Oit Sample Test Study Guide Graded A+

primary moving component of a centrifugal pump {Ans: impeller}when flushing a watermain, operators should ensure that the pressure in nearby areas does not drop below ... {Ans: 350 kPa}what is a "crown" {Ans: the inside top of a sewage pipe}chemical feeder will feed at max rate of 900 kg per day what is it in kg/min {Ans: 0.63}what causes hardness in water {Ans: dissolved mineral salts}why is turbidity controlled {Ans: to remove particles which can shield microorganisms}