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
Related Mcqs:
- Most high speed compression engines operate on ___________________?
A. Otto cycle
B. Diesel cycle
C. Dual cycle
D. Carnot cycle
E. Two stroke cycle - 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 - 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 - Combustion in compression ignition engines is____________________?
A. homogeneous
B. heterogeneous
C. both A. and B.
D. laminar
E. turbulent - Compression loss in I.C engines occurs due to_________________?
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 - The thermal efficiecny of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will___________________?
A. increase
B. decrease
C. be independent
D. may increase or decrease depending on other factors
E. none of the above - In diesel engine, the compression ratio in comparison to expansion ratio is_______________?
A. same
B. less
C. more
D. variable
E. more/less depending on engine capacity. - The thermal efficiency of a semi-diesel cycle having fixed compression ratio and fixed quantity of heat, with increase in pressure ratio will_______________?
A. increase
B. decrease
C. remain unaffected
D. increase/decrease depending upon engine capacity
E. first increase and then decrease - 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 - 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
