Plumbing Year 3 Midterm Exam with Correct Answers 2023

A mathematical process used to accomplish a specific task is known as ________. - Applied mathematics Combustion air ducts shall ________. - Serve a single space Combustion air ducts that terminate in an attic shall _________. - Not be screened Combustion air supplied by using the "standard method" requires a minimum volume of _______. - 50 cu ft per 1,000 btu/hr If the weight of a full tank of water in a water heater is 416.5 pounds, the volume of the tank is _______ gallons. - 50 Providing pipe-bundle weight information to the crane operator is the responsibility of the ________. - Plumber Requirements for installing gas heaters in residential garages and adjacent spaces that open to the garage are: - -If directly on the floor, must be flammable vapor ignition resistant (FVIR) -If access is outside of the garage, combustion air must come from the exterior -Protection from moving vehicles -Burners not less than 18" above the floor Supplying outside combustion air using the "one permanent opening" method requires that the fresh air duct or opening be within 12" of the [a} and be an opening of not less than one square inch per [b] Btu's. - [a] - Ceiling [b] - 3,000 The pipe or duct that connects a fuel-gas-burning water heater to a vent or chimney is a ________. - Vent connector The volume of a length of pipe that is 2 inches in diameter and 6 feet long is _________. - 226.1952 inches cubed To combine spaces to provide for enough combustion air for gas fired appliances you must provide: - -Vent opening(s) of not less than 100 square inches -One vent opening within 12" of the ceiling -Opening(s) not less than one square inch per 1,000 Btu/hr -One vent opening within 12" of the floor Using the "Standard Method" mentioned in 506.2.1, how many cubic feet of space will be needed for a water heater with a draft hood that burns 40,000 Btus/hr? - 2,000 When an interior space isn't large enough to supply combustion air to appliances, the first step to properly sizing the outside air duct is: [a] volume must be divided by the [b] volume to obtain a ratio. - [a] - Space [b] - Required A type B vent is used for venting a listed or approved appliance equipped to burn ______. - Only gas A water heater vented into a fireplace or a chimney serving a fireplace is ________. - Prohibited unless the fireplace flue opening is permanently sealed Corrugated metallic chimney liner must be sized by using table 510.1.2(1) for type B vent, but it't maximum capacity must be reduced by ________ per cent. - 20 Gas vents serving category 1 appliances on more than one floor are _______. - Allowed if the appliances are located in roooms separated form habitable spaces Mechanical draft venting systems (sometimes called "power vents"), shall terminate at least [a] feet below, [b] feet horizontally, [c] feet above any operable window, door or air inlet into a building and not less than [d] inches from finished grade. - [a] - 4 [b] - 4 [c] - 1 [d] - 12