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 2024 and IES 2024 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 |
| short-circuit |
| temperature |
| overload |
| over voltage |
8.Thermal overload relays are used to protect the motor against over current due to |
| short-circuits |
| heavy loads |
| grounds |
| all of the above |
9.The arcing contacts in a circuit breaker are made of |
| copper tungsten alloy |
| porcelain |
| 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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