2015 IRC Plumbing Questions with 100% Correct Answers
Storm drainage sump pumps shall be of a capacity and head appropriate to _______ use
requirements. Correct Answer: anticipated
2015 IRC Section P3303.1.1 Pump capacity and head.
Electrical services within the scope of the IRC are limited to _____-volt, 0- to _____- ampere,
single-phase systems. Correct Answer: 120/240 & 400
2015 IRC Section E3401.2 Scope.
Boiler pressure-relief valve discharge shall be pipes to drains by gravity to within _____ inches
of the floor or to an open receptor. Correct Answer: 18
2015 IRC Section M2002.4 Pressure-relief valve.
Polyethylene tubing for hydronic piping systems shall be installed with _____ ______ joints.
Correct Answer: heat fusion
2015 IRC Section M2104.2 Piping joints, Item 2.
The maximum amount of fuel oil stored above ground or inside a building shall be _____
gallons. Correct Answer: 660 (The supply tank shall be supported on rigid noncombustible
supports to prevent settling or shifting)
2015 IRC Section M2201.2 Above-ground tanks.
Vent piping on oil tanks shall be not smaller than _____-inch pipe. Correct Answer: 1 1/4
2015 IRC Section M2203.4 Vent piping.
Oil tank vent piping shall terminate outside of building at a point not less than _____ feet,
measured vertically or horizontally, from any building opening. Correct Answer: 2
2015 IRC Section M2203.5 Vent termination.
Components of a solar thermal energy system that might be subject to pressure drops below
atmospheric pressure during operations shall be protected by a _____-_____ _____. Correct
Answer: vacuum-relief valve
2015 IRC Section M 2301.2.4 Vacuum relief.
, The minimum unobstructed total area of the outside and return air ducts or openings to a forced
air warm-air FURNACE shall not be less than _____ square inches for each 1000 Btu/h output
rating. Correct Answer: 2 (This also applies to supply ducts.)
2015 IRC Section G2442.2 Forced-air furnaces.
Domestic clothes dryer transition ducts shall be metal and limited to a single length not to exceed
_____ feet. Correct Answer: 8 (Transition ducts shall not be concealed within construction.)
2015 IRC Section G2439.7.3 Transition ducts.
What size are fuel-gas-fired domestic clothes dryer ducts? Correct Answer: 4 inches
2015 IRC Section G2439.7.1 Material and size.
The lowest portion of a gas floor furnace shall have not less than ______-inch clearance from
grade level. Correct Answer: 6 (Except where the lower 6-inch portion of the floor furnace is
sealed by the manufacturer to prevent entrance of water, the minimum clearance shall be reduced
to not less than 2 inches.)
2015 IRC Section G2437.4 Clearance
Vent connectors for draft-hood-equipped appliances shall not be _____ than the draft hood outlet
diameter. Correct Answer: smaller
2015 IRC Section G2428.3.17 Connector maximum and minimum size.
A Type B-W gas vent shall terminate at least _____ feet in vertical height above the bottom of
the wall furnace. Correct Answer: 12
2015 IRC Section G2427.6.4 Minimum height.
A Type B or a Type L gas vent shall terminate at least _____ feet in vertical height above the
highest connected APPLIANCE DRAFT HOOD or FLUE COLLAR. Correct Answer: 5
2015 IRC Section G 2427.6.4 Minimum Height
Gas APPLIANCE shutoff valves shall be located in the same room as the APPLIANCE and not
further than _____ feet from the APPLIANCE. Correct Answer: 6 (Each appliance shall be
provided with a shutoff valve separate from the appliance.)
2015 IRC Section G2420.5.1 Located within same room.
Fuel gas appliance connectors shall not exceed an overall length of _____ feet. Correct Answer:
6
Storm drainage sump pumps shall be of a capacity and head appropriate to _______ use
requirements. Correct Answer: anticipated
2015 IRC Section P3303.1.1 Pump capacity and head.
Electrical services within the scope of the IRC are limited to _____-volt, 0- to _____- ampere,
single-phase systems. Correct Answer: 120/240 & 400
2015 IRC Section E3401.2 Scope.
Boiler pressure-relief valve discharge shall be pipes to drains by gravity to within _____ inches
of the floor or to an open receptor. Correct Answer: 18
2015 IRC Section M2002.4 Pressure-relief valve.
Polyethylene tubing for hydronic piping systems shall be installed with _____ ______ joints.
Correct Answer: heat fusion
2015 IRC Section M2104.2 Piping joints, Item 2.
The maximum amount of fuel oil stored above ground or inside a building shall be _____
gallons. Correct Answer: 660 (The supply tank shall be supported on rigid noncombustible
supports to prevent settling or shifting)
2015 IRC Section M2201.2 Above-ground tanks.
Vent piping on oil tanks shall be not smaller than _____-inch pipe. Correct Answer: 1 1/4
2015 IRC Section M2203.4 Vent piping.
Oil tank vent piping shall terminate outside of building at a point not less than _____ feet,
measured vertically or horizontally, from any building opening. Correct Answer: 2
2015 IRC Section M2203.5 Vent termination.
Components of a solar thermal energy system that might be subject to pressure drops below
atmospheric pressure during operations shall be protected by a _____-_____ _____. Correct
Answer: vacuum-relief valve
2015 IRC Section M 2301.2.4 Vacuum relief.
, The minimum unobstructed total area of the outside and return air ducts or openings to a forced
air warm-air FURNACE shall not be less than _____ square inches for each 1000 Btu/h output
rating. Correct Answer: 2 (This also applies to supply ducts.)
2015 IRC Section G2442.2 Forced-air furnaces.
Domestic clothes dryer transition ducts shall be metal and limited to a single length not to exceed
_____ feet. Correct Answer: 8 (Transition ducts shall not be concealed within construction.)
2015 IRC Section G2439.7.3 Transition ducts.
What size are fuel-gas-fired domestic clothes dryer ducts? Correct Answer: 4 inches
2015 IRC Section G2439.7.1 Material and size.
The lowest portion of a gas floor furnace shall have not less than ______-inch clearance from
grade level. Correct Answer: 6 (Except where the lower 6-inch portion of the floor furnace is
sealed by the manufacturer to prevent entrance of water, the minimum clearance shall be reduced
to not less than 2 inches.)
2015 IRC Section G2437.4 Clearance
Vent connectors for draft-hood-equipped appliances shall not be _____ than the draft hood outlet
diameter. Correct Answer: smaller
2015 IRC Section G2428.3.17 Connector maximum and minimum size.
A Type B-W gas vent shall terminate at least _____ feet in vertical height above the bottom of
the wall furnace. Correct Answer: 12
2015 IRC Section G2427.6.4 Minimum height.
A Type B or a Type L gas vent shall terminate at least _____ feet in vertical height above the
highest connected APPLIANCE DRAFT HOOD or FLUE COLLAR. Correct Answer: 5
2015 IRC Section G 2427.6.4 Minimum Height
Gas APPLIANCE shutoff valves shall be located in the same room as the APPLIANCE and not
further than _____ feet from the APPLIANCE. Correct Answer: 6 (Each appliance shall be
provided with a shutoff valve separate from the appliance.)
2015 IRC Section G2420.5.1 Located within same room.
Fuel gas appliance connectors shall not exceed an overall length of _____ feet. Correct Answer:
6
