Science Week 14 Inventions: Internal Combustion Engine

Front

What is the primary function of an internal combustion engine?

Back

To convert fuel into mechanical energy through combustion.

Front

What type of fuel is commonly used in internal combustion engines?

Back

Gasoline, diesel, or alternative fuels.

Front

What are the main components of an internal combustion engine?

Back

Cylinders, pistons, crankshaft, camshaft, and valves.

Front

What is the process of combustion in an internal combustion engine?

Back

The chemical reaction between fuel and oxygen that produces heat and expands gases.

Front

What is the difference between a two-stroke and a four-stroke engine?

Back

A two-stroke engine completes a power cycle in two strokes of the piston, while a four-stroke engine completes it in four strokes.

Front

What role do spark plugs play in an internal combustion engine?

Back

They ignite the air-fuel mixture in gasoline engines.

Front

What is the significance of the compression ratio in an internal combustion engine?

Back

It affects the engine's efficiency and power output.

Front

How does an internal combustion engine convert thermal energy into mechanical energy?

Back

By using the expanding gases from combustion to push the pistons.

Front

What is the purpose of the cooling system in an internal combustion engine?

Back

To maintain optimal operating temperature and prevent overheating.

Front

What are exhaust gases, and why are they important in the context of internal combustion engines?

Back

Exhaust gases are the byproducts of combustion that must be expelled from the engine; they can contain pollutants.