
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 2024 and IES 2024 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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