A.Scavenging is the process of removing the burnt gas from the engine cylinder by fresh charge coming into cylinder from the crank-case
B.The power developed in four stroke I.S. engine, for the same engine speed and cylinder volume, as compared to that of a two stroke engine is one-half
C.Instead of values, ports are used in case of two-stroke I.C. engines
D.In case of four stroke I.C. engines, the exhaust gases are driven out from engine cylinder by fresh charge of the fuel entering the cylinder