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

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

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MGVCL Exam Paper (30-07-2021 Shift 1)
As per ___ guidelines, if the ratio of carbon dioxide (CO₂) and carbon monoxide (CO) in dissolved gas analysis is ___, it is predicted that the condition of paper insulation inside the transformer is poor.

IEC-899, less than 11
IEC-599, more than 11
IEC-899, more than 11
IEC-599, less than 11

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MGVCL Exam Paper (30-07-2021 Shift 1)
Stability of power system can be improved by
1. Reducing voltage of transmission
2. Using parallel transmission lines
3. Using series compensators
Which of the above statements are correct?

2 and 3 only
1 and 2 only
All 1, 2 and 3
1 and 3 only

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