MGVCL Exam Paper (30-07-2021 Shift 1)
In a single phase energy meter, the series electromagnet is energized by a ___ of ___

voltage coil, thick wire of few turns
current coil, thin wire of more turns
voltage coil, thin wire of more turns
current coil, thick wire of few turns

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MGVCL Exam Paper (30-07-2021 Shift 1)
An RC series circuit with R = 150 Ω and C = 2 μF is excited by a DC source of 15 V by closing the switch at t = 0 with an initially uncharged capacitor. The initial and final voltages across the capacitor respectively are

0 V, 15 V
15 V, 10 V
0 V, 10 V
10 V, 15 V

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MGVCL Exam Paper (30-07-2021 Shift 1)
Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___

Whether the oil test indicates moisture
Turns ratio values
Movement of the windings (change in capacitance)
Condition of paper insulation (change in watts losses)

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MGVCL Exam Paper (30-07-2021 Shift 1)
The normal percentage bias setting of differential relay used for transformer protection will be

above 75%
between 50% and 75%
below 10%
between 10% and 50%

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