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

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

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DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

Harmonics in the generated emf
Cost of the machine
Amount of copper in the winding
Size of the machine

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