Journeyman And Master Plumbing Exam Question Bank With 100% C0rrect Answers

In sizing roof drains, ___________________ percent of a vertical wall which diverts rain water to a roof must be added to the projected roof area when calculating the required storm drainage piping. {Ans: 50}Which of the following is prohibited in a water supply piping system? {Ans: PVC screwed female adapters}Galvanic corrosion of water supply piping can occur where {Ans: steel pipe is joined to a dissimilar metal pipe}The minimum wall thickness for threaded plastic PVC pipe shall be {Ans: schedule 80}Refer to the table at the end of this exam. An 8" building sewer with an 1/8" per foot grade is approved for what maximum drainage fixture unit load? {Ans: 2800 fixture units}Who can approve a backflow prevention device? {Ans: The authority having jurisdiction}