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IRC Exam Prep: Questions and Answers on Residential Building Codes, Exams of Architecture

A series of multiple-choice questions and answers related to the international residential code (irc) for building construction. It covers various aspects of residential building requirements, including stairways, flood hazard areas, smoke alarms, carbon monoxide alarms, and foundation details. The questions test knowledge of specific code provisions and their application in different scenarios, making it a useful resource for students and professionals in architecture, construction, and building inspection. Designed to assess understanding of the irc and its practical implications in residential construction projects. It is a valuable tool for exam preparation and code compliance.

Typology: Exams

2024/2025

Available from 05/28/2025

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IRC TEST NEWEST TEST 2025 | ALL QUESTIONS AND
CORRECT ANSWERS | ALREADY GRADED A+ |
VERIFIED ANSWERS | LATEST EXAM
Where a handrail is provided on one side of a stairway, what is the
minimum required clear width at and below the handrail height?
a. 27 inches
b. 29 inches
c. 31 1 /2 inches
d. 36 inches ---------CORRECT ANSWER-----------------C
Stairways shall have a maximum riser height of _______________ and a
minimum tread run of _______________.
a. 8 1 /4 inches, 9 inches
b. 8 inches, 9 inches
c. 7 3 /4 inches, 10 inches
d. 7 1 /2 inches, 10 inches ---------CORRECT ANSWER-----------------C
The maximum variation between the greatest riser height and the smallest
riser height within any flight of stairs shall be _______________ .
a. 1 /4 inch
b. 3 /8 inch
c. 1 /2 inch
d. 5 /8 inch ---------CORRECT ANSWER-----------------B
Unless a minimum tread depth of _______________ is provided, a
minimum 3 /4-inch nosing is required at the leading edge of all treads.
a. 9 1 /2 inches
b. 10 inches
c. 11 inches
d. 12 inches ---------CORRECT ANSWER-----------------C
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Download IRC Exam Prep: Questions and Answers on Residential Building Codes and more Exams Architecture in PDF only on Docsity!

IRC TEST NEWEST TEST 2025 | ALL QUESTIONS AND

CORRECT ANSWERS | ALREADY GRADED A+ |

VERIFIED ANSWERS | LATEST EXAM

Where a handrail is provided on one side of a stairway, what is the minimum required clear width at and below the handrail height? a. 27 inches b. 29 inches c. 31 1 /2 inches d. 36 inches ---------CORRECT ANSWER-----------------C Stairways shall have a maximum riser height of _______________ and a minimum tread run of _______________. a. 8 1 /4 inches, 9 inches b. 8 inches, 9 inches c. 7 3 /4 inches, 10 inches d. 7 1 /2 inches, 10 inches ---------CORRECT ANSWER-----------------C The maximum variation between the greatest riser height and the smallest riser height within any flight of stairs shall be _______________. a. 1 /4 inch b. 3 /8 inch c. 1 /2 inch d. 5 /8 inch ---------CORRECT ANSWER-----------------B Unless a minimum tread depth of _______________ is provided, a minimum 3 /4-inch nosing is required at the leading edge of all treads. a. 9 1 /2 inches b. 10 inches c. 11 inches d. 12 inches ---------CORRECT ANSWER-----------------C

Unless the stair has a total rise of no more than 30 inches, the opening between treads at open risers shall be such that a minimum _______________ sphere shall not pass through. a. 3-inch b. 4-inch c. 6-inch d. no limitation is mandated ---------CORRECT ANSWER-----------------B In the identification of flood hazard areas, areas that have been determined to be subject to maximum wave heights of _______________ are not required to be designated coastal high-hazard areas feet unless subject to high-velocity wave action or wave-induced erosion. a. 3 b. 4 c. 5 d. 6 ---------CORRECT ANSWER-----------------A What is the maximum riser height permitted for spiral stairways? a. 7 3 /4 inches b. 8 inches c. 8 1 /4 inches d. 9 1 /2 inches ---------CORRECT ANSWER-----------------D Stairway handrail height shall be, measured vertically from the nosing of the treads, a minimum of _______________ and a maximum of _______________. a. 30 inches, 34 inches b. 30 inches, 38 inches c. 34 inches, 38 inches d. 34 inches, 42 inches ---------CORRECT ANSWER-----------------C

