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Measurement and Instrumentation

Measurement and Instrumentation
The errors introduced by an instrument fall in which category ?

 Environmental errors
 Gross errors
 Systematic errors
 Random errors

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Measurement and Instrumentation
A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is

 0.0012 Ohm.
 120 Ohm.
 0.0024 Ohm.
 240 Ohm.

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Measurement and Instrumentation
Commonly used standard capacitor is

Spherical type
Multiplate parallel plate type
Concentric cylindrical type
Electrostatic type

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Measurement and Instrumentation
A moving coil permanent magnet instrument can be used as ______ by using a low resistance shunt.

Voltmeter
Ammeter
Ballastic galvanometer
Flux meter

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Measurement and Instrumentation
The expected value of the voltage across a resistor is 80 V, and the measured value is 79 V. What is the percentage error and relative accuracy of the measurement ?

 1.5% & 99%
 1.25% & 98.25%
 1.25% & 98.75%
 1.5% & 98.75%

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Measurement and Instrumentation
Which of the following meters has a linear scale?

Thermocouple meter
Hot wore meter
Moving coil meter
Moving iron meter

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