Design & SizingCâu 8 / 110
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.18 DFU
b.28 DFU
c.32 DFU
d.24 DFU
Giải thích
Total = (4 x 4) + (4 x 1) + (2 x 2) = 16 + 4 + 4 = 24 DFU. This total is read against the horizontal fixture branch column of the drain sizing table to select the pipe. Because water closets are present, the branch can be no smaller than 3 in regardless of the DFU count.
Trích dẫn luật: UPC §703.0Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A system has 62 psi at the meter. It must overcome 22 psi of elevation, 14 psi of friction loss in the piping, and deliver a fixture that requires 8 psi minimum flow pressure. What residual pressure remains at the fixture?
- A copper water line has 90 ft of straight pipe. Fittings add an equivalent length of 3 ft each for four elbows and 8 ft for one gate valve. What is the developed (equivalent) length used for friction-loss calculations?
- Available pressure for friction is 30 psi and the total developed length of the water line is 150 ft. What is the maximum allowable uniform friction loss per 100 ft of pipe (the value used to enter a sizing chart)?
- 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 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?
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