A. increase
B. decrease
C. remain same
D. increase upto certain limit and then decrease
E. decrease upto certain limit and then in-crease
Related Mcqs:
- If the intake air temperature of I.C. engine increases, its efficiency will_________________?
A. increase
B. decrease
C. remain same
D. unpredictable
E. depend on other factors - Diesel engines as compared to petrol engines require ______________________?
A. bigger flywheel
B. smaller flywheel
C. same size flywheel
D. no flywheel
E. flywheel whose size may be less or more depending on several other fac-tors - The efficiency of I.C. engines normally is of the order of_________________?
A. 15-20%
B. 20-25%
C. 25-30%
D. 30-35%
E. 35-50% - The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called__________________?
A. net efficiency
B. efficiency ratio
C. relative efficiency
D. overall efficiency
E. cycle efficiency - The air-fuel ratio in petrol engines-is controlled by__________________?
A. controlling valve opening/closing
B. governing
C. injection
D. carburettion
E. scavenging and supercharging - To reduce the possibility of knock in the C.I. engines, the first elements of fuel and air should have_______________?
A. high temperature
B. high density
C. short delay
D. reactive mixture
E. all of the above - Air injection in I.C. engines refers to injection of___________________?
A. air only
B. liquid fuel only
C. liquid fuel and air
D. supercharging
E. does not exist - In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?
A. 0.85
B. 1
C. 1.1 to 1.3
D. 1.2 to 1.5 - Crankcase explosion in I.C. engines usuall occurs as ___________________?
A. first a mild explosion followed by a bi explosion
B. first a big explosion followed by a mil explosion
C. both mild and big explosions occi simultaneously
D. never occurs
E. unpredictable - In order to prevent knock in the S.I. engines, the charge away from the spark plug should have___________________?
A. low temperature
B. low density
C. long ignition delay
D. rich mixture
E. all of the above
