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1. Disease-producing organisms in water are also known as waterborne pathogens.
   
   a. True b. False
    

2. The _________ group of bacteria is an indicator that one or more pathogens may be present
   in the drinking water.
   
   a. Total Colilert b. Total Cholera c. Total Coliform
    

3. Sodium thiosulfate is used in water sample containers to:
   
   a. Sterilize the sample container b. Oxidize iron in the water sample c. Oxidize manganese in the water sample d. Neutralize the chlorine in the water sample
    

4. When taking a water sample for bacteria analysis, it is advisable to take a hot water sample and
   to let the water run for 5-6 minutes.
   
   a. True b. False
    

5. Any routine or repeat samples that are found to be positive for total
   coliform bacteria must be analyzed for ________.
   
   a. Iron b. Chlorine residual c. E coli or fecal coliform d. Sodium thiosulfate
    

6. The total coliform group of bacteria is found in the soil and in the waste of warm-blooded animals.
   
   a. True b. False
   
   
   
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