Motion

What is the order of operation of a 4 stroke engine

• Intake, Power, Compression, Exhaust
• Exhaust, Intake, Compression, Power
• Intake, Compression, Power, Exhaust
• Compression, Exhaust, Power, Intake

During the first stroke (Intake), what valves are open-if any?

• Both closed

• Intake valve open, Exhaust closed.

• Both are open

• Intake valve closed, Exhaust valve open.

During the compression stroke the piston moves________

• up
• in both directions
• the hot gasses out of the cylinder
• down

During the power stroke the piston moves________

• up
• down slighty
• in both directions
• down

During the exhaust stroke the piston moves________

• up
• in both directions
• the head bolts
• down

in the Power stroke of an engine, the fuel and air is compressed and ignited by the?

• high pressure
• spark plug
• piston movement
• high temperature

In which event is the piston driven down by the expansion of the burning air/fuel mixture?

• Intake

• Compression

• Power

• Exhaust

In a four stroke engine, gasoline must be mixed with the correct amount of _____________.

• Water

• Oil

• Carbon dioxide

• Air

The intake stroke is followed by the power stroke.

• True

• False

What stroke is being represented by the image ?

• Intake

• Compression

• Power

• Exhaust