Thiết bị & Bình nước nóngCâu 223 / 360
Cross-connection control in a potable water system is intended to:
a.increase water pressure at fixtures
b.prevent nonpotable or contaminated water from entering the potable supply
c.reduce pipe corrosion
d.silence water hammer
Giải thích
Cross-connection control uses air gaps and backflow prevention devices to keep contaminated or nonpotable water from flowing back into the drinking water system. Backflow can occur by back-siphonage or back-pressure. Protecting every actual or potential cross-connection is a core plumbing safety requirement.
Trích dẫn luật: 2022 California Plumbing Code (CPC) §603.2Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Water hammer arrestors are installed on a water distribution system primarily to:
- An outdoor hose bibb (sillcock) must be protected against backflow by:
- Each fixture supply to a lavatory or water closet is commonly fitted with an angle stop primarily to:
- A water heater installed in an attic must be reached by a passageway and working platform. A typical minimum requirement is a solid, continuous passageway not less than:
- A floor drain located in a room that is used infrequently may lose its trap seal by evaporation. The approved way to keep the seal is to provide:
- A plumber replaces a water heater in a finished basement over a slab where a leak would not damage anything below, but the local code still requires spill protection. If a drain pan is installed, its drain must:
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-36 Plumbing Trade Examination · Quy trình kiểm tra