Top 250+ Solved Internal Combustion Engines (I.C. Engines) MCQ Questions Answer
Q. Which of the following is the lightest and most volatile liquid fuel
a. diesel
b. kerosene
c. fuel oil
d. gasoline
Q. The theoretically correct air fuel ratio for petrol engine is of the order of
a. 6 : 1
b. 9 : 1
c. 12 : 1
d. 15 : 1
Q. Air fuel ratio for idling speed of a petrol engine is approximately
a. 1 : 1
b. 5 : 1
c. 10:1
d. 15 : 1
Q. Air fuel ratio at which a petrol engine can not work is
a. 8 : 1
b. 10 : 1
c. 15 : 1
d. 20 : 1 and less
Q. Advantage of gaseous fuel is that
a. it can be stored easily
b. it can mix easily with air
c. it can displace more air from the engine
d. all of the above
Q. Paraffins have molecular structure of
a. chain saturated
b. chain unsaturated
c. ring saturated
d. ring unsaturated
Q. Hydrocarbons are decomposed into smaller hydrocarbons by
a. reforming
b. refining
c. cracking
d. polymerization
Q. The molecular structure of the straight-run gasoline is changed by
a. cracking
b. reforming
c. reining
d. boiling
Q. Ignition quality of diesel fuel is indicated by its
a. octane number
b. cetane number
c. fash point
d. fire point
Q. Flash point of fuel oil is
a. minimum temperature to which1 oil is heated in order to give off inflammable vapours in Sufficient quantity to ignite momentarily when brought in contact with a flame
b. temperature at which it solidifies or congeals
c. temperature at which it catches fire without external aid
d. indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off