DGVCL Exam Paper (11-12-2011)
Under operating conditions, the secondary of a current transformer is always short ciruited because

It protects the secondary ciruits
It protects the primary ciruits
It is safe to human beings
It avoids core saturation and high voltage induction

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DGVCL Exam Paper (11-12-2011)
The purpose of skewing of rotor slots in an induction motor is

To reduce the magnetic hum of the motor
To increase the distributuion factor
To increase the breadth factor
To reduce the locking tendency of the rotor

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DGVCL Exam Paper (11-12-2011)
A fuse wire should have

High specific resistance and low melting point
Low specific resistance and low melting point
Low specific resistance and high melting point
High specific resistance and high melting point

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

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