Which sequence correctly represents the safe isolation procedure before maintaining dangerous machinery?

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Multiple choice — select the best answer

AIsolate, repair, switch on, test
BSwitch off, lock off, repair, test
CSwitch off, isolate, lock, test
DSwitch off, isolate, repair, test

✓ Correct answer: C. Switch off, isolate, lock, test Safe isolation ensures equipment is dead before work starts. The correct sequence is: switch off, isolate, lock off, then test.

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Which sequence correctly represents the safe isolation procedure before maintaining dangerous machinery?

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