Title: Explain the four strokes and their functions.
Course: Small Engine Technology I (20110-I) > Section: Understanding Four-Stroke Engine Operation Theory and Components

Explanation should include

- intake
- compression
- power
- exhaust.

Process/Skill Questions:

- How does understanding four-stroke theory benefit the small engine technician?
- When the intake valve is open and the piston is traveling down, what stroke is occurring?
- When the exhaust valve is open and the piston is traveling up, what stroke is occurring?
- What does TDC stand for?
- What does BDC stand for?
- What is compression ratio, and how does it affect an engine?