Electrical Engineering Questions And Answers :: Switchgear Protections: part2

Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part2 : 16 to 20

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2021 and IES 2021 examinations :

16.When a transmission line is energized, the wave that propagates on it is

current wave only
voltage wave only
both (a) and (b)
power factor wave only

17.Insulation resistance of high voltage circuit breakers is more than

1 mega ohms
10 mega ohms
100 mega ohms
500 mega ohms

18.Wave trap is used to trap waves of

power frequencies
higher frequencies entering genera�tor or transformer units
either of the above
none of the above

19.Interruption of large currents by relay requires

arc suppressing blow out coils
wide separation of the opened contacts
high speed opening of contacts
all of the above

20.The reflection co-efficient at the open circuited end of a transmission line.

none of the above

More Switchgear Protections QUESTIONS AND ANSWERS available in next pages

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