2022 IRC Exam Prediction with COMPLETE SOLUTION | 161
Questions with 100% Correct Answers
Storm drainage sump pumps shall be of a capacity and head appropriate to _______ use
requirements. Correct Answer: anticipated
Electrical services within the scope of the IRC are limited to _____-volt, 0- to _____- ampere,
single-phase systems. Correct Answer: 120/240 & 400
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
Polyethylene tubing for hydronic piping systems shall be installed with _____ ______ joints.
Correct Answer: heat fusion
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)
Vent piping on oil tanks shall be not smaller than _____-inch pipe. Correct Answer: 1 1/4
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
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
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.)
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.)
What size are fuel-gas-fired domestic clothes dryer ducts? Correct Answer: 4 inches
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.)
Vent connectors for draft-hood-equipped appliances shall not be _____ than the draft hood outlet
diameter. Correct Answer: smaller
, A Type B-W gas vent shall terminate at least _____ feet in vertical height above the bottom of
the wall furnace. Correct Answer: 12
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
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.)
Fuel gas appliance connectors shall not exceed an overall length of _____ feet. Correct Answer:
6
Gas vents over 12 inches in size shall terminate not less than _____ feet above the highest point
where they pass through the roof. Correct Answer: 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. Correct Answer: 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. Correct Answer: 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. Correct Answer: 1
1/2
Fuel gas PIPING installed across roof surfaces shall be elevated not less than _____ inches
above the roof surface. Correct Answer: 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. Correct Answer: 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. Correct
Answer: 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. Correct Answer: 5 & 15
Water service pipe shall be installed not less than _____ inches deep and not less than _____
inches below frost line. Correct Answer: 12 & 6
Questions with 100% Correct Answers
Storm drainage sump pumps shall be of a capacity and head appropriate to _______ use
requirements. Correct Answer: anticipated
Electrical services within the scope of the IRC are limited to _____-volt, 0- to _____- ampere,
single-phase systems. Correct Answer: 120/240 & 400
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
Polyethylene tubing for hydronic piping systems shall be installed with _____ ______ joints.
Correct Answer: heat fusion
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)
Vent piping on oil tanks shall be not smaller than _____-inch pipe. Correct Answer: 1 1/4
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
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
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.)
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.)
What size are fuel-gas-fired domestic clothes dryer ducts? Correct Answer: 4 inches
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.)
Vent connectors for draft-hood-equipped appliances shall not be _____ than the draft hood outlet
diameter. Correct Answer: smaller
, A Type B-W gas vent shall terminate at least _____ feet in vertical height above the bottom of
the wall furnace. Correct Answer: 12
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
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.)
Fuel gas appliance connectors shall not exceed an overall length of _____ feet. Correct Answer:
6
Gas vents over 12 inches in size shall terminate not less than _____ feet above the highest point
where they pass through the roof. Correct Answer: 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. Correct Answer: 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. Correct Answer: 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. Correct Answer: 1
1/2
Fuel gas PIPING installed across roof surfaces shall be elevated not less than _____ inches
above the roof surface. Correct Answer: 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. Correct Answer: 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. Correct
Answer: 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. Correct Answer: 5 & 15
Water service pipe shall be installed not less than _____ inches deep and not less than _____
inches below frost line. Correct Answer: 12 & 6
