Chapter 11: Storm Drainage exam questions fully solved & updated 2024

Storm water shall not be drained into sewers intended for ___. A) a combined sewer system B) sanitary drainage only C) a storm drain system D) a storm sewer system b Subsoil drains shall be piped to a ___. A) storm drain B) street curb C) alley D) all of the above d The perimeter of buildings having basements, cellars, or crawl spaces or floors below grade shall be provided with ___. A) backwater valves B) seepage pits C) subsoil drains D) leech lines c All rainwater sumps serving "public use" occupancy buildings shall be provided with ___. A) single pumps B) dual pumps C) separate sumps D) overflow tanks b Roof drains, gutters, vertical conductors or leaders, and horizontal storm drains for primary drainage shall be sized based on ___. A) 30-minute 30-year storm B) 3 inches per hour C) 60-minute 100-year return period D) 6 inches per hour c The overflow level of the secondary drain inlet above the primary drain inlet shall not be less than ___ inch(es) above the roof. A) 1 B) 2 C) 6 D)12 b Leaders and storm drains, where connected to a combined sewer, shall be ___. A) trapped B) identified C) crown vented D) oversized a Of those listed, an approved material for conductors installed above ground level in buildings is ___. A) aluminum B) ABS Schedule C) PVC SDR 35 D) CPVC b The sizing data for horizontal storm drain piping is based on the pipes flowing ___. A) 1/2 full B) 3/4 full C) full D) at 2 percent velocity c Of those listed, roof drain strainers of the flat surface type may be installed on ___. A) sun decks B) any roof C) secondary roof drains D) its upper terminal a Connection between the roof and the roof drains that pass through the roof and into the interior of the building shall be made watertight by the use of ___. A) expansion joints B) caulking compound C) solvent cement D) proper flashing materials d Roof areas of 10,000 square feet or less shall have no less than (controlled flow roof drainage) ___. A) two drains B) one drain C) one primary drain D) one secondary drain(overflow drain) a Of those listed, storm drain systems shall be tested upon completion of the rough piping by using ___. A) 10 foot of head water B) 4.34 psi air C) 4.34 inches mercury D) smoke or peppermint oil a Schedule 40 plastic DWV storm drain systems shall not be tested by ___. A) water B) air C) 10 foot head of water D) water from low to high point b