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wastewater practice exam

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Wastewater Practice Exam 2023 Odors occur when treatment becomes Ans- Anaerobic What should an operator do before entering a manhole Ans- Test for all hazardous gases and oxygen levels and ventilate the manhole before entering What treatment devices is commonly used to separate and remove larg...

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  • March 21, 2023
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Wastewater Practice Exam 2023
Odors occur when treatment becomes Ans- Anaerobic



What should an operator do before entering a manhole Ans- Test for all hazardous gases 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

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