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

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MGVCL Exam Paper (30-07-2021 Shift 1)
The normal percentage bias setting of differential relay used for transformer protection will be

between 10% and 50%
below 10%
above 75%
between 50% and 75%

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MGVCL Exam Paper (30-07-2021 Shift 1)
The expression for voltage regulation of a short transmission line for lagging power factor is given by: ___, where, 'I' is the line current, 'V_r' is the receiving end voltage, 'R' is the line resistance and 'X' is the line reactance.

(IR cosφ_r + IX sinφ_r)/V_r
(IX cosφ_r + IR sinφ_r)/V_r
(IR cosφ_r - IX sinφ_r)/V_r
(IX cosφ_r - IR sinφ_r)/V_r

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

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