Engine : Electricity - 1295/1386
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| Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out? |
| A) Station a man at the circuit supply switch. |
| B) Bypass the interlocks. |
| C) Secure and tag the supply circuit breaker in the open position. |
| D) De-energize the applicable switchboard bus. |
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