I hope that you find this quiz to be a helpful study tool for the final exam.
1. . Dissolved Oxygen
is essential for fish is caused by waste discharge is not affected by temperature none of the above
2. Photosynthesis of aquatic plants adds dissolved oxygen to a water body during the day
true false
3. What bacterias are used to identify possible water contamination?
Pathogenic coliforms All bacteria E. Coli none of the above
4. A. Bacterial populations will lose what percentage in 2 days?
10% 20% 50% 90%
5. Which of the following raise DO levels? . Heated water discharge Respiration Reaeration Accidental swewage discharge
6. Combined Sewer Overflows (CSO's):
are designed into new sewage systems. are a problem in rurual areas when it rains a lot. are a problem during dry weather. are a problem in cities with old sewer systems whten it rains a lot.
7. When bacteria decompose waste in water they add pollution they use oxygen they use hydrogen they add hydrogen
8. Decomposition of organic matter adds oxygen from a water body.
9. Downstream of a discharge is called the "recovery zone",
which contains a return of endangered species. which contains a return of wastewater discharges with problematic BOD. which contains a return of more pollution tollerant species. none of the above.
10. Untreated domestic waste has
About 3 million coliform per 100mL (teacup). About 30 million coliform per 100 mL (teacup)/ About 2 million coliform per kilowatt. no coliform.
Your score out of 100%:
Your answers were: (C = Correct, X = Incorrect)