Question

If an engine has a compression ratio of 7:1,

A. the air-and-fuel mixture in the cylinder is squeezed into a space that's seven times smaller during the compression stage
B. the air-and-fuel mixture in the cylinder is squeezed into a space that's seven times larger during the compression stage
C. the engine produces seven times more horsepower than it does torque
D. the engine produces seven times more torque than it does horsepower

Answer 1

A.

Step-by-step 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.