Texas
Wastewater
Class A Study
Guide
(Questions with
Answers)
, 1. Seeding of BOD samples is necessary when samples:
Answer: All of the above (chlorine residual, previously chlorinated, high temperature
exposure, extreme pH industrial wastes)
2. When is blue-green algae most dominant in a pond treatment system?
Answer: Summer
3. A 30-inch interceptor flowing half full at ~2 fps has approximately what flow?
Answer: 2,200 gallons per minute
4. A reciprocating sludge pump calculation shows pumping 5,000 gallons will require
about:
Answer: 60 minutes
5. If a centrifugal pump speed increases by 25%, horsepower required increases by:
Answer: 95 percent
6. When must TCEQ be notified about expansions of a treatment facility?
Answer: Before construction
7. Anaerobic digester gas composition should be approximately:
Answer: 70% methane and 30% carbon dioxide
8. Minimum operating temperature of an anaerobic digester:
Answer: 95°F
9. What wastewater process operates in the endogenous growth phase?
Answer: Extended aeration
10. Why is recirculation needed in a trickling filter?
Answer: All of the above (keep media wet, reduce BOD, control ponding/filter flies)
Wastewater
Class A Study
Guide
(Questions with
Answers)
, 1. Seeding of BOD samples is necessary when samples:
Answer: All of the above (chlorine residual, previously chlorinated, high temperature
exposure, extreme pH industrial wastes)
2. When is blue-green algae most dominant in a pond treatment system?
Answer: Summer
3. A 30-inch interceptor flowing half full at ~2 fps has approximately what flow?
Answer: 2,200 gallons per minute
4. A reciprocating sludge pump calculation shows pumping 5,000 gallons will require
about:
Answer: 60 minutes
5. If a centrifugal pump speed increases by 25%, horsepower required increases by:
Answer: 95 percent
6. When must TCEQ be notified about expansions of a treatment facility?
Answer: Before construction
7. Anaerobic digester gas composition should be approximately:
Answer: 70% methane and 30% carbon dioxide
8. Minimum operating temperature of an anaerobic digester:
Answer: 95°F
9. What wastewater process operates in the endogenous growth phase?
Answer: Extended aeration
10. Why is recirculation needed in a trickling filter?
Answer: All of the above (keep media wet, reduce BOD, control ponding/filter flies)
