Systems & Code第 45 / 110 题
A water softener regenerates using 8 lb of salt per cubic foot of resin for a 3 cubic foot resin bed. How much salt is consumed per regeneration cycle?
a.24 lb
b.8 lb
c.16 lb
d.32 lb
解析
Salt per regeneration = dosage x resin volume = 8 lb/ft^3 x 3 ft^3 = 24 lb. The salt dose sets both the operating cost and the chloride load in the brine discharge, which must terminate through an air gap to a receptor. Higher salt doses increase capacity but also increase brine strength.
法律依据: UPC §611.0免费刷完整 110 道题库 — 无需注册。
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