Question 301Electricity & Electronics - QMED

70% to pass

Before working on an electric cargo winch master switch or controller, what should be done?

Aopen the circuit breaker in the power supply and tag-out
Bheat the switch box to remove any moisture
Cspray the gasket surface with a solvent
Ddrain condensate from the box
AI Explanation

The correct answer is A) open the circuit breaker in the power supply and tag-out. This is the correct answer because it is a critical safety procedure to de-energize the electrical system before working on any components. Opening the circuit breaker and tagging it out ensures that the system cannot be inadvertently energized while personnel are working on it, preventing the risk of electrical shock or other hazards. The other options are incorrect because they do not properly address the safety concerns. Heating the switch box, spraying the gasket with solvent, or draining condensate would not de-energize the system, and could potentially introduce other safety issues.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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