what is an engine compression stroke?\na) when the piston moves down drawing air and fuel into the…

what is an engine compression stroke?\na) when the piston moves down drawing air and fuel into the cylinder.\nb) when the piston moves up causing the air/fuel mixture to compress.\nc) when the spark plug ignites causing compression to occur.\nd) when the piston moves up forcing the exhaust to compress.

what is an engine compression stroke?\na) when the piston moves down drawing air and fuel into the cylinder.\nb) when the piston moves up causing the air/fuel mixture to compress.\nc) when the spark plug ignites causing compression to occur.\nd) when the piston moves up forcing the exhaust to compress.

Answer

Brief Explanations:

In an engine, during the compression stroke, the piston moves upwards. This action compresses the air - fuel mixture inside the cylinder. Option A describes the intake stroke, option C describes the power stroke where ignition occurs, and option D is incorrect as the exhaust is not compressed during the compression stroke.

Answer:

B. When the piston moves up causing the air/fuel mixture to compress.