DGVCL Exam Paper (11-12-2011)
In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

Synchronous motor
Induction motor
Universal motor
Reluctance motor

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

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

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

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

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

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

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