A. supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
B. providing forced cooling air
C. injecting excess fuel for raising more load
D. supplying compressed air to remove combustion products fully
E. raising exhaust pressure

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

A. kcal
B. kcal/kg
C. kcal/m2
D. kcal/m²
E. all of the above

A. low heat value of oil
B. high heat value of oil
C. net claorific value of oil
D. calorific value of fuel
E. all of the above

A. low heat value of oil
B. high heat value of oil
C. net calorific value of oil
D. calorific value of fuel
E. all of the above

A. high heat value
B. low heat value
C. net calorific value
D. middle heat value
E. calorific value

A. 4 – 6 kg/cm2 and 200 – 250°C
B. 6 – 12 kg/cm2 and 250 – 350°C
C. 12 – 20 kg/cm2 and 350 – 450°C
D. 20 – 30 kg/cm2 and 450 – 500°C
E. 30 – 40 kg/cm2 and 500 – 700°C

A. 500- 1000°C
B. 1000- 1500°C
C. 1500-2000°C
D. 2000-2500°C
E. 2500-3000°C

A. 5-10 kg/cm2
B. 20-25 kg/cm2
C. 60-80 kg/cm2
D. 90-130 kg/cm2
E. 150-250 kg/cm2

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