Here are 4 practice questions that will help you prepare for the exam. They were taken from a helpful Water Distribution Study Guide.\u00a0<\/span><\/p>\n

 <\/p>\n

On the Water Distribution Operator Certification Exam, you’ll be tested on similar types of questions.\u00a0 Therefore, you should be prepared to answer the following types of questions on test-day.\u00a0\u00a0<\/span><\/p>\n

 <\/p>\n

Try to answer these questions by yourself.\u00a0 I placed the answers at the bottom of the page, with explanations.\u00a0 Good luck.<\/span><\/p>\n

 <\/p>\n

 <\/p>\n

Water Distribution Study Guide<\/span><\/strong><\/h2>\n

 <\/p>\n

 <\/p>\n

PRACTICE QUESTIONS:<\/span><\/strong><\/span><\/h2>\n

 <\/p>\n

 <\/p>\n

\n
1. What chemicals are formed when chlorine is mixed with water?<\/span><\/li>\n<\/ol>\n

    <\/p>\n

   a.\u00a0 Hydrogen sulfide and ammonia<\/span><\/p>\n

   b.\u00a0 DPD and carbon dioxide<\/span><\/p>\n

   c.\u00a0 Sodium hypochlorite and calcium hypochlorite<\/span><\/p>\n

   d.\u00a0 Hypochlorous acid and hydrochloric acid<\/span><\/p>\n

    <\/p>\n

    <\/p>\n

    <\/p>\n

   2.\u00a0 Which pump component prevents leakage from the pump discharge to the suction?<\/span><\/p>\n

    <\/p>\n

   a.\u00a0 Lantern ring<\/span><\/p>\n

   b.\u00a0 Volute<\/span><\/p>\n

   c.\u00a0 Wear ring<\/span><\/p>\n

   d.\u00a0 Shaft sleeve<\/span><\/p>\n

    <\/p>\n

    <\/p>\n

    <\/p>\n

   3.Which meter relies on a bypass meter to measure the flow through the main line?<\/span><\/p>\n

    <\/p>\n

   a.\u00a0 Compound meter<\/span><\/p>\n

   b.\u00a0 Proportional meter<\/span><\/p>\n

   c.\u00a0 Orifice meter<\/span><\/p>\n

   d.\u00a0 Venturi meter<\/span><\/p>\n

    <\/p>\n

    <\/p>\n

    <\/p>\n

   4.Which of the following is a special type of check valve, used to prevent water from draining out of the suction side of the pump?<\/span><\/p>\n

    <\/p>\n

   a.\u00a0 Globe valve<\/span><\/p>\n

   b.\u00a0 Diaphragm valve<\/span><\/p>\n

   c.\u00a0 Air release valve<\/span><\/p>\n

   d.\u00a0 Foot valve<\/span><\/p>\n

    <\/p>\n

    <\/p>\n

    <\/p>\n

   5. What is a cone of depression?<\/span><\/p>\n

    <\/p>\n

   a.\u00a0 Depth of groundwater when the well-pump is not operating.<\/span><\/p>\n

   b.\u00a0 A seal located around a well, to prevent groundwater contamination.<\/span><\/p>\n

   c.\u00a0 A cone-shaped depression of the groundwater around the well, caused by pumping.<\/span><\/p>\n

   d.\u00a0 The vertical distance between the pumping water level and the ground surface.<\/span><\/p>\n

    <\/p>\n

    <\/p>\n

   HELPFUL RESOURCES:<\/span><\/strong><\/h2>\n

   Water Distribution Operator Certification Classes<\/a><\/span><\/p>\n

   Practice Exams: Water Distribution<\/a><\/span><\/p>\n

    <\/p>\n

    <\/p>\n

    <\/p>\n

    <\/p>\n

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

    <\/p>\n

   1. Answer: D,\u00a0Hypochlorous acid and hydrochloric acid<\/span><\/strong><\/h2>\n

    <\/p>\n

   When chlorine is mixed with water, two acids are formed:\u00a0 hypochlorous acid and hydrochloric acid.<\/span><\/p>\n

    <\/p>\n

   <\/a><\/p>\n

    <\/p>\n

   Since acids are formed, the pH of water will decrease when chlorine is mixed with water.\u00a0 Remember – acids have low pH.<\/span><\/p>\n

    <\/p>\n

   <\/a><\/p>\n

    <\/p>\n

   Among the two acids that are formed, hypochlorous acid is the chemical that provides disinfection power.\u00a0 Hypochlorous acid is a very effective disinfectant.<\/span><\/p>\n

    <\/p>\n

   <\/a><\/p>\n

    <\/p>\n

   There’s a lot more information about disinfection that you’ll need to know for the exam.\u00a0 In fact, disinfection is the most commonly-tested topic on the operator exam.\u00a0 Therefore, make sure to study all aspects of disinfection before test-day.\u00a0\u00a0<\/span><\/p>\n

    <\/p>\n

    <\/p>\n

    <\/p>\n

   2. Answer:\u00a0 C, Wear ring<\/span><\/strong><\/h2>\n

    <\/p>\n

   A pump relies on a spinning impeller to move the water out of the pump.\u00a0 The spinning impeller is located in a casing, as shown below.<\/span><\/p>\n

    <\/p>\n

   <\/a><\/p>\n

    <\/p>\n

   The blue arrow labeled “suction”, shows the water flowing into the pump.\u00a0 Meanwhile, the other blue arrow labeled “discharge”, shows the water flowing out of the pump.<\/span><\/p>\n

    <\/p>\n

   The wear ring is a metallic ring located between the impeller and casing.\u00a0 See below.<\/span><\/p>\n

    <\/p>\n

   <\/a><\/p>\n

    <\/p>\n

   Its purpose is to prevent discharge water from leaking towards the suction, through the gap between the impeller and casing.\u00a0 It’s also designed to allow a small clearance between the impeller and casing, so that they do not rub against each other when the impeller is spinning.\u00a0\u00a0<\/span><\/p>\n

    <\/p>\n

   Wear rings are intended to be replaced occasionally.\u00a0 Over time, they will erode as a result of water leaking through the small clearance.\u00a0 It’s much cheaper to replace wear rings, instead of buying new impellers or casings.\u00a0 Therefore, wear rings are an important part of a pump.\u00a0 \u00a0<\/span><\/p>\n

    <\/p>\n

   <\/a><\/p>\n

    <\/p>\n

   Additionally, for the operator exam, make sure to study all major parts of a centrifugal pump, as listed below:<\/span><\/p>\n

   \n
   • Lantern ring<\/span><\/li>\n
   • Impeller<\/span><\/li>\n
   • Volute<\/span><\/li>\n
   • Shaft<\/span><\/li>\n
   • Shaft sleeve<\/span><\/li>\n
   • Mechanical seal<\/span><\/li>\n
   • Packings<\/span><\/li>\n
   • Stuffing box<\/span><\/li>\n
   • Motor<\/span><\/li>\n<\/ul>\n

      <\/p>\n

      <\/p>\n

      <\/p>\n

     3. Answer:\u00a0 B, Proportional meter<\/span><\/strong><\/h2>\n

      <\/p>\n

     A proportional meter is a type of water meter, used to measure the flow through larger pipes.\u00a0 They are intended to measure high flow rates, such as a fire service line.\u00a0 A proportional meter is similar to the following arrangement.\u00a0\u00a0<\/span><\/p>\n

      <\/p>\n

     <\/a><\/p>\n

      <\/p>\n

      <\/p>\n

     A proportional meter consists of a small bypass meter, located parallel to the main pipe.\u00a0 This bypass meter is calibrated to measure the flow through the main pipe.\u00a0\u00a0<\/span><\/p>\n

      <\/p>\n

     When water flows through the main pipe, some of it is diverted to the bypass meter, as shown below.\u00a0 This is caused by a restriction inside the main pipe.<\/span><\/p>\n

      <\/p>\n

     <\/a><\/p>\n

     In summary, a proportional meter measures the flow through the main pipe with a bypass meter.<\/span><\/p>\n

      <\/p>\n

      <\/p>\n

      <\/p>\n

     4.\u00a0 Answer:\u00a0 D, Foot valve<\/span><\/strong><\/h2>\n

      <\/p>\n

     A foot valve is a special type of check valve, used on a pump.\u00a0 Its purpose is to prevent water from flowing out of the suction side of a pump.\u00a0 The suction side is the inlet of the pump.\u00a0 Here’s what a foot valve looks like:<\/span><\/p>\n

