Corona Loss | Transmission And Distribution Objective Type Questions and answers
36. Corona is
A. Partial breakdown of air
B. Complete breakdown of air
C. Sparking between lines
D. All of the above
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B. Complete breakdown of air
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37. Corona is accompanied by
A. Violate visible discharge in darkness
B. Hissing sound
C. Vibration
D. All of the above
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38. Corona loss increases with
A. Decrease in conductor size and increase in supply frequency
B. increase in both conductor size and supply frequency
C. Decrease in both conductor size and supply frequency
D. Increase in conductor size and decrease in supply frequency
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39. Corona loss can be reduced by the use of hollow conductors because
A. The current density is reduced
B. The eddy current in the conductor is eliminated
C. For a given cross-section, the radius of the conductor is increased
D. Of better ventilation in the conductor
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40. Corona loss in a transmission line is dependent on
A. Diameter of the conductor
B. Material of the conductor
C. Height of the conductor
D. None of the above
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