Question 1085 Deck Safety

The correct answer is D) natural aspiration. Diesel engines obtain combustion air through natural aspiration, which means they rely on the natural flow of air into the engine's cylinders without the aid of forced induction systems like turbochargers or blowers. Diesel engines are designed to operate on the principle of compression ignition, where the air is drawn into the cylinders and then compressed, causing the fuel to ignite without the need for spark plugs or carburetors. The other options are incorrect because air receivers are used for storing compressed air, carburetors are used in gasoline engines, and air starters are used to start the engine, not to provide combustion air.