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AE-JE Foundation EE : Power Systems Quiz - 3

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Question 1

Which of the following is the main field of application of pin type insulator?

Question 2

In a three unit insulator string voltage across the lowest unit is 25 KV and string efficiency is 88%. The voltage across the string will be equal to

Question 3

Pin insulators are normally used up to voltage of about

Question 4

In a 22 kV overhead line, there are 3 units in the string of insulators. The voltage of the unit nearest to the conductor is given 8.4 kV, then determine the string efficiency?

Question 5

The equivalent arrangement of a two-string insulator is shown in Figure. The maximum voltage that each unit can withstand should not exceed 17.5 kV. The voltage that the complete string can withstand is

Question 6

Which insulator is used on dead ends of medium voltage line?

Question 7

Which of the following is not a constituent for making porcelain insulators?

Question 8

The device which is used for maintaining a uniform voltage in the disc to improve the string efficiency is?

Question 9

A string of suspension insulators has three discs. If the disc nearest to the conductor flashes over (i.e. breaks down), then,

Question 10

The different types of insulators used in transmission lines are

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