Internal Combustion Engine Quiz

During which stroke does the intake valve open?

• Induction

• Compression

• Expansion (power)

• Exhaust

What happens during the compression stroke?

• The intake valve opens

• The intake valve closes

• The exhaust valve opens

• The piston moves downward

What happens to the mixture of air and fuel during the compression stroke?

• It is drawn into the cylinder

• It is compressed in the cylinder

• It is expelled from the cylinder

• It is ignited

What is the only stroke in the cycle that supplies energy to the engine?

• Induction

• Compression

• Power

• Exhaust

Which stroke involves the rapid expansion of the fuel mixture creating high pressure?

• Induction

• Compression

• Power

• Exhaust

What is the role of the spark plug in the power stroke?

• To expel exhaust gases

• To ignite the fuel mixture

• To compress the air-fuel mixture

• To open the intake valve

Which stroke follows the power stroke in the four-stroke cycle?

• Induction

• Compression

• Power

• Exhaust

What is the purpose of the intake valve during the induction stroke?

• To expel exhaust gases

• To allow the air-fuel mixture to enter

• To ignite the fuel mixture

• To compress the air-fuel mixture

What is valve lag?

• When a valve opens before BDC

• When a valve opens before TDC

• When a valve remains open after TDC or BDC

• When two valves are open at the same time

What is overlap in valve timing?

• When a valve opens before TDC or BDC

• When a valve remains open after TDC or BDC

• When both valves are open at the same time

• When a valve opens after TDC or BDC