     <\/a><\/p>\n

      <\/p>\n

     A foot valve is important for a centrifugal pump because the pump will not start if it’s not filled with water.\u00a0 A foot valve prevents water from draining out of the pump, from the suction side.\u00a0<\/span><\/p>\n

      <\/p>\n

     It keeps the pump “primed”, which means “the pump is filled with water”.\u00a0 If water drained out of the pump, it would not start.\u00a0 Therefore, a foot valve is required to ensure the pump will start.<\/span><\/p>\n

     <\/a><\/p>\n

      <\/p>\n

      <\/p>\n

      <\/p>\n

     5.\u00a0 Answer:\u00a0 C, Cone of depression<\/span><\/strong><\/h2>\n

     The Cone of Depression is the shape of the groundwater surface surrounding a well, when the pump is operating.\u00a0 As you can see in the drawing below, the water surface bends downward towards the well.\u00a0 <\/span><\/p>\n

      <\/p>\n

     This is caused by the well-pump because it’s sucking groundwater into the well.\u00a0 The Cone of Depression is simply the shape of the groundwater surface, when the pump is operating.\u00a0 The water surface is shaped like an inverted cone.<\/span><\/p>\n

     <\/a><\/p>\n

      <\/p>\n

      <\/p>\n

     Additionally, for the Water Distribution Operator Exam, make sure to learn other characteristics of a well, such as the following:<\/span><\/p>\n

     \n
     • Static Water Level,<\/span><\/li>\n
     • Pumping Water Level<\/span><\/li>\n
     • Well Drawdown<\/span><\/li>\n
     • Radius of Influence,<\/span><\/li>\n
     • Zone of Influence<\/span><\/li>\n
     • Sanitary Seal<\/span><\/li>\n
     • Water Table<\/span><\/li>\n
     • Aquifer\u00a0<\/span><\/li>\n
     • Confined aquifer<\/span><\/li>\n
     • Unconfined aquifer<\/span><\/li>\n<\/ul>\n

        <\/p>\n

        <\/p>\n

       My Advice to You:<\/span><\/strong><\/span><\/h2>\n

       Often, many people ask me for tips on how to pass their exam.\u00a0 I tell them this:<\/span><\/p>\n

       \n
       1. \u00a0Enroll in a helpful course to learn the concepts.<\/span><\/li>\n
       2. Then, solve lots of practice questions.<\/span><\/li>\n<\/ol>\n

           <\/p>\n

          If you use this method, and spend a lot of time studying, you’ll increase your chances of success.\u00a0 From now to test-day, focus on studying hard.\u00a0 Try to remove any distractions, and concentrate on working towards your goal.<\/span><\/p>\n

           <\/p>\n

           <\/p>\n

          HELPFUL RESOURCES:<\/span><\/strong><\/h2>\n

          Water Distribution Operator Certification Classes<\/a><\/span><\/p>\n

          Practice Exams: Water Distribution<\/a><\/span><\/p>\n

          <\/h2>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

          If you’re looking for more practice problems, click the following link: Practice Questions for Water Distribution Operator Certification Exam.<\/a><\/span><\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

          Here are 4 practice questions that will help you prepare for the exam. They were taken from a helpful Water Distribution Study Guide.\u00a0   On the Water Distribution Operator Certification Exam, you’ll be tested on similar types of questions.\u00a0 Therefore, you should be prepared to answer the following types of questions on test-day.\u00a0\u00a0   Try …<\/p>\n

          Water Distribution Study Guide<\/span> Read More \u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":3272,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[109],"tags":[],"jetpack_featured_media_url":"https:\/\/www.waterandwastewatercourses.com\/wp-content\/uploads\/2019\/08\/water-distribution-study-guide-classes-courses.jpg","_links":{"self":[{"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/posts\/3180"}],"collection":[{"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/comments?post=3180"}],"version-history":[{"count":73,"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/posts\/3180\/revisions"}],"predecessor-version":[{"id":3285,"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/posts\/3180\/revisions\/3285"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/media\/3272"}],"wp:attachment":[{"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/media?parent=3180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/categories?post=3180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.waterandwastewatercourses.com\/wp-json\/wp\/v2\/tags?post=3180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}