Multiple choice general knowledge

Approximate thermal Efficiency of 'Petrol' Engine is:

  1. 28%

  2. 30%

  3. 36%

  4. 45%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Petrol engines typically convert only about 25-30% of fuel energy into mechanical work, with the rest lost as heat through exhaust and cooling systems. This relatively low efficiency compared to diesel engines (40-45%) is due to petrol's lower compression ratio and combustion characteristics.

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