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

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

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DGVCL Exam Paper (11-12-2011)
The advantage of slipring induction motor over the squirrel cage induction motor is

It's power factor is higher
It can be started with the help of rotor resistances
It has a higher efficiency
It is suitable for higher speeds

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

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

Uniform current flows through the conductor
Portion of the conductor near the surface carries more current and the core of the conductor carries less current
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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