Design & SizingCâu 11 / 110
A 2 in horizontal fixture drain must fall a total of 5 in over its run at the code minimum slope of 1/4 in per foot. How long is the run?
a.24 ft
b.40 ft
c.20 ft
d.60 ft
Giải thích
Length = fall / slope = 5 in / (1/4 in per ft) = 5 x 4 = 20 ft. Pipe 2-1/2 in and smaller uses the steeper 1/4 in per foot minimum. Dividing by 1/8 in per ft would incorrectly give 40 ft, the rate reserved for 3 in and larger pipe.
Trích dẫn luật: IPC §704.1Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A horizontal drainage branch carries the following drainage fixture units (DFU): 4 water closets at 4 DFU, 4 lavatories at 1 DFU, and 2 kitchen sinks at 2 DFU. What is the total DFU load carried by the branch?
- A horizontal fixture branch carries 30 DFU. The sizing table lists these branch capacities: 2 in = 6 DFU, 3 in = 20 DFU, 4 in = 160 DFU. Two of the fixtures are water closets. What is the minimum pipe size for the branch?
- A 4 in building drain is run at the code minimum slope of 1/8 in per foot over a developed length of 96 ft. What is the total fall from the upstream end to the downstream end?
- A vent must be sized at not less than one-half the diameter of the drain it serves, and never smaller than 1-1/4 in. What is the minimum vent size for a 3 in drain?
- A 2 in trap arm connects a fixture trap to its vent. The code limits the fall in a trap arm to no more than one pipe diameter between the trap weir and the vent. What is the maximum allowable fall in this trap arm?
- A natural-gas furnace is rated at 120,000 BTU/hr. Natural gas has a heating value of about 1,000 BTU per cubic foot. What gas volume flow, in cubic feet per hour (cfh), must the piping deliver?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với Master Plumber Licensing Exam (UPC/IPC-based) · Quy trình kiểm tra