MGVCL Exam Paper (30-07-2021 Shift 1)
What are the states of the three ideal diodes of the circuit shown in figure ?

D1 OFF, D2 ON, D3 OFF
D1 ON, D2 OFF, D3 ON
D1 ON, D2 OFF, D3 OFF
D1 OFF, D2 ON, D3 ON

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MGVCL Exam Paper (30-07-2021 Shift 1)
For protection of inter-turn fault in transformer, the relays preferred are

Buchholz's relay and differential relay
Overcurrent relay and differential relay
Overcurrent relay and Buchholz's relay
Buchholz's relay, overcurrent relay and differential relay

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MGVCL Exam Paper (30-07-2021 Shift 1)
Which among the following are included in the two part tariff?
i. Fixed charges
ii. Running charges
iii. Semi fixed charges

(i) and (iii) only
(i) and (ii) only
(ii) and (iii) only
(i), (ii) and (iii)

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MGVCL Exam Paper (30-07-2021 Shift 1)
Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___

Movement of the windings (change in capacitance)
Turns ratio values
Whether the oil test indicates moisture
Condition of paper insulation (change in watts losses)

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