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1. Excessive amounts of fluoride in drinking water can cause:
   
   a. Dysentery b. Pipe corrosion c. Mottling of teeth d. Memory loss
    

2. The average level of fluoride concentration in water supplies is:
   
   a. 2.4 ppm b. 0.5 ppm c. 1.7 ppm d. 1.2 ppm
    

3. In order to prevent the over feeding of fluoride, this device is required.
   
   a. Weigh scale b. Break box c. Check valve d. Foot valve
    

4. Fluoride concentrations must be checked:
   
   a. weekly b. monthly c. daily d. bi-weekly
    

5. The piece of safety equipment not needed when working with fluoride is:
   
   a. Neoprene apron b. Gloves c. Safety glasses d. Safety vest
    

6. In order to prevent against indoor acid fumes and electrical corrosion, ________ is used.
   
   a. Break box b. Ventilation c. Dilution d. Weak solution
    

7. Fluoride should enter the _________ of the discharge pipe.
   
   a. Upper half b. Under side c. At the top d. Lower half
    

8. A typical method of testing fluoride concentration is the _______ method.
   
   a. DPD b. FLOU3 c. STS d. SPADNS
   
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