What is the function of the exhaust manifold?

• A. To collect products of combustion from each cylinder and discharge them into the air stream.
• B. To duct fuel-air mixture from the carburetor, divide it, and deliver to cylinders.
• C. To filter exhaust gases before they exit.
• D. To regulate engine timing.

Answer: (A)

Exhaust management centers on moving the spent gases out of the engine. The exhaust manifold collects the combustion products from each cylinder and channels them into the rest of the exhaust system, ending up in the exhaust pipe and tail section for discharge into the air. This function is distinct from routing the air–fuel mixture to the cylinders (that’s the job of the intake manifold), filtering exhaust gases (filters or aftertreatment occur later in the exhaust path, not in the manifold itself), or regulating engine timing (that’s handled by the ignition and valve mechanisms). The manifold’s design supports a smooth flow of hot gases and helps manage backpressure so the engine can expel exhaust efficiently.