CLASS D WASTEWATER TEST
QUESTIONS AND ANSWERS
A rectangular basin 10 feet deep, 30 feet long and 15 feet wide, contains a volume of
about - Answer-4,500 cubic feet LxWxH
At a constant chlorine dosage of 35 pounds per day, a 150 pound chlorine container
should last about - Answer-4.3 days
At an average flow of 4 million gallons per day, the average detention time of
300,000 gallon aeration basin will be about - Answer-1.8 hours
If the influential flow rate is 1.2 million gallons per day with an average BOD
concentration of 300 mg/L, find the total pound of BOD entering the wastewater
treatment plant daily. - Answer-3000 pounds per day
Monthly repairs of domestic wastewater treatment plant discharges (effluent quantity
and quality are required Texas by the - Answer-Texas Commission On
Environmental Quality (TCEQ)
The aeration basin in an active sludge process should be - Answer-Aerobic
Operator treatment goals are defined by the limits and conditions in waste discharge
- Answer-Permits
According to TCEQ design criteria for domestic wastewater system (30 Texas
administrative code chapter 217) wastewater collection lines should not be installed
any closer than (9) feet from an (blank) line - Answer-Water
Screenings from a treatment plant should be - Answer-Buried in a permitted sanitary
landfill
(Blank) is considered to be preliminary treatment - Answer-Grit removal
Settling of solids occurs more rapidly in - Answer-Warm wastewater
Process control of an activated sludge wastewater treatment plant includes -
Answer-B and C only / Proper sludge wasting and Using information from samples,
test, and records to adjust the treatment process.
Aerobically digested sludge will - Answer-Be a brownish color
A process used to stabilize the bio solids (sludge) removed during wastewater
treatment is known as - Answer-Digestion
Chlorine in the presence of moisture (water) is highly - Answer-Corrosive
QUESTIONS AND ANSWERS
A rectangular basin 10 feet deep, 30 feet long and 15 feet wide, contains a volume of
about - Answer-4,500 cubic feet LxWxH
At a constant chlorine dosage of 35 pounds per day, a 150 pound chlorine container
should last about - Answer-4.3 days
At an average flow of 4 million gallons per day, the average detention time of
300,000 gallon aeration basin will be about - Answer-1.8 hours
If the influential flow rate is 1.2 million gallons per day with an average BOD
concentration of 300 mg/L, find the total pound of BOD entering the wastewater
treatment plant daily. - Answer-3000 pounds per day
Monthly repairs of domestic wastewater treatment plant discharges (effluent quantity
and quality are required Texas by the - Answer-Texas Commission On
Environmental Quality (TCEQ)
The aeration basin in an active sludge process should be - Answer-Aerobic
Operator treatment goals are defined by the limits and conditions in waste discharge
- Answer-Permits
According to TCEQ design criteria for domestic wastewater system (30 Texas
administrative code chapter 217) wastewater collection lines should not be installed
any closer than (9) feet from an (blank) line - Answer-Water
Screenings from a treatment plant should be - Answer-Buried in a permitted sanitary
landfill
(Blank) is considered to be preliminary treatment - Answer-Grit removal
Settling of solids occurs more rapidly in - Answer-Warm wastewater
Process control of an activated sludge wastewater treatment plant includes -
Answer-B and C only / Proper sludge wasting and Using information from samples,
test, and records to adjust the treatment process.
Aerobically digested sludge will - Answer-Be a brownish color
A process used to stabilize the bio solids (sludge) removed during wastewater
treatment is known as - Answer-Digestion
Chlorine in the presence of moisture (water) is highly - Answer-Corrosive
