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WASTE WATER GRADE 2 EXAM NEWEST 2025/2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED||
After thickening, solids from the wastewater treatment process
are sent to the digester, which produces:
1. Methane gas
2. Nitrogen gas
3. Urea
4. Ammonia - ANSWER-Methane gas
Methane gas captured during digestion is used to:
1. Spread solids after digestion onto farm field
2. Remove urea from the wastewater
3. Heat the wastewater treatment plant
4. Thicken the solids - ANSWER-Heat the wastewater treatment
plant
What is sludge hauling?
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1. Transferring solids from the secondary clarifier to the gravity
belt thickener
2. When solids produced at the wastewater treatment plant are
sent to farm fields
3. Hauling large solids, like rags and flushable wipes, to a landfill
4. Transferring grease from the primary clarifier to a grease truck
for removal - ANSWER-When solids produced at the wastewater
treatment plant are sent to farm fields
After the final clarifier, wastewater is sent to the contact tanks for:
1. Removal of urea
2. Removal of Ammonia
3. Removal of suspended solids
4. Disinfection with chlorine/bleach - ANSWER-Disinfection with
chlorine/bleach
A goal of coagulation, flocculation, and sedimentation is to
1. Inactivate pathogens
2. Remove bad tastes, odors, and colors
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3. Remove flocculated impurities - ANSWER-Remove bad tastes,
odors, and colors
reduce turbidity
A goal of filtration is to:
1. Remove flocculated impurities
2. Remove bad tastes, odors and colors
3. Inactivate pathogens - ANSWER-Remove flocculated
impurities
The goal of disinfection is to:
1. Remove bad tastes, odors, and colors
2. Remove flocculated impurities
3. Inactivate pathogens - ANSWER-Inactivate pathogens
UV and ozone are considered secondary disinfectants because:
1. They produce a residual disinfectant
2. They are carried through the distribution piping and disinfect
along the way
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3. They are used in corrosion control
4. They do not produce a residual disinfectant - ANSWER-They
do not produce a residual disinfectant
Ammonia reacts with chlorine to form:
1. Corrosion inhibitors
2. Manganese
3. Chloramines
4. Flocs - ANSWER-Chloramines
Chloramines are useful in drinking water treatment because they:
1. Maintain a disinfectant residual through the distribution system
2. Control corrosion of distribution piping
3. React with impurities to form flocs
4. Are easily filtered out during the filtration process - ANSWER-
Maintain a disinfectant residual through the distribution system
The primary chemical contaminant in groundwater in the Eau
Claire well field is:
WASTE WATER GRADE 2 EXAM NEWEST 2025/2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED||
After thickening, solids from the wastewater treatment process
are sent to the digester, which produces:
1. Methane gas
2. Nitrogen gas
3. Urea
4. Ammonia - ANSWER-Methane gas
Methane gas captured during digestion is used to:
1. Spread solids after digestion onto farm field
2. Remove urea from the wastewater
3. Heat the wastewater treatment plant
4. Thicken the solids - ANSWER-Heat the wastewater treatment
plant
What is sludge hauling?
,2|Page
1. Transferring solids from the secondary clarifier to the gravity
belt thickener
2. When solids produced at the wastewater treatment plant are
sent to farm fields
3. Hauling large solids, like rags and flushable wipes, to a landfill
4. Transferring grease from the primary clarifier to a grease truck
for removal - ANSWER-When solids produced at the wastewater
treatment plant are sent to farm fields
After the final clarifier, wastewater is sent to the contact tanks for:
1. Removal of urea
2. Removal of Ammonia
3. Removal of suspended solids
4. Disinfection with chlorine/bleach - ANSWER-Disinfection with
chlorine/bleach
A goal of coagulation, flocculation, and sedimentation is to
1. Inactivate pathogens
2. Remove bad tastes, odors, and colors
,3|Page
3. Remove flocculated impurities - ANSWER-Remove bad tastes,
odors, and colors
reduce turbidity
A goal of filtration is to:
1. Remove flocculated impurities
2. Remove bad tastes, odors and colors
3. Inactivate pathogens - ANSWER-Remove flocculated
impurities
The goal of disinfection is to:
1. Remove bad tastes, odors, and colors
2. Remove flocculated impurities
3. Inactivate pathogens - ANSWER-Inactivate pathogens
UV and ozone are considered secondary disinfectants because:
1. They produce a residual disinfectant
2. They are carried through the distribution piping and disinfect
along the way
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3. They are used in corrosion control
4. They do not produce a residual disinfectant - ANSWER-They
do not produce a residual disinfectant
Ammonia reacts with chlorine to form:
1. Corrosion inhibitors
2. Manganese
3. Chloramines
4. Flocs - ANSWER-Chloramines
Chloramines are useful in drinking water treatment because they:
1. Maintain a disinfectant residual through the distribution system
2. Control corrosion of distribution piping
3. React with impurities to form flocs
4. Are easily filtered out during the filtration process - ANSWER-
Maintain a disinfectant residual through the distribution system
The primary chemical contaminant in groundwater in the Eau
Claire well field is:
