MGVCL Exam Paper (30-07-2021 Shift 3)
In which of the following situations, there is no need to provide directional overcurrent protection.

double end fed, single feeder
ring main
single end fed, single feeder
single end fed, parallel feeder

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MGVCL Exam Paper (30-07-2021 Shift 3)
મેં મીઠાઈ બનાવી'. વાક્યને કેવળ ક્રિયાપદની પ્રેરક રચના કઈ છે?

મીઠાઈ તો હું જ બનવું ને!
મેં મીઠાઈ બનાવડાવી.
હું મીઠાઈ બનાવવા લાગી.
મેં મીઠાઈ બનાવી લીધી.

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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
0.1 Ω
1 Ω
2.5 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.

0.6 Ω
0.8 Ω
0.4 Ω
0.2 Ω

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MGVCL Exam Paper (30-07-2021 Shift 3)
The DC offset in fault current causes conventional over-current (OC) relays to :

sometimes under-reach and sometimes over-reach
over-reach
reach remains unaffected due to DC offset
under-reach

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