Top 80+ Solved Fuels and its Supply System SI and CI engine MCQ Questions Answer
Q. The limits of air-fuel for SI engine are
a. 8/1 to 18/1
b. 8/1 to 50/1
c. 25/1 to 50/1
d. 50/1 to 100/1
Q. For maximum thermal efficiency, the fuel-air mixture in SI engines should be
a. lean
b. rich
c. stoichiometric
d. may be rich or lean
Q. During starting petrol engines require
a. stoichiometric mixture
b. lean mixture
c. rich mixture
d. any air-fuel ratio is alright
Q. Economizer is used to provide enriched mixture during
a. Starling
b. idling
c. cruising
d. full throttle operation
Q. When the throttle is suddenly opened, the mixture of the simple carburetor tends tobecome
a. rich
b. lean
c. stoichiometric
d. not affected
Q. Precise petrol injection system is
a. direct injection
b. sequential injection
c. throttle body injection
d. port injection
Q. The choke in an automobile meant for supplying
a. lean mixture
b. rich mixture
c. stoichiometric mixture
d. weak mixture
Q. Modern carburetors provide the correct quality of air-fuel mixture during
a. starting
b. idling
c. cruising
d. all conditions
Q. A simple carburetor supplies rich mixture during
a. starting
b. idling
c. cruising
d. accelerating
Q. Advantage of air injection system is
a. cheaper fuels can be used
b. mep is high
c. fine atomization and distribution of the fuel
d. all of the above
Q. Commonly used injection system in automobiles is
a. air injection
b. solid injection
c. combination of (a) and (b)
d. none of the above
Q. Fuel injection pressure in solid injection system is around
a. <10 bar
b. 10-20 bar
c. 30-50 bar
d. 200-250 bar