Top 80+ Solved Fuels and its Supply System SI and CI engine MCQ Questions Answer
Q. Fuel is injected in a four-stroke CI engine
a. at the end of suction stroke
b. at the end of expansion stroke
c. at the end of compression stroke
d. at the end of exhaust stroke
Q. Injection system in which the pump and the injector nozzle is combined in one housing is known as
a. common rail system
b. distributor system
c. unit injector system
d. individual pump and nozzle system
Q. Main advantage of pintaux nozzle is
a. better cold starting performance
b. ability to distribute the fuel
c. good penetration
d. good atomization
Q. the most accurate gasoline injection system is
a. direct injection
b. port injection
c. throttle body injection
d. manifold injection
Q. Advantage of fuel injection in SI engine is
a. low initial cost
b. low maintenance requirements
c. increased volumetric efficiency
d. none of the above
Q. ‘MPFI’ stands for
a. Multi point fuel injection
b. Multi port fuel injection
c. Manifold point fuel injection
d. Manifold port fuel injection
Q. In carburetor, Choke is incorporated
a. Before the venturi
b. After the venturi
c. In the venturi
d. Any of the above
Q. The following factors affect the process of carburetion
a. Engine speed
b. The temperature of incoming air
c. The volatility of fuel
d. All of the above
Q. In MPFI _____ is used to spray fuel into engine.
a. Engine vacuum
b. Suction pressure of engine
c. Electric pump
d. None of the above
Q. L-MPFI system uses
a. port injection
b. direct injection
c. manifold injection
d. throttle body injection
Q. D-MPFI system uses
a. port injection
b. manifold injection
c. direct injection
d. throttle body injection
Q. Common rail injection system uses injection pressures of the order
a. 100-200 bar
b. 200-400 bar
c. 400-600 bar
d. 1500 bar
Q. The cold start injector
a. maintain stoichiometric air-fuel ratio
b. provides lean air-fuel ratio
c. gives rich air-fuel ratio
d. is not used for any of the above functions
Q. ECU is an electronic injection system used for
a. calculating the appropriate injection timing
b. meeting only certain operating conditions
c. closing the injection valve only
d. none of the above