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

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

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DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

Harmonics in the generated emf
Amount of copper in the winding
Cost of the machine
Size of the machine

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DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

Low iron loss
Low copper as well as iron loss
Low voltage
Low copper loss

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DGVCL Exam Paper (11-12-2011)
Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit?

Open circuit breaker-open isolator-close earthing switch
Open isolator close circuit breaker-open earthing switch
Close circuit breaker-close isolator - open earthing switch
Close earthing switch - open ciruit- breaker-open islotor

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