Thermal efficiency of an internal combustion engine is around ______________ percent?
Correct answer: B. 35
- A. 8
- B. 35
- C. 65
- D. 80
Explanation
Typical internal-combustion engines convert roughly one-quarter to one-third of the fuel energy into useful work, so about 35% is the closest value. The larger figures are generally too high for ordinary engines.
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