Which one of the following areas in a dwelling unit does not specifically require the installation of a smoke alarm? a. basement b. living room c. habitable attic d. sleeping room ---------CORRECT ANSWER-----------------B Where gypsum wallboard is used to separate foam plastic from the interior of the dwelling, the separation shall be minimum __________ gypsum board. a. 1 /2-inch b. 1 /2-inch Type X c. 5 /8-inch d. 5 /8-inch Type X ---------CORRECT ANSWER-----------------A When carbon monoxide alarms are required in new construction, they shall be installed _______________ a. within every bedroom b. on all floor levels of multistory units c. outside of each separate sleeping area d. in the garage ---------CORRECT ANSWER-----------------C An automatic residential fire sprinkler system shall be provided in all buildings containing _______________ or more townhouses. a. 3 (all townhouses require a sprinkler system) b. 8 c. 16 d. sprinkler systems are not required in townhouses ---------CORRECT ANSWER-----------------A In new construction, carbon monoxide alarms are required in dwelling units _______________.

a. where fuel-fired appliances are installed b. that have attached garages with an opening to the dwelling c. with habitable space below grade d. either a or b ---------CORRECT ANSWER-----------------D Unless they are made of pressure preservatively treated or naturally durable wood, wood framing members that rest on masonry or concrete exterior foundation walls shall be located a minimum of _______________ from exposed ground. a. 6 inches b. 8 inches c. 12 inches d. 18 inches ---------CORRECT ANSWER-----------------B In the establishment of a design flood elevation, the depth of peak elevation of flooding for a _______________ flood is used. a. 10-year b. 20-year c. 50-year d. 100-year ---------CORRECT ANSWER-----------------D Where stair risers are not vertical, they shall be sloped under the tread above at a maximum angle of _______________ from the vertical. a. 10° b. 15° c. 22° d. 30° ---------CORRECT ANSWER-----------------D Where foam plastic is spray applied to a sill plate without a thermal barrier, it shall have a maximum density of _______________ pcf. a. 1. b. 1.

Where nosings are required on a stairway with solid risers, the nosings shall extend a minimum of _______________ inch(es) and a maximum of _______________ inch(es) beyond the risers a. 1 /2, 1 b. 3 /4, 1 1 / c. 1, 1 1 / d. 1 1 /4, 2 ---------CORRECT ANSWER-----------------B Address numbers used for building identification shall have a minimum height of _______________ inches. a. 4 b. 6 c. 8 d. 9 ---------CORRECT ANSWER-----------------A Openings for required guards on the sides of stair treads shall be provided with intermediate rails or ornamental closures such that a minimum _______________ sphere cannot pass through. a. 3 1 / b. 4 c. 4 3 / d. 6 ---------CORRECT ANSWER-----------------C Where a safe room is constructed as a storm shelter in order to provide safe refuge from high winds, the room shall be constructed in accordance with _______________. a. ICC/NSSA- 500 b. CPSC 16 CFR, Part 1201 c. DOC PS 1- 07 d. FEMA TB- 2 — 93 ---------CORRECT ANSWER-----------------A

Unless grading is prohibited by physical barriers, lots shall be graded away from the foundation with a minimum fall of _______________ within the first _______________. a. 6 inches, 5 feet b. 6 inches, 10 feet c. 12 inches, 5 feet d. 12 inches, 10 feet ---------CORRECT ANSWER-----------------B In the absence of a complete geotechnical evaluation to determine the soil's characteristics, clayey silt material shall be assumed to have a presumptive load-bearing value of _______________. a. 1,500 psf b. 2,000 psf c. 3,000 psf d. 4,000 psf ---------CORRECT ANSWER-----------------A Concrete used in a basement slab shall have a minimum compressive strength of _______________ where a severe weathering potential exists. a. 2,000 psi b. 2,500 psi c. 3,000 psi d. 3,500 psi ---------CORRECT ANSWER-----------------B Air entrainment for concrete subjected to weathering, when required for locations other than garage floors with a steel troweled finish, shall have a total air content of _______________ minimum and _______________ maximum. a. 4 percent, 7 percent b. 4 percent, 8 percent c. 5 percent, 7 percent d. 5 percent, 8 percent ---------CORRECT ANSWER-----------------C

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 ---------CORRECT ANSWER-----------------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 ---------CORRECT ANSWER-----------------A The building official has the authority to _______________ the provisions of the code. A. Ignore B. Waive C. Violate D. Interpret ---------CORRECT ANSWER-----------------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 ---------CORRECT ANSWER-----------------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 ---------CORRECT ANSWER------ -----------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 ---------CORRECT ANSWER-----------------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 ---------CORRECT ANSWER-----------------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 ---------CORRECT ANSWER-----------------D Prefabricated swimming pools are subject to a building permit where they have a minimum depth of _______________. A. 12 inches B. 24 inches

