Odors occur when treatment becomes - ANSWER Anaerobic
What should an operator do before entering a manhole - ANSWER 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 - ANSWER a mechanically raked bar screen
What diseases are caused by pathogenic organisms that may be present in raw wastewater?
- ANSWER Hepatitis, typhoid, paratyphoid, dysentery, and cholera
What is typically used to dewater sludge? - ANSWER 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 - ANSWER 269,280
What is typically used whenever wastewater cannot flow to the treatment plant by gravity -
ANSWER Lift station
A centrifugal pump must be ? or it will not pump - ANSWER Primed
One common type of weir design for measuring flow is - ANSWER V-Knotch
The operator would need to increase or decrease if the ? loading on the plant is high - AN-
SWER increase/Organic
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What should an operator do before entering a manhole - ANSWER 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 - ANSWER a mechanically raked bar screen
What diseases are caused by pathogenic organisms that may be present in raw wastewater?
- ANSWER Hepatitis, typhoid, paratyphoid, dysentery, and cholera
What is typically used to dewater sludge? - ANSWER 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 - ANSWER 269,280
What is typically used whenever wastewater cannot flow to the treatment plant by gravity -
ANSWER Lift station
A centrifugal pump must be ? or it will not pump - ANSWER Primed
One common type of weir design for measuring flow is - ANSWER V-Knotch
The operator would need to increase or decrease if the ? loading on the plant is high - AN-
SWER increase/Organic
1
