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