumentation
In a portable instrument , the controlling torque is provided by

Eddy currents
Spring
All of the listed here
Gravity

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Measurement and Instrumentation
Dynamic errors are caused by

 environmental error
 instrument not responding fast
 observational error
 human error

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Measurement and Instrumentation
Purely mechanical instrument cannot be used for dynamic measurements because they have

 high inertia.
All of these
 large time constant.
 higher response time.

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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

 ± 7%
 ± 8%
 ± 5%
 ± 6%

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Measurement and Instrumentation
A galvanometer with a full scale current of 10 mA has a resistance of 1000 Ω. The multiplying power (the ratio of measured current to galvanometer current) of 100 Ω shunt with this galvanometer is

 110.
 11.
 100.
 10.

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Measurement and Instrumentation
The error of an instrument is normally given as a percentage of

Mean value
Measured value
Full-scale value
Rms value

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MORE MCQ ON Measurement and Instrumentation

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