A combination of components used to supply fresh clean air to the cylinder where it is combined with fuel to form the fuel-air mixture.

• A. Air intake system
• B. Exhaust system
• C. Lubrication system
• D. Cooling system

Answer: (A)

Delivering fresh, clean air to the cylinder is the job of the air intake system. It starts with an air filter that traps dust and particles, then uses intake ducts and a throttle body or carburetor to regulate how much air enters. The air is then routed through an intake manifold to be distributed to each cylinder. Clean air is essential because contaminants can cause wear and affect combustion, while the amount and temperature of the incoming air influence the fuel-air mix and engine efficiency. The other systems do different jobs: the exhaust system removes burnt gases, the lubrication system keeps parts lubricated, and the cooling system removes excess heat. So the components that supply clean air for mixing with fuel are the air intake system.