Water Supply & Distribution第 45 / 120 题
An atmospheric vacuum breaker serves a fixture whose flood level rim is 34 in above the finished floor. What is the minimum height above the floor at which the vacuum breaker may be installed?
a.34 in
b.40 in
c.46 in
d.37 in
解析
An atmospheric vacuum breaker must be at least 6 in above the flood level rim, so 34 + 6 = 40 in above the floor. Installing it at 34 in puts it level with the rim with no clearance at all. The 37 in answer uses a 3 in clearance and 46 in uses the 12 in clearance required for a pressure vacuum breaker above its highest outlet.
法律依据: IPC §608.13免费刷完整 120 道题库 — 无需注册。
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