DGVCL Exam Paper (11-12-2011)
The transient stability of a power system can be improved by

Increasing the turbine valve opening
Phase shifting transformer
Excitation control
Single pole switching of circuit breakers

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DGVCL Exam Paper (11-12-2011)
The purpose of skewing of rotor slots in an induction motor is

To increase the breadth factor
To reduce the locking tendency of the rotor
To reduce the magnetic hum of the motor
To increase the distributuion factor

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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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