Water distribution level 3(questions with complete solutions)
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Water distribution level 3
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Water Distribution Level 3
A factor or value used to indicate the smoothness of the interior of a pipe
Cfactor
Major parts of water distribution
Pipes, storage facilities, pumping stations, valves ,fire hydrants, meters, and other appurtenances
00:02
01:14
Main purpose of water storage facilities
To pr...
water distribution level 3questions with complete solutions
a factor or value used to indicate the smoothness of the interior of a pipe
major parts of water distribution
main purpose of water storag
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Water distribution level 3
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Water distribution level 3
A factor or value used to indicate the smoothness of the interior of a pipe - Answer
Cfactor
Major parts of water distribution - Answer Pipes, storage facilities, pumping stations,
valves ,fire hydrants, meters, and other appurtenances
Main purpose of water storage facilities - Answer To provide sufficient amount of water
to average or equalize the daily demands on the water supply system
Types of storage facilities - Answer Clear wells, elevated tanks,standpipes,ground level
storage tanks , hydro pneumatic or pressure tanks, and surge tanks
20 psi - Answer Absolute minimum pressure
35 psi - Answer Minimum working pressure
Basic requirements of pipes - Answer Adequate strength, durability,maximum corrosion,
resistance and no adverse effect on water quality
Four classes of working pressure are commonly encountered - Answer
100,150,200,250 psi
Push on and mechanical joints are most often used for - Answer Ductile iron pipe.
Flanges, restrained, flexible, and sleeve joints are also used
Flange joints - Answer Not flexible
Restrained joints - Answer Prevent movement
Flexible joints - Answer Permits one joint to move
PE pipe - Answer Has the highest cfactors 150
Pipe protection - Answer Paint
Rock must be excavated - Answer 6inches
Ladder must b located - Answer 25 ft and 3ft above hole
Laying pipe is also called - Answer Stringing
The horizontal shoring members are generally referred to as - Answer Stringers or
walers
Shield shoring - Answer Consists of a rectangular box that must b open on the top and
bottom and usually the ends are open too
, Water distribution level 3
Solid sheeting - Answer Used when materials will not stand in a vertical position or not
practical to slope the trench
Types of valves - Answer Plug, rotary,butterfly, diaphragm, gate
Entrained - Answer Air to escape a line is operating under pressure
4 parts to a hydrant - Answer Inlet pipe connection from the water supply main,the main
valve,the barrel,the head
Post hydrants - Answer Extend above ground most commonly used
Rule of thumb - Answer Meter should b one size smaller that service line
Backsiphonage - Answer Caused by a negative or below atmospheric pressure within a
water System
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