DGVCL Exam Paper (11-12-2011)
A Mho relay is a

Voltage restrained directional relay
Directional restrained over current relay
Directional restrained over voltage relay
Voltage controlled over current relay

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

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

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DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means

The reliability of the instrument
The repeatability of the instrument
The change in the same reading when the input is first increased and then decreased
The inaccuracy due to change in temperature

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