Respuesta :
Answer:
A.
Explanation:
Compression ratio of an engine is defined as the ratio of the volume of gas in cylinder when the position is at TDC ( top dead center ) means top of its stroke to the volume of the gas when piston is at the bottom which is BDC or bottom dead center.
So if an engine has a compression ratio of 7 : 1 then it means the air and fuel mixture in the cylinder is squeezed into a space that is seven times smaller during the compression stage.