🔍 Key Concepts

• Foot valve location in a pumping system (where is it installed?) • Difference between priming a pump and protecting against water hammer • How a check valve works to prevent reverse flow

💭 Think About

• Think about what happens to the liquid in a vertical suction line when the pump stops if there is no special valve at the bottom. • Which option describes something that happens before starting the pump rather than while it is already running? • Which function sounds most like a job for a check valve placed at the end of a suction pipe in a tank or bilge?

✅ Before You Answer

• Identify where a foot valve is usually installed (suction side? discharge side? on the shaft?). • Decide which choice is about keeping liquid in the suction line versus protecting equipment from pressure surges. • Eliminate any options that mainly describe protection during running conditions instead of helping the pump be ready to start.