IRC TESTING |QUESTIONS COMPLETE WITH
A+ GRADED ANSWERS
above-grade wall
A wall (50% <) that is mostly above grade and encloses conditioned space. including: basement knee
walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts
[MP] Air Admittance Valve
A one-way valve designed to allow air into the plumbing drainage system when a negative pressure
develops in the piping. This device shall close by gravity and seal the terminal under conditions of zero
differential pressure (no flow conditions) and under positive internal pressure.
Air Barrier
A component of the building envelope system that prohibits air leakage into a building and reduces
the risk of condensation build up. House wrap and fluid- applied air barriers are examples.
Air Break (Drainage System)
An arrangement in which a discharge pipe from a fixture, appliance or device drains indirectly into a
receptor below the flood-level rim of the receptor, and above the trap seal.
Air circulation, forced
A means of providing space conditioning utilizing movement of air through ducts or plenums by
mechanical means
Air Gap (Drainage System)
The unobstructed vertical distance through the free atmosphere between the outlet of the waste pipe
and the flood level rim of the receptacle into which the waste pipe is discharging.
Air Gap (Water Distribution System)
The unobstructed vertical distance through the free atmosphere between the outlet of waste pipe
and the flood-level rim of a plumbing fixture
air conditioning system
A system that consists of heat exchangers, blowers, filters, supply, exhaust and return-air systems,
and shall include any apparatus installed in connection therewith.
AIR-IMPERMEABLE INSULATION
An insulation having an air permanence equal to or less than 0.02 L/s-m2 at 75 Pa pressure
differential tested according to ASTM E 2178 or E 283.
[RB] Alteration
any construction, retrofit or renovation to an existing structure other than a repair or addition which
requires a permit.
Alternative tread device
, device with a service of steps between 50 and 70 degrees from , usually attached to a center support
rail in an alternating manner so that the user does not have both feet on the same level at the same
time
[RB] Anchored stone or masonry veneer
stone or masonry veneer secured with approved mechanical fasteners to an approved backing.
Anchors
Antisiphon
A term applied to valves or mechanical devices that eliminate siphonage.
Appliance
a device or apparatus that is manufactured and designed to utilize energy and for which this code
provides specific requirements
Approved
Acceptable to the building official.
Approved Agency
An established and recognized agency regularly engaged in conducting tests or furnishing inspection
services, when such agency has been approved by the building official.
approved source
an independent person, firm or corporation, approved by the building official, who is competent and
experienced in the application of engineering principles to materials, methods or system analyses
aspect ratio
ratio of longest to shortest perpendicular dimensions, or for wall sections, the ratio height length
attic
unfinished space between celling and roof assembly
ATTIC, HABITABLE
a finished or unfinished habitable space within an attic
automatic
[MP] black flow, drainage
A reversal of flow in the drainage system
[MP] Blackflow, water distribution
the flow of water to other liquids into the potable water-supplying piping from any sources other than
its intended source.ex: backsiphonage
A+ GRADED ANSWERS
above-grade wall
A wall (50% <) that is mostly above grade and encloses conditioned space. including: basement knee
walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts
[MP] Air Admittance Valve
A one-way valve designed to allow air into the plumbing drainage system when a negative pressure
develops in the piping. This device shall close by gravity and seal the terminal under conditions of zero
differential pressure (no flow conditions) and under positive internal pressure.
Air Barrier
A component of the building envelope system that prohibits air leakage into a building and reduces
the risk of condensation build up. House wrap and fluid- applied air barriers are examples.
Air Break (Drainage System)
An arrangement in which a discharge pipe from a fixture, appliance or device drains indirectly into a
receptor below the flood-level rim of the receptor, and above the trap seal.
Air circulation, forced
A means of providing space conditioning utilizing movement of air through ducts or plenums by
mechanical means
Air Gap (Drainage System)
The unobstructed vertical distance through the free atmosphere between the outlet of the waste pipe
and the flood level rim of the receptacle into which the waste pipe is discharging.
Air Gap (Water Distribution System)
The unobstructed vertical distance through the free atmosphere between the outlet of waste pipe
and the flood-level rim of a plumbing fixture
air conditioning system
A system that consists of heat exchangers, blowers, filters, supply, exhaust and return-air systems,
and shall include any apparatus installed in connection therewith.
AIR-IMPERMEABLE INSULATION
An insulation having an air permanence equal to or less than 0.02 L/s-m2 at 75 Pa pressure
differential tested according to ASTM E 2178 or E 283.
[RB] Alteration
any construction, retrofit or renovation to an existing structure other than a repair or addition which
requires a permit.
Alternative tread device
, device with a service of steps between 50 and 70 degrees from , usually attached to a center support
rail in an alternating manner so that the user does not have both feet on the same level at the same
time
[RB] Anchored stone or masonry veneer
stone or masonry veneer secured with approved mechanical fasteners to an approved backing.
Anchors
Antisiphon
A term applied to valves or mechanical devices that eliminate siphonage.
Appliance
a device or apparatus that is manufactured and designed to utilize energy and for which this code
provides specific requirements
Approved
Acceptable to the building official.
Approved Agency
An established and recognized agency regularly engaged in conducting tests or furnishing inspection
services, when such agency has been approved by the building official.
approved source
an independent person, firm or corporation, approved by the building official, who is competent and
experienced in the application of engineering principles to materials, methods or system analyses
aspect ratio
ratio of longest to shortest perpendicular dimensions, or for wall sections, the ratio height length
attic
unfinished space between celling and roof assembly
ATTIC, HABITABLE
a finished or unfinished habitable space within an attic
automatic
[MP] black flow, drainage
A reversal of flow in the drainage system
[MP] Blackflow, water distribution
the flow of water to other liquids into the potable water-supplying piping from any sources other than
its intended source.ex: backsiphonage
