DGVCL Exam Paper (11-12-2011)
If the excitation of a synchronous generator fails, it acts as a

Synchronous generator
Synchronous motor
Induction generator
Induction motor

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DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Reduce bearing friction
Reduce winding losses
Eliminate hunting and provide adequate starting torque
Eliminate losses on account of fair friction

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

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

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DGVCL Exam Paper (11-12-2011)
An IDMT relay provides

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current
A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current
A definite time cuttent characteristic
An inverse time current characteristic

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