CPO Pool Equipment and Mechanical 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 CPO Pool Equipment and Mechanical Systems Questions and Answers flashcards as text
What is the primary purpose of a pool pump's strainer basket?
Answer: To collect debris before water enters the pump impeller
The strainer basket catches leaves, hair, and other debris before they can reach and damage the pump impeller.
What does TDH stand for in pool pump hydraulics?
Answer: Total Dynamic Head
Total Dynamic Head (TDH) is the total resistance a pump must overcome, combining suction and discharge head losses.
At what pressure rise above the clean starting pressure should a sand filter typically be backwashed?
Answer: 8–10 PSI
A sand filter should be backwashed when pressure rises 8–10 PSI above its clean operating pressure, indicating the filter media is clogged.
What type of motor is most commonly used in modern variable-speed pool pumps?
Answer: Permanent magnet motor
Permanent magnet motors are used in variable-speed pumps because they are highly efficient across a wide range of speeds.
What is the purpose of a check valve in pool plumbing?
Answer: To prevent backflow of water
A check valve allows water to flow in only one direction, preventing backflow that could contaminate chemical feeders or damage equipment.
What is cavitation in a pool pump?
Answer: The formation and collapse of vapor bubbles due to low suction pressure
Cavitation occurs when the pump's inlet pressure drops too low, causing water to vaporize and create bubbles that implode and damage internal components.