Top 250+ Solved Internal Combustion Engines (I.C. Engines) MCQ Questions Answer
Q. Advantage of reciprocating IC engines over steam turbine is
a. Mechanical simplicity
b. Improved plant efficiency
c. Lower average temperature
d. all of the above
Q. The intake charge in a diesel engine consists of
a. air alone
b. air + lubricating oil
c. air + fuel
d. air + fuel + lubricating oil
Q. Engines of different cylinder dimensions, power and speed can be compared on the basis of
a. Maximum pressure
b. Fuel consumption
c. mean effective pressure
d. unit power
Q. Disadvantages of reciprocating IC engine are
a. vibration
b. use of fossil fuels
c. balancing problems
d. all of the above
Q. Gudgeon pin forms the link between
a. piston and big end of connecting rod
b. piston and small end of connecting rod
c. connecting rod and crank
d. big end and small end
Q. In a four-stroke IC engine cam shaft rotates at
a. same speed as crankshaft
b. twice the speed of crankshaft
c. halt the speed of crankshaft
d. none of the above
Q. Thermal efficiency of CI engine is higher than that of SI engine due
a. light weight
b. higher compression ratio
c. constant pressure heat addition
d. none of the above
Q. SI engines are of
a. light weight
b. high speed
c. homogeneous change of fuel and oil
d. all of the above
Q. Main advantage of a two-stroke engine over four-stroke engine is
a. more uniform torque on the crankshaft
b. more power output for the cylinder of same dimensions
c. absence of valves
d. all of the above
Q. Engines used for ships are normally
a. four-stroke Sl engines of very high power
b. two-stroke CI engines of very high power
c. four-stroke Cl engines of high speed
d. two-stroke SI engines of high power
Q. If L is the stroke and N is the rpm, mean piston speed of two-stroke engine
a. LN
b. LN/2
c. 2LN
d. none of the above
Q. The volumetric efficiency of the SI engine is comparatively
a. lower than CI engine
b. higher than CI engine
c. will be same as CI engine
d. none of the above
Q. Brake specific fuel consumption is defined as
a. fuel consumption per hour
b. fuel consumption per km
c. fuel consumption per BP
d. fuel consumption per brake power hour