🔍 Key Concepts

• Self-cleaning centrifugal purifier bowl layout – where sludge exits versus where water enters/drains • Function of operating water: opening water, closing water, and any drains that keep the operating slide moving freely • Physical location of port H in relation to the operating slide (R) and the sludge space (O) in the cross‑section

💭 Think About

• Trace the flow path from the operating water inlets at the top (A, B, C) down to the bottom of the bowl – where would water need to be removed so it does NOT interfere with the movement of the operating slide? • Look at where actual sludge leaves the bowl during a dump – does it pass anywhere near port H, or does it leave through entirely different openings in the bowl periphery? • Ask yourself whether port H appears to supply water into a space, or to drain/relieve water from beneath the moving parts at the bottom of the bowl.

✅ Before You Answer

• Verify whether port H is connected to the sludge space (O) or to a small passage leading away from underneath the operating slide R. • Check if port H is drawn as a small drain passage rather than a large discharge opening for sludge. • Confirm which exam choice describes a function that matches a small drain under the operating slide versus a main operating-water inlet or sludge discharge.