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Measurement and Instrumentation

Measurement and Instrumentation
An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A. The limiting error in the reading is

 4%
 5%
 3%
 6%

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Measurement and Instrumentation
The power factor of a single phase load can be calculated if the instruments available are

One voltmeter and one ammeter
Any of the listed here
One ammeter, one voltmeter and one energy meter
One voltmeter, one ammeter and one wattmeter

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Measurement and Instrumentation
Ratio of readings of two wattmeter connected to measure power in a balanced 3-phase load is 5:3 and the load is inductive. The power factor at load is

 0.917 lag.
 0.6 lag.
 0.6 lead.
 0.917 lead.

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Measurement and Instrumentation
With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be

1kHz
500Hz
50Hz
100Hz

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Measurement and Instrumentation
No eddy current and hysteresis losses occur in

Electrodynamo meter instruments
Electrostatic instruments
PMMC instruments
Moving iron instruments

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Measurement and Instrumentation
In flux meter, the controlling torque is produced by

 crossed coil mechanism.
 spring.
 weight attached to the moving coil.
 not provided at all.

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MORE MCQ ON Measurement and Instrumentation

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