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Environmental Engineering Practice Test: Wastewater
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Wastewater has several characteristics, including: Physical: Temperature, solids, color, and turbidity Chemical: pH value, dissolved oxygen concentrations, biochemical oxygen demand (BOD), chemical oxygen demand (COD), nitrogen, phosphorus, and chlorine Biological: Determined with bioassays and aquatic toxicology tests  Some other characteristics of wastewater are: Odor: Wastewater that includes sewage typically develops a strong odor. Fresh domestic sewage is almost odorless. Temperature: Due to more biological activity, wastewater will have a higher temperature. The temperature of... Show more
Environmental Engineering Practice Test: Wastewater
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25 Questions

1. The biochemical oxygen demand is computed by __________
2. Which of the following instrument is used to measure turbidity?
3. What is the value of BOD of industrial sewage in kg/day, given population equivalent as 6000 persons?
4. _____ is the amount of oxygen required to oxidize only organic matter in sewage.
5. What is the minimum quantity of dissolved oxygen that should be present in the treated sewage?
6. ________ is used to find the D.O content of sewage.
7. Partially oxidized sewage contains __________
8. The full form of BOD is __________
9. Calculate the percentage of relative stability, given 5 day incubation period at 370C.
10. Which of the following is formed due to the anaerobic decomposition of carbonaceous organic matter?
11. The expression of relative stability at 20oC is given by ___________
12. Methane is formed due to the reduction of __________
13. The presence of free ammonia in sewage represents ____________
14. In India, the average temperature of sewage is __________
15. The fresh sewage is acidic in nature.
16. Which of the following is formed from the anaerobic oxidation of organic matter?
17. The aerobic decomposition of nitrogenous organic matter gives __________
18. The wastewater from the kitchen is an example of __________
19. When the sewage becomes stronger, the turbidity of wastewater?
20. The decomposition of sewage takes place, causing a pungent smell. Which of the following causes the pungent smell?
21. ______ represents the number of dilutions required to reduce odor.
22. The energy released during the anaerobic oxidation of organic matter is _____ kilo calories.
23. The number of stages required for the completion of aerobic oxidation is __________
24. Which of the following is formed from oxidation of organic matter in the presence of oxygen?
25. _______ indicates the freshness of sewage.