IRC ACTUAL TEST PAPER 2025/2026 QUESTIONS
WITH ANSWERS GRADED A+
✔✔Gas APPLIANCE shutoff valves shall be located in the same room as the
APPLIANCE and not further than _____ feet from the APPLIANCE. - ✔✔6 (Each
appliance shall be provided with a shutoff valve separate from the appliance.)
✔✔Fuel gas appliance connectors shall not exceed an overall length of _____ feet. -
✔✔6
✔✔Gas vents over 12 inches in size shall terminate not less than _____ feet above the
highest point where they pass through the roof. - ✔✔2 (Amd at least 2 feet higher than
any portion of a building within 10 feet)
✔✔Underground fuel gas PIPING SYSTEMS shall be installed a minimum depth of
_____ inches below grade. - ✔✔12 (Except that individual lines to outside lights, grills or
other appliances shall be installed a minimum of 8 inches below grade, provided it is not
subject to physical damage.)
✔✔Shield plates, when required to cover the area of concealed gas piping, shall be a
minimum _____ gage. - ✔✔No. 16
✔✔Where gas piping is concealed and run within _____ inches from the framing
member face to which the membranes will be attached it shall be protected by shield
plates. - ✔✔1 1/2
✔✔Fuel gas PIPING installed across roof surfaces shall be elevated not less than
_____ inches above the roof surface. - ✔✔3 1/2
✔✔BTU is the abbreviation for _____ _____ _____, which is the quantity of heat
required to raise the temperature of 1 pound of water 1°F. - ✔✔British Thermal Unit
✔✔When doing a water test on DWV systems during rough-in plumbing, each section
shall be filled with water to a point not less than _____ feet above the highest fitting in
that section. - ✔✔5 (Water shall be held in the section under test for 15 minutes. The
system shall prove leak free by visual inspection.)
✔✔When doing an air test on DWV systems during rough-in plumbing, the portion
under test shall be maintained at _____ psi for _____ minutes. - ✔✔5 & 15
✔✔Water service pipe shall be installed not less than _____ inches deep and not less
than _____ inches below frost line. - ✔✔12 & 6
, ✔✔Trenching installed parallel to footings shall not extend below the _____-degree
bearing plane of the bottom edge of a wall or footing. - ✔✔45
✔✔In plumbing systems, supports for 1-inch copper or copper allow tubing run
horizontal shall not be spaced more than _____ feet apart. - ✔✔6 (Review and know
how to use this table.)
✔✔Fixture tail pieces shall not be less than _____ inches in diameter for sinks,
dishwashers, laundry tubs and similar fixtures. - ✔✔1 1/2 (And not less than 1 1/4
inches in diameter for bidets, lavatories and similar fixtures. )
✔✔The center line of water closets or bidets shall not be set less than _____ inches
from adjacent side walls or partitions. - ✔✔15
✔✔There shall be at least _____ inches clearance in front of the water closet, bidet or
lavatory to any wall, fixture or door. - ✔✔21
✔✔Waste receptor standpipes shall extend a minimum of _____ inches and a
maximum of _____ inches above the trap weir. - ✔✔18 & 42 (Access shall be provides
to all standpipe traps and drains for rodding.)
✔✔Shower compartments shall have at least _____ square inches of interior cross-
secrional area. - ✔✔900
✔✔Lavatories shall have waste outlets not less than _____ inches in diameter. - ✔✔1
1/4 (A strainer, pop-up stoper, crossbar or other device shall be provided to restrict the
clear opening of the waste outlet.)
✔✔Bathtubs shall be equipped with waste outlets and overflow outlets connected to
piping at least _____ inches in diameter. - ✔✔1 1/2 (The waste outlet shall be equipped
with an approved stopper.)
✔✔Sinks shall be provided with waste outlets not less than _____ inches in diameter. -
✔✔1 1/2 (A strainer, crossbar or other device shall be provided to restrict the clear
opening of the waste outlet.)
✔✔Each compartment of a laundry tub shall be provided with a waste outlet not less
than _____ inches in diameter. - ✔✔1 1/2 (A strainer or crossbar to restrict the clear
opening of the waste outlet.)
