How are all diesel engines classified?

Question 1 / 2707066636eec28f7522a1c51c1b7

Question 1 of 2707066636eec28f7522a1c51c1b7

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Question 1 of 27070

Q

How are all diesel engines classified?

🔍 Key Concepts

• How a diesel engine ignites fuel compared to a gasoline (petrol) engine • Difference between internal vs external combustion engines • What the terms vacuum ignition, compression, and four cycle actually describe

💭 Think About

• Think about what physically causes the fuel–air mixture to burn in a diesel engine. Is it a spark, heat from compression, or something else? • Ask yourself: is "four cycle" a type of ignition, or does it describe how many strokes are in the engine’s operating cycle? • Consider whether "external combustion" matches what happens in an engine where fuel burns inside the cylinder.

✅ Before You Answer

• Identify which option describes an ignition method rather than a full engine cycle or a combustion location. • Confirm that in a diesel engine, the fuel burns inside the cylinder, not in a separate boiler or furnace. • Make sure you can explain in your own words how heat is produced in the cylinder right before the fuel is injected.

Question 1 of 27070

Q

How are all diesel engines classified?

A

Vacuum ignition

B

External combustion

C

Compression ignition

D

Four cycle

Question 1 / 2707066636eec28f7522a1c51c1b7

Question 1 of 2707066636eec28f7522a1c51c1b7

How are all diesel engines classified?

Back

Question 1 of 27070

Q

How are all diesel engines classified?

🔍 Key Concepts

• How a diesel engine ignites fuel compared to a gasoline (petrol) engine • Difference between internal vs external combustion engines • What the terms vacuum ignition, compression, and four cycle actually describe

💭 Think About

• Think about what physically causes the fuel–air mixture to burn in a diesel engine. Is it a spark, heat from compression, or something else? • Ask yourself: is "four cycle" a type of ignition, or does it describe how many strokes are in the engine’s operating cycle? • Consider whether "external combustion" matches what happens in an engine where fuel burns inside the cylinder.

✅ Before You Answer

• Identify which option describes an ignition method rather than a full engine cycle or a combustion location. • Confirm that in a diesel engine, the fuel burns inside the cylinder, not in a separate boiler or furnace. • Make sure you can explain in your own words how heat is produced in the cylinder right before the fuel is injected.