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Measurement and Instrumentation

Measurement and Instrumentation
What is the standard unit for length ?

 Meter
 Kilometer
 Inch
 Centimeter

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Measurement and Instrumentation
Wagner earthing device is used to eliminate errors due to

None of these
Both A and B
Electrostatic coupling
Electromagnetic coupling

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Measurement and Instrumentation
A megger is usually

Moving coil type instrument
Moving iron type instrument
Hot-wire type instrument
Electro-static type instrument

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 1.5) A
 (400 ± 1) A
 (400 ± 2.24) A
 (400 ± 3) A

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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

 1.5 V.
 1 V.
 1.34 V.
 1.7 V.

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Measurement and Instrumentation
A first order instrument is characterized by

 Time constant only
 Static sensitivity and damping coefficient
 Static sensitivity, damping coefficient and natural frequency of oscillations
 Static sensitivity and time constant

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MORE MCQ ON Measurement and Instrumentation

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