MGVCL Exam Paper (30-07-2021 Shift 1)
Three equal star-connected inductors take 8 kW at 0.8 power factor when connected to a 460 V three - phase 3-wire supply. If one of the inductor in phase – Y is short circuited, then the line current in phase-Y is ___ Assume RYB sequence.

31.7 A
37.6 A
27.6 A
21.7 A

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MGVCL Exam Paper (30-07-2021 Shift 1)
A coil having an inductance of 100 mH is magnetically coupled to another coil having an inductance of 900 mH. The coefficient of coupling between the coils is 0.45. Calculate the equivalent inductance if the two coils are connected in series aiding.

1270 mH
1135 mH
932 mH
730 mH

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

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MGVCL Exam Paper (30-07-2021 Shift 1)
What is the largest thermal power plant in India?

Talcher Super Thermal Power Station
Sasan Ultra Mega Power Plant
Mundra Thermal Power Station
Vindhyachal Thermal Power Station

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