DGVCL Exam Paper (11-12-2011)
Which lightning stroke is most dangerous?

Direct stroke on ground wire
Indirect stroke on conductor
Direct stroke on line conductor
Direct stoke on tower top

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DGVCL Exam Paper (11-12-2011)
The corona effect can be minimized by increasing

Diameter of the conductor
The length of the conductor
Both spacing between the conductors and diameter of the conductor
Spacing between the conductors

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DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

Harmonics in the generated emf
Size of the machine
Cost of the machine
Amount of copper in the winding

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

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

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