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Electrician
Electrician Set-1
Corona Lightning and Skin Effect
15

Corona Lightning and Skin Effect MCQ - Electrician (Set-1) with Answers

15) The only advantage of corona is that it :

produces a pleasing luminous glow

makes line current sinusoidal

works as a safety valve for surges

ozone gas is produced

Answer is:

works as a safety valve for surges

Corona Lightning and Skin Effect MCQ - Electrician (Set-1) with Answers

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Related Corona Lightning and Skin Effect MCQ - Electrician (Set-1) with Answers

16) Corona is likely to occur maximum in case of :

distribution lines

transmission lines

domestic wiring

service mains

Answer is:

transmission lines

17) Presence of ozone owing to corona :

improves the power factor

reduces the power factor

corrodes the material

improves regulation

Answer is:

corrodes the material

18) Corona is affected by :

size of conductor

shape and surface condition of the conductor

operating voltage

all of the above

Answer is:

all of the above

19) Corona usually occurs when the electrostatic stress in the air around the conductor exceeds maximum of :

40 kV per cm

30 kV per cm

22 kV per cm

6.6 kV per cm

Answer is:

30 kV per cm

Corona Lightning and Skin Effect MCQ - Electrician (Set-1) with Answers

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