Question 821 Deck Safety

70% to pass

Which statement is TRUE concerning carbon dioxide?

A It is used on class B and C fires.
B It is heavier than air.
C It is non-conductive.
D All of the above are true.
AI Explanation

The correct answer is D) All of the above are true. 1) Carbon dioxide (CO2) is used on Class B (flammable liquids) and Class C (energized electrical equipment) fires because it is a non-conductive gas that effectively smothers the fire by displacing oxygen. 2) Carbon dioxide is heavier than air, so it settles and remains close to the fire source, continuing to smother the flames. 3) The other options are incorrect because they only state a single true fact about carbon dioxide, whereas the correct answer encompasses all three characteristics.

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