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

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

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

It is suitable for higher speeds
It has a higher efficiency
It's power factor is higher
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
Universal motor
Capacitor start capacitor run motor

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