DGVCL Exam Paper (11-12-2011)
The advantage of slipring induction motor over the squirrel cage induction motor is

It's power factor is higher
It has a higher efficiency
It is suitable for higher speeds
It can be started with the help of rotor resistances

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DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

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

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

Tripping for both major and minor faults
Alarm 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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