MEASURING INSTRUMENTS - Quiz

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

Device error Human error Influence error Switching error

2) Which type of instrument is used with air friction damping?

Moving coil instrument Moving iron instrument Induction type instrument Dynamo meter type instrument

3) Which type of energy meter works with neutral connection?

Three phase two element Three phase three element Single phase single element Three phase two element with CT & PT

4) What is the unit of sensitivity in instruments?

Volt / ohm Ohm / volt Ohm metre Ohm / metre

5) Why two straight holes are provided in the aluminium disc in energy meter?

To reduce the disc weight For power factor correction To prevent the flux leakage To arrest the creeping error