Question 652 Deck Safety

70% to pass

You have carbon tetrachloride as part of the cargo. If a fire breaks out in the general area, what is the major danger from the carbon tetrachloride?

A It will burn rapidly once ignited.
B You cannot use water to fight the fire because it will react with the carbon tetrachloride.
C It will explode if exposed to a flame.
D Phosgene gas may be formed if it comes in contact with hot metal.
AI Explanation

The correct answer is D) Phosgene gas may be formed if it comes in contact with hot metal. The reason this is the correct answer is that carbon tetrachloride is a halogenated compound, and when it is exposed to high heat or flames, it can break down and release phosgene gas, which is a highly toxic substance. Phosgene gas is extremely dangerous and can cause severe respiratory distress and other health issues. The other answer choices are incorrect because: A) Carbon tetrachloride is not flammable and will not burn rapidly; B) Water can be used to fight the fire, but it must be used with caution to avoid the formation of phosgene gas; and C) Carbon tetrachloride will not explode when exposed to a flame.

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