🔍 Key Concepts

• How a diesel engine ignites fuel compared to a gasoline engine • What happens if you cut off air to a running diesel engine • Which listed components (distributor cap, jacket water, starting air) are used only for starting or ignition, not for stopping

💭 Think About

• First, ask yourself: Do diesel engines use a distributor and spark system like gasoline engines, or do they rely on something else to ignite fuel? • Next, think: Once a diesel engine is already running, will closing the starting air supply actually make it stop, or does that only affect cranking? • Finally, consider: Which option would most directly prevent the engine from getting what it needs right now to keep running – fuel, air, or cooling?

✅ Before You Answer

• Identify which choice deals with the air entering the engine while it is running, not just air used to start it • Eliminate any option that refers to a part not normally found on a diesel engine • Be careful not to pick an option that only removes cooling (jacket water) instead of something the engine needs immediately to operate