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ASSIGNMENT QUESTIONS - 14071_518
ASSIGNMENT QUESTIONS - 14071_520

Engineering Aid 2 - Intermediate Structural engineering guide book
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2-42. 2-43. 2-44. 2-45. 2-46. Before the quality of a water source  can  be  deemed  suitable  for human needs, what action must first be  taken? 1. Filtering 2. Treating 3. Disinfecting 4. Testing What special development process or action  must  be  performed  to  make brackish  water  acceptable  as  a water supply for human needs? 1. Desalination 2. Chlorination 3. Sedimentation Which of the following descriptions best define a water supply system? 1. All of the piping used to transport  water 2. All  of  the  piping,  reservoirs, and  system  accessories  used  to transport  and  store  water 3. All of the facilities, equipment,  and  piping  used  to obtain, treat, and transport water 4. A  combination  of  connected pipes  that  carry  supplied  water to its users Learning  Objective:  Describe  the elements and layout of a water distribution  system. Large  size  water  lines  that interconnect  with  smaller distribution mains are called 1. trunk mains 2. arterial  mains 3. branch  mains 4. feeder  mains What system accessories are used for  fire-fighting  purposes? 1. 2. 3. 4. Valves Hydrants Booster  stations Backflow   preventers 2-47. 2-48. 2-49. 2-50. Which of the following components should be used to protect against nonpotable  water  contaminating  the water system? 1. Booster  valve 2. Main-line  meter 3. Backflow  preventer 4. Service conection What type of branch is best for water distribution? 1. Loop 2. Tree 3. Cross 4. Lateral On branch mains, a shutoff valve should be installed at what distance from the feeder? 1. 25  feet 2. 50 feet 3. 75  feet 4. As  close  as  possible Under  preferable  conditions,  a hydrant  should  be  located  no  closer than how many feet from a building? 1. 25 2. 50 3. 75 4. 100 IN  ANSWERING  QUESTION  2-51,  REFER  TO FIGURE 2-19 IN YOUR TEXTBOOK. 2-51. For this to be a detailed water distribution drawing that meets MINIMUM  requirements,  which  of  the following  additional  information should be shown for the 10-inch line  that  roughly  parallels  the 1. 2. 3. 4. B & O Railroad tracks? Type of pipe only Type of pipe and the location, size, and type of shutoff valve(s), if any, that are needed  to  isolate  the  line Type of pipe and its depth below  grade Type of pipe and its gradient 13







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