Four Stroke Engine Cycle

During which stroke of the four-stroke engine cycle does a valve open and the piston move downward, allowing the air-fuel mixture to enter the combustion chamber?

• During the intake stroke.

• During the compression stroke.

• During the exhaust stroke.

• During the power stroke.

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

• To ignite the air-fuel mixture in the combustion chamber.

• To increase the temperature and pressure of the air-fuel mixture in the combustion chamber.

• To intake the air-fuel mixture into the combustion chamber.

• To exhaust the burned gases from the combustion chamber.

Tags

NGSS.MS-PS2-2

Which stroke of the four-stroke engine cycle is responsible for generating power?

• intake stroke

• exhaust stroke

• compression stroke

• combustion stroke

What happens during the exhaust stroke of a four-stroke engine cycle?

• The spark plug ignites the fuel-air mixture, causing combustion.

• The piston moves upward, compressing the fuel-air mixture in the cylinder.

• A valve opens and the fuel-air mixture is drawn into the cylinder.

• A valve opens and the burned gases are expelled from the cylinder.

Which stroke of the four-stroke engine cycle is also known as the ignition stroke?

• exhaust stroke

• power stroke

• intake stroke

• compression stroke

Tags

NGSS.MS-PS3-3

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

• To expel the exhaust gases from the combustion chamber.

• To ignite the air-fuel mixture in the combustion chamber.

• To draw in the air-fuel mixture into the combustion chamber.

• To compress the air-fuel mixture in the combustion chamber.

During which stroke of the four-stroke engine cycle does the air-fuel mixture increase in pressure?

• During the compression stroke.

• During the exhaust stroke.

• During the intake stroke.

• During the power stroke.

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

• To convert pressure into mechanical work.

• To generate electricity.

• To cool down the engine.

• To increase fuel efficiency.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What happens during the spark ignition stroke of a four-stroke engine cycle?

• The intake valve opens and allows air-fuel mixture into the combustion chamber

• The exhaust valve opens and releases the exhaust gases

• The piston compresses the air-fuel mixture in the combustion chamber

• The air-fuel mixture in the combustion chamber ignites, causing a rapid expansion of gases.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which stroke of the four-stroke engine cycle expels the burnt fuel from the combustion chamber?

• exhaust stroke

• compression stroke

• intake stroke

• power stroke