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DGVCL Exam Paper (11-12-2011)

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

Corona loss
Temperature rise
Radio interference
Voltage drop

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

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

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DGVCL Exam Paper (11-12-2011)
The form factor in AC means the ration of

Peak value to r.m.s value
R.M.S. value to peak value
R.M.S. value to average value
Peak value to average value

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DGVCL Exam Paper (11-12-2011)
If a relay fails to operate inspite of a fault in its own zone of protection, it is said to

Over reach
Under reach
Reach
Pick up

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

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

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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 eliminate corona effect
To avoid radio interference
To improve the power factor

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