Wastewater Operator certification Study Guide-
Grade 2 Questions Verified by Expert
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
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______
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
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:
Which organism wold most probably be associated with moderate sludge age and effluent water quality
- Answer free-swimming ciliates
Wastewater sources & characteristics:
Which organism would most probably be associated with high suspended solids and biochemical oxygen
demand (BOD) - Answer amoebas
Wastewater sources & characteristics:
Grade 2 Questions Verified by Expert
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
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______
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
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:
Which organism wold most probably be associated with moderate sludge age and effluent water quality
- Answer free-swimming ciliates
Wastewater sources & characteristics:
Which organism would most probably be associated with high suspended solids and biochemical oxygen
demand (BOD) - Answer amoebas
Wastewater sources & characteristics:
