Final Water distribution level 3 study guide Exam Q&A

Final Water distribution level 3 study guide Exam Q&A 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 ANSWER100,150,200,250 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 ANSWERStringers 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