Cấp nước & Phân phốiCâu 16 / 360
What is the fundamental purpose of cross-connection control in a potable water system?
a.To increase available flow at fixtures
b.To reduce pipe friction losses
c.To lower the water heater temperature
d.To prevent contaminants or pollutants from entering the potable water supply through backflow
Giải thích
Cross-connection control exists to prevent backflow of contaminants or pollutants into the potable supply. Increasing flow, reducing friction, and lowering heater temperature are unrelated to the protective intent of these provisions.
Trích dẫn luật: 2022 California Plumbing Code (CPC) §603.0Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which of the following is an approved standard material for potable cold and hot water distribution piping inside a building?
- A double check valve assembly (DC) is being selected for a cross-connection. Which application is appropriate for a DC assembly?
- A branch serves fixtures totaling 8 WSFU. Design velocity should be kept at or below about 8 feet per second to limit erosion and noise. If a given pipe size carries the demand at 6 fps, and the next size down would run at 11 fps, which is the better selection and why?
- When sizing water piping using the fixture unit method, why is the total demand in gpm always less than the simple sum of every fixture's peak flow?
- A flushometer (flush valve) water closet is being served. Compared with a flush-tank water closet, what does the flushometer require from the water distribution design?
- A water service run has a developed length of 120 feet with an available pressure of 60 psi and a required residual of 15 psi at the highest fixture, which is 25 feet above the meter. Roughly how much pressure remains for friction loss in the piping (ignoring meter and fitting losses)?
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