Isolators - MCQs with answers

Isolators - MCQs with answers

Q1. Why is an isolator installed?

a. To isolate one portion of the circuit from another
b. As an substitute for the circuit breaker
c. It used on either sides of the circuit breaker
d. Both (a) and (c)

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Q2. For which among the following the current ratings are not required?

a. Circuit breakers
b. Relays
c. Isolators
d. Load break switch

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Q3. The isolators used in the transmission lines are capable of breaking

a. Fault current
b. No current
c. Charging current
d. Load current

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Q4. Why are the isolators used?

a. Break abnormal current
b. Making under fault conditions
c. Breaking the circuit under no load condition
d. None of the above

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Q5. What is the major cause of the failure of the circuit breaker?

a. Trip circuit open
b. Trip latch defective
c. Spring defective
d. All of these

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