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Measurement and Instrumentation

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

 Random errors
 Environmental errors
 Gross errors
 Systematic errors

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Measurement and Instrumentation
Standardization of potentiometer is done in order that, they become

 accurate and precise.
 precise.
 accurate and direct reading.
 accurate.

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

Ohmmeter
Voltmeter and ammeter
Wheatstone bridge
Potentiometer

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Measurement and Instrumentation
In a megger controlling torque is provided by

Eddy current
Coil
Spring
Gravity

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1 V.
 1.5 V.
 1.34 V.
 1.7 V.

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Measurement and Instrumentation
The coil of a moving iron instrument has a resistance of 500 ohm and inductance of 1 H. It reads 250 V when a 250 V DC is applied. It series resistance is 2000 ohms its reading when fed by 250 V, 50 Hz AC will be

 248 V.
 252 V.
 250 V.
 260 V.

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MORE MCQ ON Measurement and Instrumentation

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