TX Class C Wastewater Treatment
License
Question 1: What is the % reduction formula?
● A) outgoing/incoming X 100
● B) incoming - outgoing/incoming X 100
● C) incoming + outgoing/incoming X 100
● D) incoming X outgoing/100
Answer: B) incoming - outgoing/incoming X 100
Question 2: 1 acre equals:
● A) 40,000 ft squared
● B) 43,560 ft squared
● C) 50,000 ft squared
● D) 45,000 ft squared
Answer: B) 43,560 ft squared
Question 3: 1 acre will treat approximately how many pounds of BOD?
● A) 25 lb
● B) 30 lb
● C) 35 lb
● D) 40 lb
Answer: C) 35 lb
Question 4: 1 day equals how many minutes?
● A) 1200 minutes
● B) 1440 minutes
● C) 1600 minutes
● D) 1800 minutes
Answer: B) 1440 minutes
,Question 5: 1 gallon of water weighs:
● A) 7.48 pounds
● B) 8.00 pounds
● C) 8.34 pounds
● D) 9.00 pounds
Answer: C) 8.34 pounds
Question 6: 1 Liter equals:
● A) 500 milliliters (mL)
● B) 750 milliliters (mL)
● C) 1000 milliliters (mL)
● D) 1250 milliliters (mL)
Answer: C) 1000 milliliters (mL)
Question 7: 1 mg/L equals:
● A) 1 parts per billion (ppb) in water
● B) 1 parts per million (ppm) in water
● C) 1 parts per thousand (ppt) in water
● D) 10 parts per million (ppm) in water
Answer: B) 1 parts per million (ppm) in water
Question 8: 1 MGAD equals:
● A) 20 gpd/ft cubed
● B) 23 gpd/ft cubed
● C) 25 gpd/ft cubed
● D) 27 gpd/ft cubed
Answer: B) 23 gpd/ft cubed
Question 9: 1 mL of water weighs:
, ● A) 1 milligram (mg)
● B) 1 gram (g)
● C) 1 kilogram (kg)
● D) 10 grams (g)
Answer: B) 1 gram (g)
Question 10: 1,000,000 gallons per day equals:
● A) 1 GPD
● B) 1 KGD
● C) 1 MGD
● D) 1 BGD
Answer: C) 1 MGD
Question 11: 27 ft cubed equals:
● A) 1 foot cubed
● B) 1 yard cubed
● C) 1 meter cubed
● D) 1 acre cubed
Answer: B) 1 yard cubed
Question 12: 43,560 ft cubed equals:
● A) 1 acre-ft
● B) 1 yard-ft
● C) 1 mile-ft
● D) 1 hectare-ft
Answer: A) 1 acre-ft
Question 13: 7.48 gallons equals:
● A) 1 yard cubed
● B) 1 meter cubed
● C) 1 ft cubed
● D) 1 liter
, Answer: C) 1 ft cubed
Question 14: 8.34 lb in 1 MG of water equals:
● A) 1 ppb (parts per billion)
● B) 1 ppm (parts per million)
● C) 1 ppt (parts per thousand)
● D) 10 ppm (parts per million)
Answer: B) 1 ppm (8.34 lb/8,340,000)
Question 15: A BOD test is:
● A) a minor parameter in quality control
● B) only used for drinking water
● C) a major parameter in quality control
● D) not important in wastewater treatment
Answer: C) a major parameter in quality control
Question 16: A buildup of solids in the tank of the rotating biological contactor
may be caused by:
● A) excessive aeration
● B) poor primary clarification
● C) high temperature
● D) low pH only
Answer: B) poor primary clarification
Question 17: A cause of poor quality supernatant liquor could be:
● A) digester underload
● B) digester overload
● C) excessive mixing
● D) low temperature only
Answer: B) digester overload
License
Question 1: What is the % reduction formula?
● A) outgoing/incoming X 100
● B) incoming - outgoing/incoming X 100
● C) incoming + outgoing/incoming X 100
● D) incoming X outgoing/100
Answer: B) incoming - outgoing/incoming X 100
Question 2: 1 acre equals:
● A) 40,000 ft squared
● B) 43,560 ft squared
● C) 50,000 ft squared
● D) 45,000 ft squared
Answer: B) 43,560 ft squared
Question 3: 1 acre will treat approximately how many pounds of BOD?
● A) 25 lb
● B) 30 lb
● C) 35 lb
● D) 40 lb
Answer: C) 35 lb
Question 4: 1 day equals how many minutes?
● A) 1200 minutes
● B) 1440 minutes
● C) 1600 minutes
● D) 1800 minutes
Answer: B) 1440 minutes
,Question 5: 1 gallon of water weighs:
● A) 7.48 pounds
● B) 8.00 pounds
● C) 8.34 pounds
● D) 9.00 pounds
Answer: C) 8.34 pounds
Question 6: 1 Liter equals:
● A) 500 milliliters (mL)
● B) 750 milliliters (mL)
● C) 1000 milliliters (mL)
● D) 1250 milliliters (mL)
Answer: C) 1000 milliliters (mL)
Question 7: 1 mg/L equals:
● A) 1 parts per billion (ppb) in water
● B) 1 parts per million (ppm) in water
● C) 1 parts per thousand (ppt) in water
● D) 10 parts per million (ppm) in water
Answer: B) 1 parts per million (ppm) in water
Question 8: 1 MGAD equals:
● A) 20 gpd/ft cubed
● B) 23 gpd/ft cubed
● C) 25 gpd/ft cubed
● D) 27 gpd/ft cubed
Answer: B) 23 gpd/ft cubed
Question 9: 1 mL of water weighs:
, ● A) 1 milligram (mg)
● B) 1 gram (g)
● C) 1 kilogram (kg)
● D) 10 grams (g)
Answer: B) 1 gram (g)
Question 10: 1,000,000 gallons per day equals:
● A) 1 GPD
● B) 1 KGD
● C) 1 MGD
● D) 1 BGD
Answer: C) 1 MGD
Question 11: 27 ft cubed equals:
● A) 1 foot cubed
● B) 1 yard cubed
● C) 1 meter cubed
● D) 1 acre cubed
Answer: B) 1 yard cubed
Question 12: 43,560 ft cubed equals:
● A) 1 acre-ft
● B) 1 yard-ft
● C) 1 mile-ft
● D) 1 hectare-ft
Answer: A) 1 acre-ft
Question 13: 7.48 gallons equals:
● A) 1 yard cubed
● B) 1 meter cubed
● C) 1 ft cubed
● D) 1 liter
, Answer: C) 1 ft cubed
Question 14: 8.34 lb in 1 MG of water equals:
● A) 1 ppb (parts per billion)
● B) 1 ppm (parts per million)
● C) 1 ppt (parts per thousand)
● D) 10 ppm (parts per million)
Answer: B) 1 ppm (8.34 lb/8,340,000)
Question 15: A BOD test is:
● A) a minor parameter in quality control
● B) only used for drinking water
● C) a major parameter in quality control
● D) not important in wastewater treatment
Answer: C) a major parameter in quality control
Question 16: A buildup of solids in the tank of the rotating biological contactor
may be caused by:
● A) excessive aeration
● B) poor primary clarification
● C) high temperature
● D) low pH only
Answer: B) poor primary clarification
Question 17: A cause of poor quality supernatant liquor could be:
● A) digester underload
● B) digester overload
● C) excessive mixing
● D) low temperature only
Answer: B) digester overload
