Question 1093 Deck Safety

70% to pass

If you are unable to stop a diesel engine by any other means, you should _______________.

A secure the starting air supply valve
B discharge a CO2 extinguisher in the air inlet
C pull off the distributor cap
D secure the jacket water
AI Explanation

The correct answer is B) discharge a CO2 extinguisher in the air inlet. If you are unable to stop a diesel engine by any other means, discharging a CO2 extinguisher into the air inlet is the correct action to take. CO2 extinguishers work by displacing oxygen, which will effectively starve the engine of the air it needs to continue running, causing it to shut down. The other options are incorrect because securing the starting air supply valve (A) or the jacket water (D) would not immediately stop a running engine, and pulling off the distributor cap (C) would not work on a diesel engine, which does not have a distributor.

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