Multiple choice

The most efficient engine is _____ engine.

  1. petrol

  2. diesel

  3. electric

  4. steam
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electric engines have the highest efficiency among all engine types because they convert electrical energy directly to mechanical energy with minimal losses. Petrol and diesel engines have significant thermal losses, while steam engines are the least efficient due to multiple energy conversions.

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