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