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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is

36 H
2.2 H
13 H
6 H

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DGVCL Exam Paper (11-12-2011)
If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be

10
25
15
50

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DGVCL Exam Paper (11-12-2011)
Transposition of transmission line is done to

Balance line voltage drop
Reduce line loss
Reduce corona
Reduce skin effect

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DGVCL Exam Paper (11-12-2011)
In the protection of transformers, harmonic restraint is used to guard against

Switching over voltages
Magnetizing inrush current
Lightning
Unbalanced protection

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Initial inrush of magnetizing currents have high component of even and odd harmonics.
2nd - 63%
3rd -26.8%
4th- 5.1%
5th- 4.1%
6th- 3.7
7th-2.4

DGVCL Exam Paper (11-12-2011)
People can interact with each other through any part of the world through video conferencing using

Scanner
Webcam
Speaker
Joystick

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DGVCL Exam Paper (11-12-2011)
What happens to the contents of RAM (Random Access Memory) when the power of the computer is turned off?

Content gets corrupted
Content remains intact
Content is transferred to other memory
Content is lost

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