2 and 4 Stroke Video Questions v2

How many strokes does a piston complete in a two-stroke engine?

• Four

• Three

• Two

• One

What is the purpose of the intake stroke in a four-stroke engine?

• Releasing a spark

• Pushing out the exhaust

• Letting in a mixture of air and fuel

• Compressing the air-fuel mixture

What is the function of the crankcase in a two-stroke engine?

• Drawing air and fuel into the crankcase

• Capturing energy released by the ignition of the fuel

• Acting as an air chamber or reservoir

• Pushing out the exhaust from the cylinder

What is a disadvantage of two-stroke engines in terms of lubrication?

• The oil burns up in the combustion chamber

• The lack of a dedicated lubrication system

• The oil is expensive

• The oil and gas together combust worse than gasoline alone

What are the four strokes in a four-stroke engine?

• Inlet, contraction, combustion, evacuation

• Intake, compression, ignition, exhaust

• Ingestion, compression, ignition, emission

• Intake, compression, combustion, exhaust

What is the main difference in the combustion cycle between a four-stroke and a two-stroke engine?

• The length of the piston

• The use of a camshaft

• The presence of a reed valve

• The number of strokes required to complete one combustion cycle