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

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

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DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

The demagnetizing effect of armature mmf
The cross-magnetizing effect of armature mmf
Both the cross-magnetizing mmf and the reactance voltage
The reactance voltage

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