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        True or False?

1. In Minnesota there two types of drinking water standards.
   
   a. True b. False
    

2. Records of action taken to correct violations must be kept for at least 3 years.
   
   a. True b. False
    

3. When natural aeration is used, it should be screened to protect it from insects.
   
   a. True b. False
    

4. When forced air is used, the air outlet and inlet shall be screened.
   
   a. True b. False
    

5. Chlorination equipment shall be capable of keeping free chlorine residual of 2 ppm for at
   least 30 minutes in the finished water at peak flow.
   
   a. True b. False
    

6. Turbidity in drinking water may not exceed 0.5 TU in 95% of samples each month.
   
   a. True b. False
    

7. Switches for the lights and fan of a chemical feed room should be located right inside the door
   on the left hand side.
   
   a. True b. False
    

8. The door on the chlorine room should open outward and be equipped with panic hardware.
   
   a. True b. False
   
   
   Multiple Choice - Select the best answer:
    

9. A person drinking water containing a particular contaminant below this level over his or her
   lifetime should experience no ill effects.
   
   a. Treatment Technique Requirements (TTR) b. Maximum Contaminant Level Goal (MCLG) c. Maximum Contaminant Level (MCL) d. None of the above.
    

10. A person drinking water containing a particular contaminant above this level over their lifetime
    could experience ill effects. This would then be an enforceable standard.
    
    a. Treatment Technique Treatment (TTR) b. Maximum Contaminant Level Goal (MCLG) c. Maximum Contaminant Level (MCL) d. None of the above.
    
    
    In Minnesota who is responsible for:
     

11. Enforcement of the SDWA regulations:
    
    a. EPA b. DNR (Department of Natural Resources) c. MPCA d. MN Department of Health
     

12. The “primacy agency” responsible for drinking water?
    
    a. EPA b. DNR (Department of Natural Resources) c. MPCA d. MN Department of Health
     

13. Conducting sanitary surveys of PWS:
    
    a. EPA b. DNR (Department of Natural Resources) c. MPCA d. MN Department of Health
     

14. Certifying the laboratories conducting analytical measurements
    
    a. EPA b. DNR (Department of Natural Resources) c. MPCA d. MN Department of Health
     

15. Plan review of new or modified PWS facilities:
    
    a. EPA b. DNR (Department of Natural Resources) c. MPCA d. MN Department of Health
     

16. Primary Standards that are based on health are?
    
    a. Enforceable b. Recommended c. Highly appreciated d. none of the above.
     

17. Secondary Standards are based on:
    
    a. Quality b. Flow c. Aesthetics d. Water rates
     

18. A system in Minnesota providing drinking water for consumption is considered a Public
    Water Supply (PWS) if it serves how many service connections for 60 days?
    
    a. 10 b. 15 c. 50 d. 150
     

19. Community PWS is a system which serves ____ service connections or ____ year round residents.
    
    a. 50 service connections, 50 resident b. 15 service connections, 15 residents c. 150 service connections, 150 residents d. 15 service connections, 25 residents
     

20. The Total Coliform Rule for all water supplies sets the MCL at:
    
    a. 10 b. 2 per sample c. Less than 100 d. None present
     

21. The number of samples collected for total coliform per month is based on:
    
    a. How much water is pumped. b. Population served. c. The price per gallon of water sold. d. The district engineers travel budget.
     

22. Samples for total bacteria should be collected at what points of the system?
    
    a. End points. b. Random representative samples c. City Hall d. Your parents house.
     

23. Total Coliform samples should be analyzed by the laboratory within how many hours?
    
    a. 10 b. 20 c. 30 d. 40
     

24. When coliform organisms are found in a routine sample, the water supplier must test for?
    
    a. Turbidity b. Fecal and E Coli c. Hardness d. Nitrates
     

25. Nitrites in Minnesota, which are mainly caused by fertilizers, sewage and feedlots, can cause
    “blue baby” syndrome. In Minnesota the Nitrite Level cannot exceed?
    
    a. 50 mg/l b. 1 mg/l c. 100 mg/l d. 10 mg/l
     

26. MDH requires municipalities to add fluoride and monitor the results daily. The report must be
    submitted to the MDH with the optimal target range being?
    
    a. 10 mg/l b. 8 mg/l c. 1.2 mg/l d. 33 mg/l
     

27. Results of bacteriological analysis must be kept for how many years?
    
    a. 5 b. 15 c. 10 d. 100
     

28. How many inches above the final grade or above the finished floor elevation shall well casings
    extend vertically?
    
    a. 24 b. 12 c. 36 d. 48
     

29. How many feet above the highest known flood record should the floor of the well house be
    at the minimum?
    
    a. 1 foot b. 2 foot 6 inches c. 5 feet d. 10 feet
     

30. The grade around the well house shall slope away from the well so that water will not pond
    within how many feet of the well?
    
    a. 10 b. 50 c. 100 d. 200
     

31. When hydrofluosilicic acid is used, the point of application in a horizontal pipe shall be in
    which part of the pipe?
    
    a. Upper b. Lower c. Somewhere downstream d. Middle
     

32. A chlorine room shall have an exhaust ventilation fan that provides at least how many air
    exchanges per minute?
    
    a. 1 b. 5 c. 10 d. 12
     

33. All storage reservoirs shall have overflow brought down to and elevation of?
    
    a. 12 - 24 inches b. 36 - 48 inches c. 48 - 60 inches d. 60 - 72 inches
     

34. The distribution system shall maintain a minimum working of:
    
    a. 20 b. 35 c. 50 d. 65
     

35. Normal working pressure should be between _______ and  ______ psi:
    
    a. 20 - 30 b. 40 - 50 c. 60 - 80 d. 80 - 100
     

36. Newly installed piping should be pressure tested for leaks and disinfected with 50 ppm of free
    chlorine for how many hours before being flushed and tested for bacteriological safety and put into service.
    
    a. 4 b. 8 c. 12 d. 24
     

37. Water mains should be tested at 150 psi for leaks and not drop more than 2 psi in the last _____ hour(s)? 
    
    a. 1 b. 12 c. 24 d. 72
     

38. Water mains shall be laid at least how many feet horizontally from a gravity sanitation sewer,
    storm sewer or septic manhole whenever possible?
    
    a. 10 feet b. 20 feet c. 30 feet d. 50 feet
     

39. The best way to eliminate a cross connection is to?
    
    a. Not have threads on fill pipe b. Charge higher rates c. Have an honor system d. Have an air gap fill system
    
    
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