WITH ANSWERS GRADED A+
✔✔Gas APPLIANCE shutoff valves shall be located in the same room as the
APPLIANCE and not further than _____ feet from the APPLIANCE. - ✔✔6 (Each
appliance shall be provided with a shutoff valve separate from the appliance.)
✔✔Fuel gas appliance connectors shall not exceed an overall length of _____ feet. -
✔✔6
✔✔Gas vents over 12 inches in size shall terminate not less than _____ feet above the
highest point where they pass through the roof. - ✔✔2 (Amd at least 2 feet higher than
any portion of a building within 10 feet)
✔✔Underground fuel gas PIPING SYSTEMS shall be installed a minimum depth of
_____ inches below grade. - ✔✔12 (Except that individual lines to outside lights, grills or
other appliances shall be installed a minimum of 8 inches below grade, provided it is not
subject to physical damage.)
✔✔Shield plates, when required to cover the area of concealed gas piping, shall be a
minimum _____ gage. - ✔✔No. 16
✔✔Where gas piping is concealed and run within _____ inches from the framing
member face to which the membranes will be attached it shall be protected by shield
plates. - ✔✔1 1/2
✔✔Fuel gas PIPING installed across roof surfaces shall be elevated not less than
_____ inches above the roof surface. - ✔✔3 1/2
✔✔BTU is the abbreviation for _____ _____ _____, which is the quantity of heat
required to raise the temperature of 1 pound of water 1°F. - ✔✔British Thermal Unit
✔✔When doing a water test on DWV systems during rough-in plumbing, each section
shall be filled with water to a point not less than _____ feet above the highest fitting in
that section. - ✔✔5 (Water shall be held in the section under test for 15 minutes. The
system shall prove leak free by visual inspection.)
✔✔When doing an air test on DWV systems during rough-in plumbing, the portion
under test shall be maintained at _____ psi for _____ minutes. - ✔✔5 & 15
✔✔Water service pipe shall be installed not less than _____ inches deep and not less
than _____ inches below frost line. - ✔✔12 & 6
, ✔✔Trenching installed parallel to footings shall not extend below the _____-degree
bearing plane of the bottom edge of a wall or footing. - ✔✔45
✔✔In plumbing systems, supports for 1-inch copper or copper allow tubing run
horizontal shall not be spaced more than _____ feet apart. - ✔✔6 (Review and know
how to use this table.)
✔✔Fixture tail pieces shall not be less than _____ inches in diameter for sinks,
dishwashers, laundry tubs and similar fixtures. - ✔✔1 1/2 (And not less than 1 1/4
inches in diameter for bidets, lavatories and similar fixtures. )
✔✔The center line of water closets or bidets shall not be set less than _____ inches
from adjacent side walls or partitions. - ✔✔15
✔✔There shall be at least _____ inches clearance in front of the water closet, bidet or
lavatory to any wall, fixture or door. - ✔✔21
✔✔Waste receptor standpipes shall extend a minimum of _____ inches and a
maximum of _____ inches above the trap weir. - ✔✔18 & 42 (Access shall be provides
to all standpipe traps and drains for rodding.)
✔✔Shower compartments shall have at least _____ square inches of interior cross-
secrional area. - ✔✔900
✔✔Lavatories shall have waste outlets not less than _____ inches in diameter. - ✔✔1
1/4 (A strainer, pop-up stoper, crossbar or other device shall be provided to restrict the
clear opening of the waste outlet.)
✔✔Bathtubs shall be equipped with waste outlets and overflow outlets connected to
piping at least _____ inches in diameter. - ✔✔1 1/2 (The waste outlet shall be equipped
with an approved stopper.)
✔✔Sinks shall be provided with waste outlets not less than _____ inches in diameter. -
✔✔1 1/2 (A strainer, crossbar or other device shall be provided to restrict the clear
opening of the waste outlet.)
✔✔Each compartment of a laundry tub shall be provided with a waste outlet not less
than _____ inches in diameter. - ✔✔1 1/2 (A strainer or crossbar to restrict the clear
opening of the waste outlet.)
