Understanding the Four Stroke Engine

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

• To ignite the air-fuel mixture

• To draw air and fuel into the cylinder

• To expel exhaust gases

• To compress the air-fuel mixture

During the compression stroke, what happens to the air-fuel mixture?

• It is ignited by the spark plug

• It is expelled from the cylinder

• It is compressed to a smaller volume

• It is mixed with exhaust gases

Which component is responsible for igniting the air-fuel mixture during the power stroke?

• Piston

• Crankshaft

• Spark plug

• Exhaust valve

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

• To compress the air-fuel mixture

• To draw in fresh air and fuel

• To convert fuel energy into mechanical work

• To expel exhaust gases

During the exhaust stroke, what happens to the exhaust gases?

• They are compressed

• They are expelled from the cylinder

• They are mixed with fresh air

• They are ignited

In which stroke does the piston move upwards, compressing the air-fuel mixture?

• Intake stroke

• Compression stroke

• Power stroke

• Exhaust stroke

What is the sequence of strokes in a four-stroke engine cycle?

• Intake, Power, Compression, Exhaust

• Compression, Intake, Power, Exhaust

• Intake, Compression, Power, Exhaust

• Power, Exhaust, Intake, Compression

Which stroke is responsible for removing burnt gases from the cylinder?

• Intake stroke

• Compression stroke

• Power stroke

• Exhaust stroke

What happens to the piston during the power stroke?

• It moves upwards

• It remains stationary

• It moves downwards

• It rotates

In a four-stroke engine, which stroke directly follows the power stroke?

• Intake stroke

• Compression stroke

• Exhaust stroke

• Another power stroke