Question 735 Deck Safety

70% to pass

What can be used to measure the percentage of oxygen inside a chain locker?

A H2S meter
B Flame safety lamp
C Combustible gas indicator
D Oxygen indicator
AI Explanation

The correct answer is D) Oxygen indicator. An oxygen indicator is the appropriate tool to measure the percentage of oxygen inside a chain locker. Chain lockers are enclosed spaces that can become oxygen-deficient due to the rust and corrosion of the chain, which can consume oxygen. Measuring the oxygen level is crucial to ensure the safety of personnel entering the space. Other devices like H2S meters, flame safety lamps, and combustible gas indicators are not designed to specifically measure oxygen concentration, making them unsuitable for this purpose.

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Official Resources
46 CFR Lifesaving Equipment USCG Marine Safety Center USCG National Maritime Center
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