MGVCL Exam Paper (30-07-2021 Shift 1)
___ is the short time reduction in the rms voltage between 0.1 to 0.9 p.u for a duration of ___

Voltage swell, 0.5 cycle to 1 minute.
Voltage sag, greater than 1 minute
Voltage swell, greater than 1 minute
Voltage sag, 0.5 cycle to 1 minute.

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MGVCL Exam Paper (30-07-2021 Shift 1)
A grid interactive solar system:

always supplies power to the grid
works only when the grid fails
supplies power to as well as receives power from the grid as required
always receives power from the grid

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MGVCL Exam Paper (30-07-2021 Shift 1)
A balanced delta connected load of 8+j6 Ω per phase is connected to a 415 V, 50 Hz, 3-phase supply lines. If the input power factor is improved to 0.9 by connecting a star connected capacitor bank, then the required kVAR of the bank is

10.98 kVAR
8.98 kVAR
14.98 kVAR
16.98 kVAR

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MGVCL Exam Paper (30-07-2021 Shift 1)
___ is the rms value of the total current comprising the AC and DC components of the current in the circuit breaker pole at the instant of contact separation.

Asymmetrical breaking current
Symmetrical breaking current
Symmetrical short circuit current
Making current

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MGVCL Exam Paper (30-07-2021 Shift 1)
For sea water with σ = 5 mho/m and ε_r = 80, what is the distance for which ratio signal can be transmitted with 90% attenuation at 25 kHz?

327 m
0.327 m
32.7 m
3.27 m

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