General Wastewater Treatment:
What is the pressure head caused by? - ANSWER Water elevation
General Wastewater Treatment:
What color should the piping be that contains reclaimed water? - ANSWER purple
General Wastewater Treatment:
What is the term for the height to which a column of water will rise in a well. - ANSWER
piezometric surface
General Wastewater Treatment:
In general, what is the maximum practical lift of pumps - ANSWER 15-25ft
General Wastewater Treatment:
Which one of the following valves is the best to use in throttling a flow situation?
a. gate
b. butterfly
c. globe
1
,d. ball - ANSWER globe
General Wastewater Treatment:
Which one of the following devices is used to measure water depths in storage facilities?
a. transducer
b. Venturi meter
c. magnetic sensor
d. thermistor - ANSWER transducer
Wastewater Treatment Facilities:
The velocity in sanitary sewers is approximately: - ANSWER 2 ft/s
Wastewater Treatment Facilities:
The distance between manholes ranges from - ANSWER 300-500ft
Wastewater Treatment Facilities:
What should the flow velocity be through a grit channel - ANSWER 1.0 ft/s
Wastewater Treatment Facilities:
Grit washers are used to______
2
,a. remove some of the organic matter
b. remove large pieces of wood
c. remove rags and eggshells
d. remove the odors - ANSWER remove some of the organic matter
Wastewater Treatment Facilities:
The most common flow-measure device for wastewater is a_____ - ANSWER parshall
flume
Wastewater Treatment Facilities:
The detention time for primary clarifiers usually has a range of_____hr/s - ANSWER 1.5-
2hr
Wastewater Treatment Facilities:
The effluent from which process is called mixed liquor
a.secondary clarification
b. primary clarification
c. sludge drying bed or pond
d. activated sludge - ANSWER activated sludge
Wastewater Treatment Facilities:
Aerobic ponds usually range in depth from ___-____ft - ANSWER 3-6ft
3
, Wastewater Treatment Facilities:
Anaerobic ponds usually range in depth from___-___ft - ANSWER 8-12ft
Wastewater Treatment Facilities:
Another name for a waste stabilization pond is - ANSWER raw wastewater lagoon
Wastewater sources & characteristics:
Typically what average percent of total solids in a domestic wastewater, both dissolved and
suspended, are inorganics - ANSWER 50%
Wastewater sources & characteristics:
Typically, what average percent of total solids in domestic wastewater, both dissolved and
suspended, are inorganics? - ANSWER 50%
Wastewater sources & characteristics:
Approx. what % of the dissolved solids in wastewater are inorganics - ANSWER 87%
Wastewater sources & characteristics:
Approximately what % of the dissolved solids in wastewater are organics - ANSWER 12%
Wastewater sources & characteristics:
4
What is the pressure head caused by? - ANSWER Water elevation
General Wastewater Treatment:
What color should the piping be that contains reclaimed water? - ANSWER purple
General Wastewater Treatment:
What is the term for the height to which a column of water will rise in a well. - ANSWER
piezometric surface
General Wastewater Treatment:
In general, what is the maximum practical lift of pumps - ANSWER 15-25ft
General Wastewater Treatment:
Which one of the following valves is the best to use in throttling a flow situation?
a. gate
b. butterfly
c. globe
1
,d. ball - ANSWER globe
General Wastewater Treatment:
Which one of the following devices is used to measure water depths in storage facilities?
a. transducer
b. Venturi meter
c. magnetic sensor
d. thermistor - ANSWER transducer
Wastewater Treatment Facilities:
The velocity in sanitary sewers is approximately: - ANSWER 2 ft/s
Wastewater Treatment Facilities:
The distance between manholes ranges from - ANSWER 300-500ft
Wastewater Treatment Facilities:
What should the flow velocity be through a grit channel - ANSWER 1.0 ft/s
Wastewater Treatment Facilities:
Grit washers are used to______
2
,a. remove some of the organic matter
b. remove large pieces of wood
c. remove rags and eggshells
d. remove the odors - ANSWER remove some of the organic matter
Wastewater Treatment Facilities:
The most common flow-measure device for wastewater is a_____ - ANSWER parshall
flume
Wastewater Treatment Facilities:
The detention time for primary clarifiers usually has a range of_____hr/s - ANSWER 1.5-
2hr
Wastewater Treatment Facilities:
The effluent from which process is called mixed liquor
a.secondary clarification
b. primary clarification
c. sludge drying bed or pond
d. activated sludge - ANSWER activated sludge
Wastewater Treatment Facilities:
Aerobic ponds usually range in depth from ___-____ft - ANSWER 3-6ft
3
, Wastewater Treatment Facilities:
Anaerobic ponds usually range in depth from___-___ft - ANSWER 8-12ft
Wastewater Treatment Facilities:
Another name for a waste stabilization pond is - ANSWER raw wastewater lagoon
Wastewater sources & characteristics:
Typically what average percent of total solids in a domestic wastewater, both dissolved and
suspended, are inorganics - ANSWER 50%
Wastewater sources & characteristics:
Typically, what average percent of total solids in domestic wastewater, both dissolved and
suspended, are inorganics? - ANSWER 50%
Wastewater sources & characteristics:
Approx. what % of the dissolved solids in wastewater are inorganics - ANSWER 87%
Wastewater sources & characteristics:
Approximately what % of the dissolved solids in wastewater are organics - ANSWER 12%
Wastewater sources & characteristics:
4
