Here are 4 practice questions for the Water Treatment Operator Certification Exam.\u00a0 I included the answers to these questions at the bottom of this page.<\/span><\/p>\n

Water Treatment Operator Certification Exam<\/strong><\/span><\/h2>\n

\n
1. Which statement is true regarding the Interim Enhanced Surface Water Treatment Rule for conventional or direct filtration?<\/span><\/li>\n<\/ol>\n
   \n
   1. Turbidity of the combined filter effluent must be less than 0.5 NTU in at least 90% of samples collected every month<\/span><\/li>\n
   2. The turbidity of the combined filter effluent must be less than or equal to 0.4 NTU in 90% of samples collected every month<\/span><\/li>\n
   3. Turbidity of the combined filter effluent must be less than or equal to 0.3 NTU in at least 95% of samples collected every month<\/span><\/li>\n
   4. The turbidity of the combined filter effluent must be less than 0.2 NTU in 95% of samples collected every month<\/span><\/li>\n<\/ol>\n

      2. What is used to measure the flow rate of chlorine gas?<\/span><\/p>\n

      \n
      1. Proportional meter<\/span><\/li>\n
      2. Nutating-disc meter<\/span><\/li>\n
      3. Compound meter<\/span><\/li>\n
      4. Rotameter<\/span><\/li>\n<\/ol>\n

         3. What could happen if the backwash rate is too high?<\/span><\/p>\n

         \n
         1. Cavitation<\/span><\/li>\n
         2. Mudball formation<\/span><\/li>\n
         3. Excessive loss of filter media<\/span><\/li>\n
         4. Increase in head loss in the filter after backwashing has finished<\/span><\/li>\n<\/ol>\n

            4. Which of the following is a reciprocating pump?<\/span><\/p>\n

            \n
            1. Vertical turbine pump<\/span><\/li>\n
            2. Piston or plunger pump<\/span><\/li>\n
            3. Centrifugal pump<\/span><\/li>\n
            4. Horizontal split-case pump<\/span><\/li>\n<\/ol>\n

               Water Treatment Operator Certification Exam<\/strong><\/span><\/h2>\n

               ANSWERS<\/span><\/strong><\/h2>\n

               1. C<\/span><\/h2>\n

               First of all, the Interim Enhanced Surface Water Treatment Rule is a drinking water regulation.\u00a0 It’s intended to reduce illnesses caused by harmful microorganisms in drinking water. Moreover, it applies to all water systems serving at least 10,000 people, and using surface water or groundwater under the direct influence of surface water.\u00a0\u00a0<\/span><\/p>\n

               This regulation has various requirements.\u00a0 One of the requirements is that the turbidity of the combined filter effluent must be less than or equal to 0.3 NTU in at least 95% of samples collected every month.<\/span><\/p>\n

               Filter effluent is the treated water, flowing out of a filter.\u00a0\u00a0<\/span><\/p>\n

               Turbidity is the cloudiness of the water.\u00a0 It’s caused by suspended solids that make the water appear dirty.\u00a0 Turbidity is measured in NTU, which stands for\u00a0nephelometric turbidity units.\u00a0\u00a0<\/span><\/p>\n

               Again, you’re not allowed to have more than 0.3 NTU in at least 95% of the combined filter effluent samples collected each month.\u00a0 This keeps the water safe to drink.\u00a0\u00a0<\/span><\/p>\n

               <\/a>