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...
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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