Chapter 14 - Water Supply exam with verified solutions
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Chapter 14 - Water Supply
Institution
Chapter 14 - Water Supply
`What are the two types of water supply systems in North America correct answersPublic and Private
`Who generally governs a State authorized water district correct answersAn elected board
`Can private water supply systems sometimes serve municipalities correct answersYes
`Who is responsibl...
`What are the two types of water supply systems in North America correct answersPublic and Private
`Who generally governs a State authorized water district correct answersAn elected board
`Can private water supply systems sometimes serve municipalities correct answersYes
`Who is responsible for managing and inspecting a private water supply correct answersThe facility
owner/occupant
`What are the basic components of most water supply systems correct answersWater Supply Sources,
Processing/Treatment facilitites, Means of moving the water, Storage and Distribution
`How many times saltier is sea water as compared to fresh water correct answers220 times and contains
other impurities
`What are the ways that water is moved through the distribution system correct answersGravity, Direct
Pumping, and Combination (Used by most communities, it uses gravity, pumps, and water storage
towers)
`What is another term for water pressure correct answersHead Pressure
`How many feet higher does the water source need to be in order to provide adequate pressure to the
area it serves correct answers100 feet higher than the highest point in the distribution system
`Gravity System correct answersWater supply system that relies entirely on the force of gravity to create
pressure and cause water to flow through the system. The water supply, which is often an elevated tank,
is at a higher level than the system.
, `Direct Pumping System correct answersWater supply system supplied directly by a system of pumps
rather than elevated storage tanks.
`Where are Direct Pumping Systems most often found correct answersAt agricultural or industrial
facilities
`Water Main correct answersA principle pipe in a system of pipes for conveying water, especially one
installed underground
`Water pipes can be made from many materials, to include: correct answersDuctile Iron, asbestos
cement, Polyvinyl Chloride Plastic (PVC), Concrete
`What do the terms Grid or Gridiron refer to correct answersThe interlocking network of water mains
`What are the different types of water mains correct answersPrimary Feeders, Secondary Feeders,
Distributors
`Discuss the characteristics of Primary Feeders correct answersLarge pipes that feed secondary feeders.
Can be 16" - 72" or more in diameter. Also called Arterial Mains.
Fire hydrants are rarely connected directed to Primary Feeders
`Discuss the characteristics of Secondary Feeders correct answersIntermediate pipes that interconnect
with the primary feeders to create the grid. Usually 12" - 14" in diameter.
Control valves can be used to isolate each secondary.
`Discuss the characteristics of Distributors correct answersSmall water mains. Usually 6 to 8" in diameter.
They usually serve; fire hydrants, industrial, and residential consumers. They can also form a
intermediate grid between secondary feeders. They can also dead-end
with a hydrant or supplied property
`What is recommended to ensure sufficient water supplies at high risk and industrial districts within a
community correct answersThere should be two primary water mains, which travel at different routes to
the high risk areas
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