MEASUREMENT AND INSTRUMENTATION QUIZ

A potentiometer may be used for

Measurrment of resistance

All of the listed here

Calibration of ammeter

Measurement of current

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A ______ device prevents the oscillation of the moving statem and enables the latter to reach its final position quickly

None of the listed here

Deflecting

Damping

Controlling

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To increase Q factor of a coil, the wire should be

long.

thick.

thin.

long and thin.

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A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is

4.8 μH/radian.

2.0 μH/radian.

114.6 μH/radian.

12.0 μH/radian.

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The moving coil-meters, damping is provided by

damping vane in the airtight chamber.

the coil spring attached to the moving.

the aluminium frame of the coil.

eddy current disk.

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The operating voltage of a megger is about

100 V

6 V

40 V

12 V

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In a CRO which of following is not a part of electron gun?

X-Y plates

Grid

Accelerating anode

Cathode

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For measurement of inductance having high value, we should use

Maxwell's bridge

Maxwell wein bridge

Hay's bridge

Any of the listed here

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The rectifier instrument is not free from

Wave shape error

Temperature error

All of the listed here

Frequency error

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Which of the following instruments can be used to measure AC current only?

Moving iron voltmeter

Permanent Magnet Type ammeter

Induction type ammeter

Moving iron ammeter

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