IRC Plumbing Practice Test Question With Correct Solutions

IRC Plumbing Practice Test Question With Correct Solutions What is the minimum size of a water meter and service piping in inches for a water supply system of 34 fixture units with a maximum developed length of 200 feet. The water pressure of the system is 35 psi. - Answer -1 Table AP201.1 What is the minimum sized trap that can be used for the drainage system of a bathtub (with or without shower head and/or whirlpool attachments)? - Answer -1.5 Table P3201.7 A water heater pan drain must extend full-size and terminate over a suitably located indirect waste receptor or must extend to the exterior of the building and terminate not less than _____ inches and not more than _____ inches above the adjacent ground surface. - Answer -6, 24 P2801.6.2 A laundry tray waste line is permitted to connect into a standpipe for automatic clothes washer drain. The standpipe must extend not less than _____ above the trap weir and must extend above the flood level rim of the laundry tray. - Answer -30 inches (762 mm) P2706.1.2.1 Clothes closets, linen closets and pantries not exceeding _____ in area, with the smallest dimension not greater than 3 feet (915 mm) and having wall and ceiling surfaces of gypsum board will not require fire sprinklers. - Answer -24 square feet (2.2 m2) P2904.1.1 If a water closet can be removed to provide cleanout access, does that fulfill the cleanout requirement of the code? - Answer -No P3005.2.3 Appliances and equipment used for heating water or storing hot water have to be protected by _____. - Answer -pressure-relief valve and temperature-relief valve or a combination pressure and temperature-relief valve. P2804.1 Where the fixture drains connect at different levels, the common vent must connect as a _____ extension of the _____ drain. - Answer -vertical, vertical P3107.3 The minimum air gap distance in inches for lavatories and other fixtures with effective opening not greater than 1/2 inch in diameter that are close to a wall is: - Answer -1.5 Table P2902.3.1 In areas prone to flooding as established by the code, water supply systems must be designed and constructed to prevent _____ of floodwaters. - Answer -infiltration P2602.2 When either a public water-supply or sewer system, or both, are not available, _____, an individual water-supply or individual sewage-disposal system, or both, must be provided. - Answer -or connection thereto is not feasible P2602.1 _____ installed in a bathroom are not required to be installed within an enclosure. - Answer -direct-vent water heaters M2005.2 For water supply systems used predominantly for flush tanks having a water supply fixture unit load of 12, what is the comparable demand in gallons per minute. - Answer -16.0 Table P2903.6(1) Test equipment, materials and labor must be furnished by the ______ - Answer -permittee P2503.3 The minimum size in inches of a combination waste and vent pipe connecting to a building drain or building sub drain and serving 31 d.f.u. is _____. - Answer -3 Table 3111.3 The outlet of a water heaters pressure relief valve, temperature relief valve or combination valve, must be directly connected to the _____. - Answer -none of the above P2804.6.1 What is the minimum pipe support spacing in feet, required for copper or copper alloy tubing (1 1/4 inch diameter and smaller_ installed in a horizontal orientation. - Answer -6 Table P2605.1 The flow velocity of the water distribution system must be controlled to reduce the possibility of _____. - Answer -water hammer P2903.5 A wet 2 inch vent can handle venting for _____ fixture unit loads. - Answer -4 Table P3108.3 There must be at least _____ inches clearance in front of the water closet, bidet or lavatory to any wall, fixture or door. - Answer -21 P2705.1 Open hub waste receptors must be permitted in the form of a hub or pipe extending not less than _____ inch(es) above a water impervious floor, and are not required to have a strainer. - Answer -1 P2706.1 The minimum air gap distance in inches for sink, laundry trays, gooseneck back faucets and other fixtures with effective openings not greater than 3/4 inch in diameter that are away from a wall is: - Answer -1.5 Table P2902.3.1 Where the drainage piping has been roughed-in for future fixtures, a rough-in connection for a vent must be installed a minimum of _____. - Answer -one-half times the diameter of the drain P3104.6