Chapter 11 Storm Drainage exam questions fully solved & updated 2024

Storm water shall not be drained into sewers intended for ______. sanitary drainage only Subsoil drains shall be piped to a _______. storm drain street curb alley The perimeter of buildings having basement, cellars, or crawl spaces or floors below grade shall be provided with _______. subsoil drains All rainwater sumps serving "public use" occupancy buildings shall be provided with ________. dual pumps Roof drains, gutters, vertical conductors or leaders, and horizontal storm drains for primary drainage shall be sized based on ______. 60 minutes 100-year return period The overflow level of the secondary drain inlet above the primary drain inlet shall be not less than ______ inches above the roof. 2 inches Leaders and storm drains, where connected to a combined sewer, shall be ________. trapped All roof drains and secondary drains (overflow drains), except those draining to hanging gutters, shall be equipped with strainers extending above the surface of the roof immediatley adjacent to the drain not less than ________inches. 4 inches An approved material for conductors installed above ground level in buildings is ________. 701.1 ABS Schedule 40 The sizing data for horizontal piping is based on the pipes flowing _______. full Roof drain strainers of the flat surface type may be installed on _______. sun decks Connection between the roof and roof drains that pass through the roof and into the interior of the building shall be made watertight by the use of _______. proper flashing material Roof aras of 10,000 sq. ft. or less shall have no less than (controlled flow roof drainage) _________. 2 drains Storm drain systems shall be tested upon completion of the rough piping by using ________. 10 foot head of water Schedule 40 plastic DWV systems shall not be tested by ______. air Calculations for the controlled flow roof drainage system shall be submitted along with plans to the _______. AHJ The minimum size of a drain leader serving a roof with a projected area of4,613 . and a rainfall rate of 3 inches per hour is ______inches. 4 inches (calculations tables 1101.7, 1101.11 & 1106.3 The minimum size of a horizontal rain water pipe with a 1/8 inch per foot slope, serving a roof with a projected area of 10,700 . , and a rainfall rate of 2 inches per hour is _________inches. 6 inches (calculation using tables) The size of semicircular gutters shall be based on the maximum projected roof area and Table ______. 1106.3 For the purposes of calculating roof area, one vertical wall projecting above a roof will _______. add 50% of wall area to roof fi