MEASURING INSTRUMENTS - Practice Mode

1) Which electrical effect that the single phase energy meter works?

Heating effect Induction effect Chemical effect Electrostatic effect

Correct Answer: Induction effect

2) Which is the position to use the instrument provided with spring control?

Any position Vertical position only Inclined position only Horizontal position only

Correct Answer: Any position

3) Which instrument is an example of an integrating instrument?

AC voltmeter DC voltmeter Energy meter Tangent galvanometer

Correct Answer: Energy meter

Explanation:

Integrating Instrument – The instrument which measures the total energy supplied at a particular interval of time is known as the integrating instrument. The total energy measured by the instrument is the product of the time and the measures electrical quantities. The energy meter, watt-hour meter and the energy meter are the examples of integrating instrument.

4) How the creeping error is controlled in energy meter?

By reducing rated voltage By increasing the inductive load Deflection of force is directly proportional to the square of the Current Deflection force is inversely proportional to the square of the Current

Correct Answer: Deflection force is inversely proportional to the square of the Current

5) Which source of measuring error is caused by the effect of magnetic fields?

Device error Human error Influence error Switching error

Correct Answer: Influence error

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