IRC Revision Questions Correctly Answered
Horizontal insulation used in a frost protected shallow foundation system shall be
protected against damage if it is located less than _______________ inches below
the ground surface.
A. 12
B. 15
C. 18
D. 24 - ✅✅ A
Where waterproofing of a masonry foundation wall is necessary due to the
presence of a high water table, a minimum membrane thickness of
_______________ is required if the waterproofing material is polymer-modified
asphalt.
A. 6-mil
B. 30-mil
C. 40-mil
D. 60-mil - ✅✅ C
Ventilating openings providing under-floor ventilation shall be located so that at
least one such opening is installed a maximum of _______________feet from each
corner of the building.
A. 2
B. 3
C. 5
D. 6 - ✅✅ B
A minimum of _______________ anchor bolt(s) located _______________ of the
plate section is required to anchor maximum 24-inch-long walls connecting offset
braced wall panels.
A. 1, within the middle third
B. 1, within the middle one-half
C. 2, in the outer one-fourths
D. 2, within 6 inches of each end - ✅✅ A
Unless specifically approved, what is the maximum slump permitted for concrete
placed in removable foundation wall forms?
A. 4 inches
,B. 4 1 /2 inches
C. 5 inches
D. 6 inches - ✅✅ D
Where one coat of complying surface-bonding cement is used as the required
dampproofing over the parging of a masonry foundation wall, the cement coating
must be a minimum of _______________ inch thick.
A. 1 /8
B. 3 /16
C. 1 /4
D. 3 /8 - ✅✅ A
Steel columns used as a part of a foundation system shall be a minimum of
_______________ -inch diameter Schedule 40 pipe size or approved equivalent.
A. 3
B. 3 1 /2
C. 4
D. 5 - ✅✅ A
The continuous vapor barrier required in an unvented crawl space shall extend a
minimum of _______________ inches up the stem wall.
A. 3
B. 4
C. 6
D. 8 - ✅✅ C
A minimum design live load of _______________ shall be used for the
determination of the maximum allowable floor joist spans in attics that are
accessed by a fixed stairway.
A. 10 psf
B. 20 psf
C. 30 psf
D. 40 psf - ✅✅ C
Where 2-inch by 10-inch floor joists of #2 hem-fir are spaced at 16 inches on
center, what is the maximum allowable span where such joists support a sleeping
room and a dead load of 10 psf?
A. 16 feet, 0 inches
B. 16 feet, 10 inches
C. 17 feet, 8 inches
,D. 19 feet, 8 inches - ✅✅ B
Where 2-inch by 10-inch floor joists of #1 spruce-pine-fir are spaced at 16 inches
on center, what is the maximum allowable span where such joists support a living
room and a dead load of 20 psf?
A. 14 feet, 1 inch
B. 15 feet, 5 inches
C. 16 feet, 0 inches
D. 16 feet, 9 inches - ✅✅ A
The International Residential Code is applicable to single-family dwellings a
maximum of _______________ stories in above-grade-plane height.
A. One
B. Two
C. Three
D. Four - ✅✅ C
If there is a conflict in the code between a general requirement and a specific
requirement, the _______________ requirement shall apply.
A. General
B. Specific
C. Least restrictive
D. Most restrictive - ✅✅ B
Provisions of the appendices do not apply unless _______________.
A. Specified in the code
B. Applicable to unique conditions
C. Specifically adopted
D. Relevant to fire or life safety - ✅✅ C
_______________ is the term used in the IRC to describe the individual in charge
of the department of building safety.
A. Building official
B. Code official
C. Code administrator
D. Chief building inspector - ✅✅ A
The building official has the authority to _______________ the provisions of the
code.
A. Ignore
, B. Waive
C. Violate
D. Interpret - ✅✅ D
Used materials may be utilized under which one of the following conditions?
A. They meet the requirements for new materials
B. When approved by the building official
C. Used materials may never be used in new construction
D. A representative sampling is tested for compliance - ✅✅ B
The building official has the authority to grant modifications to the code
_______________.
A. For only those issues not affecting life safety or fire safety
B. For individual cases where the strict letter of the code is impractical
C. Where the intent and purpose of the code cannot be met
D. Related only to administrative functions - ✅✅ B
Unless supporting a surcharge, retaining walls having a maximum height of
__________ inches, measured from the bottom of the footing to the top of the wall,
do not require a permit.
A. 30
B. 36
C. 48
D. 60 - ✅✅ C
Tests performed by _______________ may be required by the building official
where there is insufficient evidence of code compliance.
A. The owner
B. The contractor
C. An approved agency
D. A design professional - ✅✅ C
A permit is not required for the construction of a one-story detached accessory
structure when it has a maximum floor area of _______________ square feet.
