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What is the correct stoichiometric ratio for an air-fuel mixture?

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in Automotive Engine Design by (137k points)
What is the correct stoichiometric ratio for an air-fuel mixture?

(a) 14.7:1

(b) 14:1

(c) 15:1

(d) 9:1

I got this question by my school principal while I was bunking the class.

Asked question is from Petrol Engine Fuel Supply System in division Petrol Engine Fuel Supply System of Automotive Engine Design

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Right choice is (a) 14.7:1

The best explanation: The stoichiometric ratio of air-fuel is 14.7:1. It means that 14.6 parts of air and 1 part of gasoline or petrol (by mass) is the one which would give chemically correct combustion of petrol under ideal conditions.

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