Four Stroke Engine

​Assessment

Match

Match the following

• Ignition of the compressed air/fuel mixture occurs

• The air/fuel mixture becomes compressed in the cylinder

• The used air/fuel mixture is released

• Fuel and air are obtained in the cylinder

Power stroke

Compression stroke

Exhaust stroke

Intake stroke

• Power stroke

• Compression stroke

• Exhaust stroke

• Intake stroke

Multiple Choice

The power stroke is also known as which of the following?

• Combustion stroke

• Internal stroke

• External stroke

• Cylinder stroke

Multiple Choice

During the compression stroke, what are the positions of the valves?

• Intake valve is closed and exhaust valve is open

• Intake valve is open and exhaust valve is closed

• Both valves are open

• Both valves are closed

Multiple Choice

During the intake stroke, the piston approaches the bottom of the cylinder, which is also known as which of the following?

• Pit

• End of rotation

• Bottom dead center

• Closure

Labeling

Label the following picture

Drag labels to their correct position on the image

Piston

Crankshaft

Air/Fuel Mixture

Intake Valve

Exhaust Valve

Multiple Choice

Which of the following is NOT a cause of abnormal combustion mentioned in the presentation?

• Pre-ignition

• Deterioration

• Engine overload

• Improper ignition timing

Multiple Choice

Which of the following may leave excessive carbon residue in the combustion chamber resulting in abnormal combustion?

• Detonation

• Exhaust fumes

• Using low quality-fuel

• Pre-ignition

Multiple Choice

Which of the following creates multiple combustion waves and may make the engine components resonate?

• Resonation

• Faulty glow plug

• Rich air/fuel mixture

• Detonation

Match

Match the following

Compression stroke

Exhaust stroke

Intake stroke

Power (Combustion) stroke

• Compression stroke

• Exhaust stroke

• Intake stroke

• Power (Combustion) stroke

Multiple Choice

In which direction does the piston move during the power stroke?

• Downward

• Upwards

• It stays in the same place

• Side to side