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1.  In order to renew a water operator's certificate, continuing education must be completed
     ______ the certificate expires.

     a. anytime b. before c. after d. winter time

2.  Something unhealthy in drinking water is called?

     a. iron b. air c. pressure d. coliform bacteria

3.  In Minnesota, water lines must be buried ___________.

     a. along building walls b. close to sewer lines c. below frost line d. wherever possible

4.  Installing pipes partially buried around a well can help protect the well from _____________.

     a. rain b. traffic c. pedestrians d. snow

5.  A _________ is used to start and stop a well pump.

     a. pressure switch b. electrical conduit c. well screen d. water sampler

6.  The purpose of a well screen is to ____________.

     a. prevent sediment from entering the pump d. keep out mosquitoes b. hold up the well casing c. stabilize the formation

7.  A submersible pump is located _________________.

     a. in a well house b. on top of the ground c. in the basement d. in the well

8.  A backflow preventer is used to prevent _____________.

     a. water hammer b. cavitation c. contaminants from entering the water system d. the use of water by a resident

9.  Some type of water storage is needed to prevent the ______________.

      a. water from running down the street b. well pump from never running c. leakage of water around a pump d. well pump from running excessively     

10.  The Minnesota Plumbing Code dictates the design of _______________.

      a. pump house electrical systems b. chemical feed pumps c. water services and piping d. storage tanks      

11.  Check valves are used to ____________.

      a. permit air to escape from the pipe b. permit flow in only one direction c. regulate velocity d. stop flow in both directions

12.  A drawing showing the location of a water system is called a _____________.

      a. portrait b. operating plan c. operators drawing d. distribution system map

13.  It is recommended to have a _______ to measure daily water usage.

       a. water meter b. electric meter c. gas regulator d. odometer

14.  Pressure tanks and piping in a well house should be _______________.

       a. left to corrode b. kept painted c. well rusted d. neglected

15.  Two major purposes of water storage tanks are to:

       a. prevent corrosion and increase flow rate b. provide pressure and meet demand c. reduce summer usage and e factor d. provide cell antennas and volume to customers

16.  Pressure in distribution lines should not be allowed to drop below zero because _______________.

       a. the lines may collapse b. pumps may be ruined c. contamination by backflow may occur d. a main cannot be tapped

17.  The connection between potable and nonpotable water supply is called a ___________.

       a. vacuum breaker b. closed loop c. cross connection d. service connection

18.  An air gap is used to:

        a. clean lines b. let air in manholes c. test for oxygen d. prevent backflow of nonpotable water into potable water

19.  Potable water is _______.

        a. safe drinking water b. wastewater c. industrial process water d. stream water

20.  An approved device used to prevent backflow and backsiphonage is a _____________.

        a. gate valve b. check valve c. surge tank d. vacuum breaker

21.  Which is the best type of cross connection control between safe and unsafe water supplies?

        a. double check valve b. removable spool c. swing connection d. air gap

22.  All public water systems are required to implement ___________ to help prevent contamination.

       a. a business plan b. adequate pressure zones c. source water protection d. static water plan

23.  Which of the following isn't important to add to an emergency plan?

       a. MDH Staff b. well contractor c. airplane pilot d. plumber

24.  Nonpotable water is safe to drink.

       a. True b. False

25.  A storage tank is an important part of a water system.

        a. True b. False

26.  A daily check of the water system is not important.

        a. True b. False

27.  In case of an emergency, a well house door should remain unlocked.

        a. True b. False

28.  A test for coliform bacteria should show up negative.

        a. True b. False

29.  A well screen is attached to the casing below the level of the groundwater.

        a. True b. False

30.  A pressure gauge is not necessary in a small water system.

       a. True b. False

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