Pin Type Insulator - MCQs with answers

Pin Type Insulator - MCQs with answers

Q1. What is the maximum voltage level upto which the pin type insulators can be used?

a. 22 kV
b. 33 kV
c. 66 kV
d. 132 kV

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Q2. What is the safety factor of an insulator?

a. Puncture strength * Flash over voltage.
b. Puncture strength / Flash over voltage.
c. Flash over voltage / Puncture strength.
d. None of these.

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Q3. What is the desirable safety factor prescribed for the pin type of insulators?

a. 5
b. 13
c. 10
d. 2

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Q4. Why is the voltage rating of a multiple shell pin type insulator cannot be increased beyond a limiting value?

a. The internal voltage distribution between shells becomes unequal.
b. The leakage path resistance starts reducing.
c. The disruptive critical voltage for the material of the insulator is reached.
d. The puncture voltage of the material of the insulator is reached.

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