Title: Explain how pistons and the compression system work.
Course: Small Engine Repair (20110-18) > Section: Examining Internal Engine Parts

Explanation should include how the piston and piston rings seal to create compression in the cylinder bore (combustion chamber) to make the air/gas mixture more combustible.

Process/Skill Questions:

- What is the job of the piston?
- What are the parts of the engine that help the piston do its job?
- What are the four strokes that the piston must go through for the engine to function properly?