Correct Answer:
C. 25–45%
Correct answer: 25–45%. A diesel engine converts about 25–45% of fuel energy into useful work.
Background: Diesel engines are generally more efficient than petrol engines.
- 20–25%: 20–25% is too low for a diesel engine.
- 25–30%: 25–30% is lower than the range given.
- 50–60%: 50–60% is higher than real diesel engines achieve.
Did you know? Large diesel engines are the more efficient ones.
Memory trick: Diesel: 25–45%.