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)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

The force increases when the distance between the conductors is increased
There is a repelling force between the conductors
The force increases when the distance between the conductors is decreased
There is an attracting force between the conductors

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DGVCL Exam Paper (11-12-2011)
Due to skin effect

Portion of the conductor near the surface carries more current and the core of the conductor carries less current
Uniform current flows through the conductor
Portion of the conductor near the surface carries less current and the core of the conductor carries more current
Current flows through the half cross section of the conductor

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