DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

DC
AC
Positive cycle of sine wave
Negative cycle of sine wave

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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
Close earthing switch - open ciruit- breaker-open islotor
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)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Reduce bearing friction
Eliminate hunting and provide adequate starting torque
Reduce winding losses
Eliminate losses on account of fair friction

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