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

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DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means

The change in the same reading when the input is first increased and then decreased
The reliability of the instrument
The inaccuracy due to change in temperature
The repeatability of the instrument

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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?

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

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