Air-petrol ratio for maximum power generation in spark ignition engine is about_____________________?
Correct answer: B. 12 : 1
- A. 6 : 1
- B. 12 : 1
- C. 18 : 1
- D. 24 : 1
Explanation
A spark-ignition engine develops maximum power with a fuel-rich mixture, commonly at an air-fuel ratio near 12:1. The stoichiometric petrol ratio is about 14.7:1, while 18:1 and 24:1 are too lean for maximum power.
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