DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are inverse of each other
Have no inter relation
Are transpose of each other
Are the same

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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?

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

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DGVCL Exam Paper (11-12-2011)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

There is a repelling force between the conductors
The force increases when the distance between the conductors is increased
The force increases when the distance between the conductors is decreased
There is an attracting force between the conductors

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