设施、清洁与虫害第 297 / 320 题
A hose is connected to a faucet and left submerged in a mop bucket of dirty water. What hazard does this create?
a.A cross-connection that could allow backflow of contaminated water into the potable supply
b.Nothing, because the water pressure only flows out
c.A minor cosmetic issue with no health impact
d.An improvement to water conservation
解析
A hose submerged in dirty water creates a cross-connection: if pressure drops, back-siphonage can pull the contaminated water into the potable plumbing. This is exactly the scenario backflow prevention devices and air gaps are meant to stop. Hoses should never be left in standing water, and a backflow preventer or air gap should protect the connection.
法律依据: FDA Food Code §5-402.11免费刷完整 320 道题库 — 无需注册。
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