Quiz on the Four-Stroke Engine

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

What happens during the intake stroke of a four-stroke engine?

• The intake valve opens and the piston moves down.

• The exhaust valve opens.

• The piston moves up the cylinder.

• The spark plug ignites the air-fuel mixture.

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

What is the purpose of the compression stroke?

• To expel burnt gases.

• To draw in air and fuel.

• To compress the air-fuel mixture.

• To create a vacuum.

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

What occurs at the top of the compression stroke?

• The spark plug ignites the mixture.

• The exhaust valve closes.

• The piston moves down.

• The intake valve opens.

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

What is the result of the power stroke?

• The exhaust gases are expelled.

• The air-fuel mixture is compressed.

• The crankshaft is turned.

• The piston moves up the cylinder.

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

During which stroke does the exhaust valve open?

• Intake stroke

• Compression stroke

• Power stroke

• Exhaust stroke

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

What is created when the spark plug ignites the air-fuel mixture?

• Mechanical energy

• Burnt gases

• A vacuum

• A fuel mixture

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

Which component is optional for understanding the four-stroke engine?

• Engine model

• Exhaust valve

• Diagram

• Spark plug

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

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

• Compression, Power, Exhaust, Intake

• Intake, Compression, Power, Exhaust

• Exhaust, Intake, Compression, Power

• Power, Exhaust, Intake, Compression

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

What does the four-stroke engine convert into mechanical energy?

• Air

• Electricity

• Fuel

• Water

How to Understand the Four-Stroke Engine

Objective: To understand the working process of a four-stroke engine.

Materials Needed:

• Diagram of a four-stroke engine

• Engine model (optional)

Steps:

1. Intake Stroke:

   • The intake valve opens, and the piston moves down the cylinder.

   • This creates a vacuum that draws in a mixture of air and fuel into the combustion chamber.

2. Compression Stroke:

   • The intake valve closes, and the piston moves back up the cylinder.

   • This compresses the air-fuel mixture, making it more volatile and ready for ignition.

3. Power Stroke:

   • At the top of the compression stroke, the spark plug ignites the compressed air-fuel mixture.

   • The explosion forces the piston down the cylinder, creating power that turns the crankshaft.

4. Exhaust Stroke:

   • The exhaust valve opens, and the piston moves back up the cylinder.

   • This expels the burnt gases from the combustion chamber through the exhaust valve.

Conclusion: Understanding the four-stroke engine involves knowing the sequence of intake, compression, power, and exhaust strokes. Each stroke plays a crucial role in the engine's operation, converting fuel into mechanical energy efficiently.

What is the main objective of understanding the four-stroke engine?

• To learn about fuel types

• To analyze exhaust emissions

• To understand the working process

• To study engine models