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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
In a power plant, a reserve generating capacity which is not in service but is in operation is known as

Cold reserve
Spinning reserve
Hot reserve
Firm power

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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
DC 3 wire system
Radial system

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DGVCL Exam Paper (11-12-2011)
First zone distance relay protects the transmission line section upto

Its full length
50 % of its full length
80 % of its full length
25 % of its full length

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DGVCL Exam Paper (11-12-2011)
The main criterion for the design of a distributor is

Voltage drop
Temperature rise
Corona loss
Radio interference

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DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance

Current is maximum and power factor is 0.5
Current is maximum and power factor is unity
Current is minimum and power factor is 0.5
Current is minimum and power factor is unity

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

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

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