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 motor used in celling fans is

Capacitor start motor
Split phase motor
Universal motor
Capacitor start capacitor run motor

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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 breadth factor
To increase the distributuion factor
To reduce the locking tendency of the rotor

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