MGVCL Exam Paper (30-07-2021 Shift 2)
A delta-connected balanced three-phase load is supplied from a three-phase, 400 V supply. The line current is 20 A and the power taken by the load is 10 kW. Find the power factor.

0.52
0.82
0.62
0.72

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MGVCL Exam Paper (30-07-2021 Shift 2)
The wind speed increases with height because of

reduction of drag effect of the earth surface
enhancement of drag effect on the earth surface
reduction in lift effect of the air
reduction in the gravitational force

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MGVCL Exam Paper (30-07-2021 Shift 2)
In a power network, 400 kV is recorded at a 415 kV bus. A 50 MVAR, 415 kV shunt reactor is connected to the bus. What is the reactive power absorbed by the shunt reactor?

46.45 MVAR
76.45 MVAR
66.45 MVAR
56.45 MVAR

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which one of these is not a monitoring and diagnostic test for transformer oil?

Volatility Level Analysis
Dissolved Metals Analysis
Furanic Compound Analysis
Dissolved Gas Analysis

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MGVCL Exam Paper (30-07-2021 Shift 2)
A 50 Hz synchronous generator is connected to an infinite bus through a line. The p.u. reactances of generator and the line are j0.3 p.u. and j0.2 p.u. respectively. The generator no load voltage is 1.1 p.u. and that of infinite bus is 1.0 p.u. The inertia constant of the generator is 4 MW-sec/MVA. Determine the frequency of natural oscillations if the generator is loaded to 60% of its maximum power transfer capacity and small perturbation in power is given.

1.42 Hz
1.62 Hz
1.32 Hz
1.52 Hz

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