Electrical Engineering Questions And Answers :: Switchgear Protections: part1

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Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part1 : 11 to 15

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

11.SF6 gas

is yellow in colour
is lighter than air
is nontoxic
has pungent small

12.Circuit breakers usually operate under

transient state of short-circuit current
sub-transient state of short-circuit current
steady state of short-circuit current
after D.C. component has ceased

13.D.C. shunt relays are made of

few turns of thin wire
few turns of thick wire
many turns of thin wire
many turns of thick wire

14.Burden of a protective relay is the power

required to operate the circuit breaker
absorbed by the circuit of relay
developed by the relay circuit
none of the above

15.In order that current should flow without causing excessive heating or voltage drop, the relay contacts should

have low contact resistance
be clean and smooth
be of sufficient size and proper shape
have all above properties

More Switchgear Protections QUESTIONS AND ANSWERS available in next pages

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