Principles of Engine Operation

Select the proper order of the four strokes in an engine.

• Compression, Exhaust, Power, Intake

• Intake, Power, Exhaust, Compression

• Intake, Compression, Power, Exhaust

• Compression, Intake, Exhaust, Power

During an intake stroke the _______ moves downward and creates a___________

• Piston + Positive Pressure
• Piston + Vacuum
• Flywheel + Spark
• Piston + Explosion

During an intake stroke the intake valve is _________

• Pressurized
• Inactive
• Closed
• Opened

During a compression stroke the _______ moves upward and ___________

• Flywheel + the exhaust valve is opened

• Piston + the intake valve is opened
• Piston + compresses fuel air mixture
• Muffler + Both valves are opened

During a power stroke the piston moves downward with_____  ___________

• A Vaccum
• Great Force
• an intake

• Valves Opened

During a power stroke ____ valves are _______

• Both + Closed
• Intake + Opened

• Both + Inactive
• None of the above

During the exhaust stroke the piston moves______

• Up
• Down
• Sideways
• The Intake vavle

The intake valve is associated with the _________

• Flywheel
• Muffler
• Carburetor
• Sump

The exhaust valve is associated with the _________

• Flywheel
• Muffler
• Carburetor
• Sump

Spark occurs between the _____ stroke + the ______ stroke 

• Compression + Power
• Compression + Exhaust
• Power + Exhaust
• Intake + Compression