Hydraulics and Plumbing Systems Flashcards
7 cards from real CAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Hydraulics and Plumbing Systems flashcards as text
What is the primary function of the hair and lint strainer (pump basket) in a pool plumbing system?
Answer: To protect the pump impeller from debris that could cause damage
The hair and lint strainer captures large debris such as hair, leaves, and lint before they reach the pump impeller, preventing damage and blockages.
Which type of fitting is used to make a 90-degree change in pipe direction in pool plumbing?
Answer: Elbow
An elbow fitting allows water flow to change direction at a 90-degree (or 45-degree) angle within a plumbing system.
What is the main advantage of using a union fitting in pool equipment plumbing?
Answer: It allows disconnection of components for maintenance without cutting pipe
A union fitting allows technicians to disconnect and reconnect plumbing components for maintenance or replacement without cutting or damaging the pipe.
What is the function of a vacuum breaker installed in a pool plumbing system?
Answer: To prevent siphoning and backflow by admitting air when negative pressure occurs
A vacuum breaker admits air into the system when pressure drops below atmospheric, preventing siphoning and backflow that could contaminate potable water supplies.
Which type of valve is preferred as a full-flow shut-off valve in pool plumbing because it provides minimal flow resistance when fully open?
Answer: Ball valve
Ball valves offer full, unrestricted flow when open due to their through-bore design and can be quickly operated with a quarter-turn, making them ideal for pool shut-off applications.
What does a sight glass installed in pool piping allow the technician to observe?
Answer: Flow conditions and the presence of air bubbles in the system
A sight glass is a transparent section of pipe or fitting that allows visual inspection of water flow and detection of air bubbles in the circulation system.
What is the purpose of an air relief valve located at the top of a pool filter tank?
Answer: To release trapped air from the filter, preventing air locks that reduce filtration efficiency
An air relief valve releases air that collects at the top of the filter tank, preventing air locks that would impede water flow and reduce filtration effectiveness.