Small Engine Principles of Operation Test

1) ? Downward movement of piston which permits fuel-air-mixture to enter cylinder. Intake Valve is open, Exhaust valve is closed

2) ? Upward movement of the piston which compresses fuel-air mixture Both valves are closed

3) ? Downward piston movement caused by spark ignition of compressed fuel-air mixture Both valves remain closed

4) ? Upward piston movement which expels burnt gas from the cylinder Exhaust valve opens releasing burnt gases from the cylinder

5) ? I C P E