What is relative fuel-air ratio?
What is relative fuel-air ratio?
Options:
a. the ratio of mass of fuel to mass of air in fuel and air mixture
b. the ratio of mass of air to mass of fuel in fuel and air mixture
c. the ratio of actual fuel-air ratio to Stoichiometric fuel-air ratio
d. the ratio of Stoichiometric fuel-air ratio to actual fuel-air ratio
Correct Answer: c. the ratio of actual fuel-air ratio to Stoichiometric fuel-air ratio
Explanation:
Air-fuel ratio is the ratio of mass of air to the mass of fuel in air-fuel mixture while the fuel-air ratio is the ratio of mass of fuel to the mass of air in air-fuel mixture.
Relative fuel-air ratio can be defined as the ratio of actual fuel-air ratio to the Stoichiometric fuel-air ratio.
Relative fuel-air ratio, (FR) = (actual fuel-air ratio) / Stoichiometric fuel-air ratio
Stoichiometric fuel-air ratio is the ratio of mass of fuel to mass of air when the fuel burns completely for the minimum supply of air.
