Grade 12 Quiz

Which of the following is NOT a stroke in a four-stroke engine?

• Intake

• Compression

• Expansion

• Rotation

In a four-stroke engine, during which stroke does the fuel-air mixture ignite?

• Compression

• Intake

• Power

• Exhaust

True or False: The exhaust stroke expels burned gases from the engine's cylinder.

• True

• False

The primary purpose of the compression stroke is to:

• Allow fuel into the cylinder

• Compress the air-fuel mixture

• Burn the fuel

• Release exhaust gases

In the four-stroke engine cycle, how many crankshaft rotations occur for every complete cycle?

• 1

• 2

• 4

• 3

True or False: In a four-stroke engine, fuel injection can occur at different points during the intake stroke depending on the engine design.

• True

• False

Which component opens and closes to allow air and fuel into the cylinder during the intake stroke?

• Piston

• Crankshaft

• Valve

• Camshaft

True or False: The power stroke is also called the combustion stroke because it involves the explosion of the air-fuel mixture.

• True

• False

Which of the following strokes removes exhaust gases from the cylinder?

• Power

• Compression

• Intake

• Exhaust

What is the function of the crankshaft in a four-stroke engine?

• To compress air

• To ignite the fuel-air mixture

• To convert linear piston motion to rotational motion

• To inject fuel into the cylinder