MGVCL Exam Paper (30-07-2021 Shift 2)
Which one of the following statement is TRUE?

The current carrying capacity of cables in DC is less than that in AC.
In the cables, sheaths are used to provide enough strength.
In the cables, the location of fault is usually found out by comparing the capacitances of insulated conductors.
Underground cables are laid at sufficient depth to avoid being unearthed easily due to removal of soil.

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MGVCL Exam Paper (30-07-2021 Shift 2)
A coil having an inductance of 100 mH is magnetically coupled to another coil having an inductance of 900 mH. The coefficient of coupling between the coils is 0.45. Calculate the equivalent inductance if the two coils are connected in series opposing.

1270 mH
1135 mH
730 mH
932 mH

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MGVCL Exam Paper (30-07-2021 Shift 2)
In a short circuit test on circuit breaker, time to reach the peak re-striking voltage is 50 µs with the peak restriking voltage of 100 kV. Determine average RRRV (Rate of rise re-striking voltage)?

4 x 10⁶ kV/sec
2 x 10⁶ kV/sec
3 x 10⁶ kV/sec
1 x 10⁶ kV/sec

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MGVCL Exam Paper (30-07-2021 Shift 2)
In a single phase energy meter, the shunt electromagnet is energized by a ____of ____

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

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