Electrical Engineering Questions And Answers :: Switchgear Protections: part1

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Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part1 : 6 to 10

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

6.A differential relay measures the vector difference between

two currents
two voltages
two or more similar electrical quan�tities
none of the above

7.A thermal protection switch can protect against

over voltage

8.Thermal overload relays are used to protect the motor against over current due to

heavy loads
all of the above

9.The arcing contacts in a circuit breaker are made of

copper tungsten alloy
electrolytic copper
aluminium alloy

10.An efficient and a well designed protective relaying should have

good selectivity and reliability
economy and simplicity
high speed and selectivity
all of the above

More Switchgear Protections QUESTIONS AND ANSWERS available in next pages

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