Electrical Engineering Questions And Answers :: Switchgear Protections: part2

Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part2 : 21 to 25

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

21.Which of the following is the least expensive protection for overcurrent is low voltage system ?

Rewireable fuse
Oil circuit breaker
Air break circuit breaker

22.To protect most of the electrical equipment handling low power, the types of relays used are

electronic and bimetallic
both (a) and (b)
none of the above

23.Protective relays are devices that detect abnormal conditions in electrical circuits by measuring

current during abnormal condition
voltage during abnormal condition
constantly the electrical quantities which differ during normal and abnormal conditions
none of the above

24.Ungrounded neutral transmission system is not recommended because of system

insulation being overstressed due to pver voltages
insulation overstress may lead to failure and subsequent phase to phase faults
being inadequately protected against ground fault
all of the above

More Switchgear Protections QUESTIONS AND ANSWERS available in next pages

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