NM CID MM-1 Practice Questions - New Mexico CID MM-1 Plumbing Examination Exam

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Storm-water leaders and horizontal storm drains are sized from rainfall rate and connected roof area. Changing from a 4 inch per hour design rate to a 2 inch per hour design rate, with the same roof area, will:

Reduce the required leader and drain capacity by about one-half Double the required pipe size in inches Have no effect because pipe size is based only on DFU Require the storm drain to connect to the sanitary sewer

Correct Answer:

Reduce the required leader and drain capacity by about one-half

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