DGVCL Exam Paper (11-12-2011)
The purpose of providing a choke in a tube light is

To improve the power factor
To eliminate corona effect
To limit the current to an appropriate value
To avoid radio interference

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DGVCL Exam Paper (11-12-2011)
DC series motors are best suited for traction work because

Its torque is proportional to the square of the armature current and speed is inversely proportional to torque
Torque and speed are inversely proportional to the square of the armature current
Torque and speed are proportional to the square of the armature current
Its torque is proportional to the square of the armature current and speed is directional proporational to torque

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

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