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DGVCL Exam Paper (11-12-2011)

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

Speaker
Scanner
Joystick
Webcam

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

Unbalanced protection
Magnetizing inrush current
Switching over voltages
Lightning

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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)
A fuse is inserted in

Earth continuity conductor
Neutral wire
Phase wire
Both phased and neutral wire

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DGVCL Exam Paper (11-12-2011)
If the excitation of a synchronous generator fails, it acts as a

Induction motor
Synchronous generator
Induction generator
Synchronous motor

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if excitation of synchronous generator fails, operate as induction motor

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

2.55 X rated symmetrical breaking capacity
√2 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)
Which of the following power distribution system gives better reliabity ?

Ring main system
None of these
Radial system
DC 3 wire system

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MORE MCQ ON DGVCL Exam Paper (11-12-2011)

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