A. 100
B. 120
C. 150
D. 200 - ✅✅ D
Horizontal insulation used in a frost protected shallow foundation system shall be
protected against damage if it is located less than _______________ inches below
the ground surface.
A. 12
B. 15
C. 18
D. 24 - ✅✅ A
Where waterproofing of a masonry foundation wall is necessary due to the
presence of a high water table, a minimum membrane thickness of
_______________ is required if the waterproofing material is polymer-modified
asphalt.
A. 6-mil
B. 30-mil
C. 40-mil
D. 60-mil - ✅✅ C
Ventilating openings providing under-floor ventilation shall be located so that at
least one such opening is installed a maximum of _______________feet from each
corner of the building.
A. 2
B. 3
C. 5
D. 6 - ✅✅ B
A minimum of _______________ anchor bolt(s) located _______________ of the
plate section is required to anchor maximum 24-inch-long walls connecting offset
braced wall panels.
A. 1, within the middle third
B. 1, within the middle one-half
C. 2, in the outer one-fourths
D. 2, within 6 inches of each end - ✅✅ A
Unless specifically approved, what is the maximum slump permitted for concrete
placed in removable foundation wall forms?
A. 4 inches
,B. 4 1 /2 inches
C. 5 inches
D. 6 inches - ✅✅ D
Where one coat of complying surface-bonding cement is used as the required
dampproofing over the parging of a masonry foundation wall, the cement coating
must be a minimum of _______________ inch thick.
A. 1 /8
B. 3 /16
C. 1 /4
D. 3 /8 - ✅✅ A
Steel columns used as a part of a foundation system shall be a minimum of
_______________ -inch diameter Schedule 40 pipe size or approved equivalent.
A. 3
B. 3 1 /2
C. 4
D. 5 - ✅✅ A
The continuous vapor barrier required in an unvented crawl space shall extend a
minimum of _______________ inches up the stem wall.
A. 3
B. 4
C. 6
D. 8 - ✅✅ C
A minimum design live load of _______________ shall be used for the
determination of the maximum allowable floor joist spans in attics that are
accessed by a fixed stairway.
A. 10 psf
B. 20 psf
C. 30 psf
D. 40 psf - ✅✅ C
Where 2-inch by 10-inch floor joists of #2 hem-fir are spaced at 16 inches on
center, what is the maximum allowable span where such joists support a sleeping
room and a dead load of 10 psf?
A. 16 feet, 0 inches
B. 16 feet, 10 inches
C. 17 feet, 8 inches
,D. 19 feet, 8 inches - ✅✅ B
Where 2-inch by 10-inch floor joists of #1 spruce-pine-fir are spaced at 16 inches
on center, what is the maximum allowable span where such joists support a living
room and a dead load of 20 psf?
A. 14 feet, 1 inch
B. 15 feet, 5 inches
C. 16 feet, 0 inches
D. 16 feet, 9 inches - ✅✅ A
The International Residential Code is applicable to single-family dwellings a
maximum of _______________ stories in above-grade-plane height.
A. One
B. Two
C. Three
D. Four - ✅✅ C
If there is a conflict in the code between a general requirement and a specific
requirement, the _______________ requirement shall apply.
A. General
B. Specific
C. Least restrictive
D. Most restrictive - ✅✅ B
Provisions of the appendices do not apply unless _______________.
A. Specified in the code
B. Applicable to unique conditions
C. Specifically adopted
D. Relevant to fire or life safety - ✅✅ C
_______________ is the term used in the IRC to describe the individual in charge
of the department of building safety.
A. Building official
B. Code official
C. Code administrator
D. Chief building inspector - ✅✅ A
The building official has the authority to _______________ the provisions of the
code.
A. Ignore
, B. Waive
C. Violate
D. Interpret - ✅✅ D
Used materials may be utilized under which one of the following conditions?
A. They meet the requirements for new materials
B. When approved by the building official
C. Used materials may never be used in new construction
D. A representative sampling is tested for compliance - ✅✅ B
The building official has the authority to grant modifications to the code
_______________.
A. For only those issues not affecting life safety or fire safety
B. For individual cases where the strict letter of the code is impractical
C. Where the intent and purpose of the code cannot be met
D. Related only to administrative functions - ✅✅ B
Unless supporting a surcharge, retaining walls having a maximum height of
__________ inches, measured from the bottom of the footing to the top of the wall,
do not require a permit.
A. 30
B. 36
C. 48
D. 60 - ✅✅ C
Tests performed by _______________ may be required by the building official
where there is insufficient evidence of code compliance.
A. The owner
B. The contractor
C. An approved agency
D. A design professional - ✅✅ C
A permit is not required for the construction of a one-story detached accessory
structure when it has a maximum floor area of _______________ square feet.
A. 100
B. 120
C. 150
D. 200 - ✅✅ D
