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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