Multiple choice

The difference in a diesel engine from a petrol engine is

  1. no speaking plug

  2. fuel oil of petrol

  3. no carburetor

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Diesel engines differ from petrol engines in three key ways: (1) No spark plugs - ignition is through compression heat, (2) Uses fuel oil (diesel) instead of petrol, (3) No carburetor - uses fuel injectors instead. All these differences combine to make diesel engines more efficient but heavier.

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