MGVCL Exam Paper (30-07-2021 Shift 3)
A single phase motor connected to 400 V, 50 Hz supply takes 25 A at a power factor of 0.75 lagging. Calculate the capacitance required in parallel with the motor to raise the power factor to 0.95 lagging.

82.55 pF
92.55 pF
62.55 pF
72.55 pF

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MGVCL Exam Paper (30-07-2021 Shift 3)
In a single phase energy meter, the pressure / voltage coil is wound on

both the limbs of the laminated core with same turns
both the limbs of the laminated core with different turns
the centre limb of the laminated core / the middle limb of the shunt magnet
the edges of the limb on the laminated core

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MGVCL Exam Paper (30-07-2021 Shift 3)
The miniature circuit breaker (MCB) with ____ trip characteristics trips instantaneously when the current flowing through it reaches between 10 to 20 times the rated current.

Class C
Class Z
Class B
Class D

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MGVCL Exam Paper (30-07-2021 Shift 3)
The sites where the capacity factor is ____ are not considered suitable for wind power generation.

greater than 24%
greater than 12%
less than 24%
less than 12%

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MGVCL Exam Paper (30-07-2021 Shift 3)
In a series RLC circuit, the supply voltage is 230 V at 50 Hz. The resonant current is 2 A at the resonant frequency of 50 Hz. Under the resonant condition, the voltage across the capacitor is measured to be equal to 460 V. What are the values of L and C?

0.73 H and 13.85 pF
0.73 mH and 13.85 pF
0.53 H and 15.83 pF
0.53 mH and 15.83 pF

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