4 Stroke Engine

During the combustion 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

What is it?

• combustion stroke

• comression stroke

• intake stroke

• exhaust stroke

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.

On the exhaust stroke .........

• the intake and the exhaust valves are opened

• the intake valve is closed

• the intake and the exhaust valves are closed

• the exhaust valve opens; the intake valve is closed

The four strokes of an internal combustion engine are

• in, out, combustion, exhaust

• intake, out take, compression, power

• intake, compression, combustion, exhaust

• in, out, power, compression

What are the valves doing on the compression stroke?

• both open

• intake open

  exhaust closed

• Intake closed

  exhaust open

• both closed

Revolutions per minute (RPM) is the measurement of

• Piston Speed
• Camshaft direction
• What stroke is happening
• How fast the crankshaft is turning

The four stroke engine cycle begins with the _______ stroke.

• combustion

• intake

• compression

• exhaust

There are three strokes in the operation of the 4-stroke gas engine

• True

• False