wastewater practice exam Questions And Answers

wastewater practice exam Questions And Answers Odors occur when treatment becomes - ANS Anaerobic What should an operator do before entering a manhole - ANS Test for all hazardous gasses and oxygen levels and ventilate the manhole before entering What treatment devices is commonly used to separate and remove large solids from raw wastewater - ANS a mechanically raked bar screen What diseases are caused by pathogenic organisms that may be present in raw wastewater? - ANS Hepatitis, typhoid, paratyphoid, dysentery, and cholera What is typically used to dewater sludge? - ANS Belt press, Drying beds, solid bowl centrifuge, and gravity thickener Calculated the volume in gallons of a rectangular aeration tank that is 60 feet long, 30 feet wide and 20 feet deep - ANS 269,280 What is typically used whenever wastewater cannot flow to the treatment plant by gravity - ANS Lift station A centrifugal pump must be ? or it will not pump - ANS Primed One common type of weir design for measuring flow is - ANS V-Knotch The operator would need to increase or decrease if the ? loading on the plant is high - ANS increase/Organic A simple method for indication when to waste sludge is - ANS Total sedimentation test