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| Q. |
When does the circuit breaker operate in the line? |
| A. | When power is to be supplie(D) |
| B. | When the line is to be teste(D) |
| C. | Whenever the fault occurs in the line. |
| D. | Whenever the switch and the relay has to be operate(D) |
| Answer» C. Whenever the fault occurs in the line. | |
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