MGVCL Exam Paper (30-07-2021 Shift 2)
Operating system is

a program that runs for short duration
a program that runs during log off
a program that runs during log off
a layer between the user and the hardware

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MGVCL Exam Paper (30-07-2021 Shift 2)
A three-phase, 12 kV, 50 Hz and 300 kW load is operating at 0.8 pf lag. If the pf is to be improved to unity, using star connected capacitor, the per phase value of the reactive VAR required is:

75 kVAR
100 kVAR
25 kVAR
50 kVAR

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MGVCL Exam Paper (30-07-2021 Shift 2)
____are long-term (hours-long) voltage sags caused by system overload.

Black outs
Voltage dips
Voltage surges
Brownouts

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