A boiler with a water capacity of 10 tons, generates steam at the rate of 30 tons per hour. If the feed water quality is 0.5 ppm, the concentration of solids will increase 1.5 ppm every hour. What would be the increase in the concentration of solids within 24 hours?

Correct Answer: Option C — 36 ppm

Boiler water dissolved solids concentration rate is determined by the solids added via feedwater versus blowdown rates. Given an increase of 1.5 ppm per hour, multiplying by 24 hours yields a total concentration increase of 36 ppm, accurately tracking boiler water purity per 46 CFR Subchapter F standards.