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Measurement and Instrumentation

Measurement and Instrumentation
Which of the quantity consists of unit as newton-second?

 Impulse
 velocity
 Acceleration
 Speed

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Measurement and Instrumentation
Attraction and repulsion type instruments are the two different types of which instrument ?

 Dynamo-meter type.
 Multipliers.
  Moving iron type.
 Induction type.

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Measurement and Instrumentation
An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

 20.
 20√3.
 10.
  10√3.

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Measurement and Instrumentation
Most accurate measurement of unknown resistance will be by

Potentiometer
Wheatstone bridge
Ohmmeter
Voltmeter and ammeter

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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%
 ± 5%
 ± 8%
 ± 6%

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Measurement and Instrumentation
Piezoelectronic accelerometer

 Should be used for low frequency.
 Has a low natural frequency.
 Should use a monitoring source at low input impedance.
 Should be used for high frequencies above 100 Hz.

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