What is the primary purpose of gasoline’s volatility in a motor vehicle fuel system?
To ensure rapid vaporization for ignition
Volatility describes how readily a liquid fuel evaporates into vapour.
A petrol engine burns an air-fuel mixture that must be in vapour form for the spark to ignite it reliably.
Gasoline is made volatile so it vaporizes rapidly and mixes with air, ensuring easy ignition and smooth combustion, especially on cold starts.
Octane rating relates to knock resistance, not evaporation, and volatility does not itself cut emissions or prevent corrosion.
Hence, the answer is to ensure rapid vaporization for ignition.
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Important Questions from Fuels and Combustion
Theoretically, ignition in an engine should occur at:
In a Distributor less ignition system the distributor is replaced by:
In distributor-less ignition systems, ignition can be adjusted manually by:
What is the approximate ideal (stoichiometric) air-fuel ratio for complete combustion in a petrol (gasoline) engine?
A ballast resistor is used in which of the following systems?
