Question 1073 Deck Safety

The correct answer is B) heat of compression. In a marine diesel engine, the fuel is ignited by the heat generated from the compression of the air in the combustion chamber, rather than by a spark or glow plugs. This is a fundamental principle of how a diesel engine operates. The high compression ratio in a diesel engine causes the air to become extremely hot, which then ignites the injected fuel, initiating the combustion process. The other answer choices are incorrect because magnetos (A) are used to provide the spark for ignition in gasoline engines, glow plugs (C) are used to aid starting in cold conditions, and spark plugs (D) are also used in gasoline engines, not diesel engines.