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

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

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DGVCL Exam Paper (11-12-2011)
Buchholz relay causes

Alarm for both major and minor faults
Tripping for both major and minor faults
Tripping for minor faults and alarm for major faults
Tripping for major faults and alarm for minor faults

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

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

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