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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
The best location of the power factor correction equipment to be installed in the transmission line is at

The sending end
Middle of the line
The receiving end
Any place

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DGVCL Exam Paper (11-12-2011)
Under operating conditions, the secondary of a current transformer is always short ciruited because

It avoids core saturation and high voltage induction
It protects the secondary ciruits
It is safe to human beings
It protects the primary ciruits

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DGVCL Exam Paper (11-12-2011)
Rated making capacity of a ciruit breaker is equal to

√2 X rated symmetrical breaking capacity
2.55 X rated symmetrical breaking capacity
Rated symmetrical breaking capacity
1.11 X rated symmetrical breaking capacity

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DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

Trapping high frequency waves entering into generator/transformer unit.
Tripping fault current
Trapping power frequency waves
All of these

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DGVCL Exam Paper (11-12-2011)
The positive and negative sequence impedance of a transmission line are

Equal
Zero
Infinite
Different

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DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are the same
Have no inter relation
Are inverse of each other
Are transpose of each other

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