WASTEWATER GRADE 1C EXAM 2024 –updated VERSION with CORRECT ANSWERS
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Course
WASTEWATER GRADE 1C
Institution
WASTEWATER GRADE 1C
WASTEWATER GRADE 1C EXAM
2024 –updated VERSION with
CORRECT ANSWERS
What is the solids treatment method that chemically treats the residual flow, then spread
evenly over a porous belt? - CORRECT ANSWERsolids concentration
Wastewater Solids Processing:
The solids treatment method usually de...
WASTEWATER GRADE 1C EXAM
2024 –updated VERSION with
CORRECT ANSWERS
What is the solids treatment method that chemically treats the residual flow, then spread
evenly over a porous belt? - CORRECT ANSWERsolids concentration
Wastewater Solids Processing:
The solids treatment method usually dewaters solids by mixing them with a bulking
agent and then waiting for biological stabilization to occur? - CORRECT
ANSWERcomposting
Wastewater Solids Processing:
The solids treatment method that usually dewaters solids by mixing them with a bulking
agent, and then waiting for biological stabilization to occur is called________ -
CORRECT ANSWERlime stabilization
Wastewater Solids Processing:
What is the name of the solids treatment method that maintains a certain pH for at least
2 hrs, then with the final product which can then be applied directly to land is
called______ - CORRECT ANSWERthermal treatment
Wastewater Solids Processing:
What is the solids treatment method that uses a chemicals and mixes the recycled flow
with the process residual flow in a reactor? - CORRECT ANSWERchlorine oxidation
Wastewater Solids Processing:
What solid treatment method first uses chemicals as it conditions the solids and then
later in the process, "throws" the solids out of the way is called_______ - CORRECT
ANSWERcentrifuge
Wastewater Solids Processing:
,This solids treatment method maximizes the reduction of moisture and solids is
called_______ - CORRECT ANSWERincineration
Wastewater Solids Processing:
What solids treatment method removes 100% of the pathogens, water, and organics
(UV is not the answer) - CORRECT ANSWERincineration
Residual Solids Management:
In general, secondary sludges:
General Wastewater Treatment:
What is the pressure head caused by? - CORRECT ANSWERWater elevation
General Wastewater Treatment:
What color should the piping be that contains reclaimed water? - CORRECT
ANSWERpurple
General Wastewater Treatment:
What is the term for the height to which a column of water will rise in a well. -
CORRECT ANSWERpiezometric surface
General Wastewater Treatment:
In general, what is the maximum practical lift of pumps - CORRECT ANSWER15-25ft
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 - CORRECT ANSWERglobe
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 - CORRECT ANSWERtransducer
Wastewater Treatment Facilities:
The velocity in sanitary sewers is approximately: - CORRECT ANSWER2 ft/s
Wastewater Treatment Facilities:
The distance between manholes ranges from - CORRECT ANSWER300-500ft
Wastewater Treatment Facilities:
What should the flow velocity be through a grit channel - CORRECT ANSWER1.0 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 - CORRECT ANSWERremove some of the organic matter
Wastewater Treatment Facilities:
The most common flow-measure device for wastewater is a_____ - CORRECT
ANSWERparshall flume
Wastewater Treatment Facilities:
The detention time for primary clarifiers usually has a range of_____hr/s - CORRECT
ANSWER1.5-2hr
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 - CORRECT ANSWERactivated sludge
Wastewater Treatment Facilities:
Aerobic ponds usually range in depth from ___-____ft - CORRECT ANSWER3-6ft
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