A、concentrations of calcium sulfate in the boiler water
B、fuel oil in the feed water
C、improper treatment of the feed water with calcium sulfate
D、excessive feed water alkalinity
更多“The most common cause of scale formation in an auxiliary boiler is （）”相关的问题
A、Between；more commonly B、Among；the most commonly C、Between；not more commonly D、Among；not the most commonly
A、more water contents B、contamination with fuel oil C、higher temperature D、sufficient cooling of oil mist
A、air being warmed above the dew point B、saturation of cold air by rain C、a rapid cooling of the air near the surface of the Earth at night D、warm moist air being blown over a colder surface
A、A.air being warmed above the dew point B、B.saturation of cold air by rain C、C.a rapid cooling of the air near the surface of the Earth at night D、D.warm moist air being blown over a colder surface
A、the most common method used in the United States B、too expensive for common use C、generally safe to sea life D、generally harmful to sea life
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