Title: Describe the fuel-air mixture.
Course: Aircraft Pilot Training I (20053-I) > Section: Examining Aircraft Instruments, Components, Systems, and Performance

Description should include the following:

- The intake stroke begins as the piston starts its downward travel. When this happens, the intake valve opens and the fuel-air mixture is drawn into the cylinder.
- The intake, compression, power, and exhaust processes occur in four separate strokes of the piston.

PLT249