What is the second step of the filtering process?

• A. Filter element
• B. Water drain valve
• C. Filter canister
• D. Air eliminator

Answer: (C)

In fuel filtration, the sequence centers on the components that actually perform and house the cleaning action. The filtering element is the part that removes particulates from the fuel. It does this by providing the media that traps dirt as the fuel passes through. The filter canister is the housing that holds that element in place, directs the flow, and contains the cleaned fuel as it continues on. So after the fuel goes through the filtering media, it enters the canister so the next stage of containment and flow control completes the filtration path. The water drain valve and the air eliminator serve auxiliary roles (removing water and venting air) rather than forming the core filtration steps, which is why they aren’t the second step in the filtering sequence.