Exam (elaborations)
Plumbing Exam Q&A
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Which backflow preventer is not a testable device? a. PVB b. DCAP c. RP d. DCVA - Answer- B A flat roof measuring 20m by 26m with a horizontal wall on one side extended up 6m by 20m. Size the circular rain water leader if the local 15 minute rain fall intensity is 24mm? a. 2 b. 7 c. 9 d...
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