Principle of Corona - MCQs with Answers

Principle of Corona - MCQs with Answers

Q1. What is corona?

a. Partial breakdown of air.
b. Complete breakdown of air.
c. Sparking between the lines.
d. None of these.

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Q2. In case of dc voltage, which colour beads are formed near the negative conductor?

a. Reddish.
b. Bluish.
c. Greenish.
d. Violet.

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Q3. In case of dc voltage, smoother _____________ uniform glow near the positive conductor.

a. Yellow.
b. Bluish white.
c. Reddish white.
d. Greenish yellow.

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Q4. Which of the following statements are true related to corona?

1. It causes radio interference.
2. It attenuates lightning surges.
3. It causes power loss.
4. It amplifies switching surges.

The codes are:

a. 1,2,4
b. 1,4
c. 1,2,3
d. 2,3

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Q5. Which gas is formed near to the conductors by producing a hissing noise?

a. Oxygen.
b. Ozone.
c. Hydrogen.
d. Nitrogen.

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Q6. Corona is observed on

a. AC transmissions only.
b. DC transmissions only.
c. AC and DC transmissions.
d. None of these.

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