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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
The picture on the monitor of a computer is made up of tiny coloured dots called

Icons
Pixels
Spots
Points

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

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

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DGVCL Exam Paper (11-12-2011)
Reactance relay is used to protect against

Over voltage faults
Both phase and earth faults
Phase faults only
Earth faults only

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DGVCL Exam Paper (11-12-2011)
Which of the following power distribution system gives better reliabity ?

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

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DGVCL Exam Paper (11-12-2011)
If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will

Restrike
Extinguish
Decrease in size
Increase in size

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DGVCL Exam Paper (11-12-2011)
The bus bar zone faults are generally

Three phase short ciruits
Single line to ground faults
Phase to phase faults
Double line to ground faults

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