MGVCL Exam Paper (30-07-2021 Shift 3)
A 10-pole induction motor is supplied by a 6-pole alternator, which is driven at 1400 rpm. If the motor runs with a slip of 5%, what is its speed?

1575 rpm
1425 rpm
882 rpm
798 rpm

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MGVCL Exam Paper (30-07-2021 Shift 3)
The most commonly used method for the protection of three phase feeder is

Reverse power protection
Time graded protection
None of these
Differential protection

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MGVCL Exam Paper (30-07-2021 Shift 3)
A star connected synchronous generator rated at 500 MVA, 50 kV has a reactance of 0.5 pu. Find the ohmic value of the reactance.

0.25 Ω
1 Ω
2.5 Ω
0.1 Ω

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MGVCL Exam Paper (30-07-2021 Shift 3)
Determine the ohmic value of the current limiting reactor per phase external to a 40 MVA, 15 kV, 50 Hz, three phase synchronous generator which can limit the current on short circuit of 6 times the full load current. The reactance of the synchronous generator is 0.06 pu.

0.8 Ω
0.6 Ω
0.4 Ω
0.2 Ω

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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 B
Class C
Class Z
Class D

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MGVCL Exam Paper (30-07-2021 Shift 3)
If the velocity of wind is doubled then the power output will

reduced to half
increase by 6 times
doubled
increase by 8 times

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