Filtration and Circulation Systems Questions and Answers Flashcards
6 cards from real CPO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Filtration and Circulation Systems Questions and Answers flashcards as text
What is the purpose of a strainer basket on a pool pump?
Answer: To trap large debris before it reaches the pump impeller and filter
The strainer basket traps leaves, hair, and other large debris to prevent damage to the pump impeller and reduce the load on the main filter.
What is the maximum velocity allowed through pool suction piping?
Answer: 6 feet per second
Industry standards limit suction piping velocity to 6 feet per second to minimize friction losses and the risk of cavitation and entrapment.
How does a variable frequency drive improve pool pump energy efficiency?
Answer: By allowing the pump motor speed to be reduced during low-demand periods
VFDs adjust pump motor speed to match actual demand. Reducing speed by 50 percent reduces energy consumption by approximately 87.5 percent due to the cubic relationship.
What indicates that air is entering the suction side of a pool circulation system?
Answer: Bubbles visible in the pump strainer basket and air bubbles at return inlets
Air infiltration on the suction side manifests as visible air bubbles in the clear pump lid, reduced flow rate, and air bubbles discharged from return inlets.
What is the purpose of a surge tank in a commercial pool system?
Answer: To accommodate water displacement when bathers enter the pool
Surge tanks collect water displaced when bathers enter the pool, preventing overflow and maintaining proper water level at the skimmers.
When should multiport valve positions on a sand filter be changed?
Answer: Only after turning off the pump completely
The multiport valve must only be repositioned when the pump is completely off to prevent internal damage to the valve gasket.