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Questions 1 - 4: match the correct term to the definition.

1. Occurs when the pressure of the non-potable system exceeds the positive pressure in the
   water distribution lines.
   
   a. Cross Connections b. Backflow c. Back-siphonage d. Backpressure
    
2. Undesired, reversed flow of liquid in a piping system.
   
   a. Cross Connections b. Backflow c. Back-siphonage d. Backpressure
    
3. Occurs when there is a partial vacuum (negative pressures) in a water supply system, drawing the
   water from a contaminated source into the potable water supply.
   
   a. Cross Connections b. Backflow c. Back-siphonage d. Backpressure
    
4. A direct connection of a non-potable water source with a potable source.
   
   a. Cross Connections b. Backflow c. Back-siphonage d. Backpressure
    
5. Which of the following is the most reliable backflow prevention measure?
   
   a. Atmospheric vacuum breaker b. Double check valve assemblies c. Reduced pressure principal backflow prevention assembly (RPZ) d. Air gap e. Pressure-type vacuum breaker assembly
    
6. Reduced pressure zone backflow prevention devices should be inspected annually and
   overhauled every ____ years.
   
   a. 1 b. 3 c. 5 d. 10
    
7. A person certified/licensed by the Minnesota Department of Health shall perform all testing
   and maintenance work on reduced-pressure principal backflow preventers.
   
   a. True b. False
    
8. When using an air gap to provide protection from a cross connection, the vertical distance
   between the supply pipe and the flood-level rim should be ___ times the diameter of the supply pipe,
   but never less than one inch.
   
   a. 0.5 b. 1.0 c. 1.5 d. 2.0
    
9. A prevalent type of cross connection is illustrated by a hose connected to a
   sillcock with the other end of the hose lying in a sink full of polluted or contaminated
   water.  In this case, backflow occurs by _______.
   
   a. Backpressure b. Back-siphonage
   
   
   
   
    
10. A cross connection to an elevated tank containing a non-potable substance can cause backflow by _______. 
    
    a. Backpressure b. Back-siphonage
    
    
    
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