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DGVCL Exam Paper (11-12-2011)

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

Different
Equal
Infinite
Zero

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DGVCL Exam Paper (11-12-2011)
The purpose of providing a choke in a tube light is

To eliminate corona effect
To avoid radio interference
To limit the current to an appropriate value
To improve the power factor

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

Points
Pixels
Icons
Spots

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DGVCL Exam Paper (11-12-2011)
The effect of electric shock on the human body depends on

All of these
Voltage
Current
Duration of contact

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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 is safe to human beings
It protects the primary ciruits
It protects the secondary ciruits

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

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

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