2 Stroke Vs. 4 Stroke Video Questions

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 function of the intake stroke in a four-stroke engine?

• To compress the air-fuel mixture

• To expel the exhaust gases

• To ignite the air-fuel mixture

• To draw in the air-fuel mixture

What is the purpose of the reed valve in a two-stroke engine?

• To prevent air and fuel from escaping through the exhaust port

• To allow exhaust gases to exit the cylinder

• To compress the air-fuel mixture

• To draw in the air-fuel mixture

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

• To draw in the air-fuel mixture

• To compress the air-fuel mixture

• To ignite the air-fuel mixture

• To open and close the intake and exhaust valves

What is the main drawback of the two-stroke engine design?

• It has a higher fuel consumption

• It has a lower compression ratio

• It allows unburnt fuel to be dumped out the exhaust

• It has a longer combustion cycle

What is the role of the crankshaft in both four-stroke and two-stroke engines?

• To open and close the intake and exhaust valves

• To convert the reciprocation of the piston into the rotation of the crankshaft

• To compress the air-fuel mixture

• To draw in the air-fuel mixture

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