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
Supercharging is the process of_____________________?
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
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
The calorific value of gaseous fuels is expressed in terms of__________________?
A. kcal
B. kcal/kg
C. kcal/m2
D. kcal/m²
E. all of the above
All heat engines utilize_____________________?
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
Fuel oil consumption guarantees for I .C. engine are usually based on__________________?
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