MGVCL Exam Paper (30-07-2021 Shift 3)
A three phase four pole 50 Hz induction motor has a rotor resistance of 0.02 Ω/phase and stand-still reactance of 0.5 Ω/phase. Calculate the speed at which the maximum torque is developed.

1440 rpm
1475 rpm
1525 rpm
1500 rpm

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MGVCL Exam Paper (30-07-2021 Shift 3)
કામકાજમાં ધ્યાન કન્દ્રિત કરજો'.
આ આજ્ઞાર્થ વાક્યની સંભાવનાર્થ વાક્યરચના કઈ હોઈ શકે?

કામકાજમાં ધ્યાન કેન્દ્રિત નથી કરવું?
હવે તો કામકાજમાં ધ્યાન કેન્દ્રિત કરશો ને?
હવે તો તમે કામકાજમાં ધ્યાન કેન્દ્રિત કરો.
કામકાજમાં ધ્યાન કેન્દ્રિત કરી લીધું છે.

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MGVCL Exam Paper (30-07-2021 Shift 3)
A 10 A, Type C Miniature Circuit Breaker (MCB) will trip at fault currents

between 10 A and 50 A
greater than 100 A
between 50 A and 100 A
less than 10 A

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MGVCL Exam Paper (30-07-2021 Shift 3)
A 50 Hz synchronous generator is connected to an infinite bus through a line. The p.u. reactances of generator and the line are j0.4 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.

1.2 Hz
0.8 Hz
1.8 Hz
1.6 Hz

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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 D
Class B
Class C
Class Z

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