A. leaking piston rings
B. use of thick head gasket
C. clogged air-inlet slots
D. increase in clearance volume caused b bearing-bushing wear
E. all of the above
Related Mcqs:
- 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 - Compression ratio of LC. engines is ___________________?
A. the ratio of volumes of air in cylinder before compression stroke and after compression stroke
B. volume displaced by piston per stroke and clearance volume in cylinder
C. ratio of pressure after compression and before compression
D. swept volume/cylinder volume
E. cylinder volume/swept volume - Most high speed compression engines operate on __________________?
A. Diesel cycle
B. Otto cycle
C. Dual combustion cycle
D. Special type of air cycle
E. Carnot cycle - Most high speed compression engines operate on ___________________?
A. Otto cycle
B. Diesel cycle
C. Dual cycle
D. Carnot cycle
E. Two stroke cycle - Combustion in compression ignition engines is____________________?
A. homogeneous
B. heterogeneous
C. both A. and B.
D. laminar
E. turbulent - Exhaust pipes of engines are covered with insulating marterial in order to_________________?
A. keep the exhaust pipes warm
B. reduce formation of condenstae
C. reduce heat transfer to the engine room
D. increase engine efficiency
E. conserve heat - 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 - Violent sound pulsations within the cylinder of an I.C. engine are caused due to_________________?
A. heavy turbulence
B. improved scavenging
C. heavy supercharging
D. detonation
E. preignition - 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 - The knocking in diesel engines for given fuel, will be__________________?
A. enhanced by increasing compression ratio
B. enhanced by decreasing compression ratio
C. unaflected by compression ratio
D. first enhanced by increasig compression ratio upto a limit beyond which it will be suppressed
E. dependent on other factors