D. two years ---------CORRECT ANSWER-----------------B Where applicable, which one of the following inspections is not specifically identified by the International Residential Code as a required inspection? A. Foundation inspection B. Frame inspection C. Fire-resistance-construction inspection D. Energy efficiency inspection ---------CORRECT ANSWER-----------------D Whose duty is it to provide access to work in need of inspection? A. The permit holder or agent B. The owner or owner's agent C. The contractor D. The person requesting the inspection ---------CORRECT ANSWER-------- ---------D The certificate of occupancy shall contain all of the following information except: A. The name and address of the owner or owner's agent B. The name of the building official C. The edition of the code under which the permit was issued D. The maximum occupant load ---------CORRECT ANSWER-----------------D A temporary certificate of occupancy is valid for what period of time? A. 30 days B. 60 days C. 180 days D. A period set by the building official ---------CORRECT ANSWER------------ -----D

The board of appeals is not authorized to rule on an appeal based on a claim that _________. A. The provisions of the code do not fully apply B. A code requirement should be waived C. The rules have been incorrectly interpreted D. A better form of construction is provided ---------CORRECT ANSWER---- -------------B The membership of the board of appeals _______________. A. Shall include a jurisdictional member B. Must consist of at least five members C. Shall be knowledgeable of building construction D. Must include an engineer or an architect ---------CORRECT ANSWER---- -------------C A permit is not required for construction of a fence with a maximum height of _______________feet. A. 5 B. 6 C. 7 D. 8 ---------CORRECT ANSWER-----------------C When a stop work order is issued, it shall be given to any of the following individuals except for the _______________. A. Owner B. Owner's agent C. Permit applicant D. Person doing the work ---------CORRECT ANSWER-----------------C Which of the following standards is applicable for factory-built fireplaces? A. ANSI Z21.42- 2014 B. CPSC 16 CFR Part 1404

It is the duty of the _______________ to notify the building official that work is ready for inspection. A. Permit holder or their agent B. Owner or their agent C. Contractor D. Design professional ---------CORRECT ANSWER-----------------A What is the role of the building official in relationship to the board of appeals? A. Advisor only B. Ex officio member C. Full voting member D. Procedural reviewer ---------CORRECT ANSWER-----------------B Where the enforcement of a code provision would violate the conditions of an appliance's listing, the conditions of the listing _______________. A. Are no longer valid B. May be disregarded C. Shall apply D. Are optional ---------CORRECT ANSWER-----------------C Inspection reports shall be retained in the official records for what minimum period? A. Until after the certificate of occupancy is issued B. 180 days after the report is issued C. The time required for the retention of public records D. 180 days after the certificate of occupancy is issued ---------CORRECT ANSWER-----------------C

Which of the following reasons is not specifically identified by the code as authority to suspend or revoke a permit? A. the permit was issued in error B. required inspections have not been performed C. it was issued in violation of a jurisdictional ordinance D. inaccurate information was provided at the time of issuance --------- CORRECT ANSWER-----------------B A permit for a temporary structure is limited as to time of service, but shall not be allowed for more than _______________ days. A. 30 B. 60 C. 90 D. 180 ---------CORRECT ANSWER-----------------D The issuance of a certificate of occupancy is not required for what maximum size of accessory building? A. 120 square feet B. 150 square feet C. 180 square feet D. all accessory buildings are exempt ---------CORRECT ANSWER----------- ------D What is the weathering probability for all dwelling sites located in the state of South Dakota? a. severe b. moderate c. negligible d. none ---------CORRECT ANSWER-----------------A The ultimate design wind speed to be used for a majority of the United States is _______________.

maximum of _______________ on center to fasten those panels that span 8 feet. a. 8 inches b. 9 inches c. 12 inches d. 16 inches ---------CORRECT ANSWER-----------------A Where a referenced document is based upon nominal design wind speeds and no conversion between ultimate design wind speeds and nominal design wind speeds is provided, an ultimate design wind speed of 115 mph shall be converted to a nominal design wind speed of __________ mph. a. 85 b. 89 c. 93 d. 101 ---------CORRECT ANSWER-----------------B What wind exposure category is appropriate for a dwelling located in a residential development in a suburban area? a. Exposure A b. Exposure B c. Exposure C d. Exposure D ---------CORRECT ANSWER-----------------B The seismic design category for a site having a calculated SDS of 0.63g is _______________. a. B b. D c. D d. E ---------CORRECT ANSWER-----------------B Habitable attics shall be designed with a minimum uniformly distributed live load of _______________ psf.

a. 10 b. 20 c. 30 d. 40 ---------CORRECT ANSWER-----------------C For a dwelling assigned to Seismic Design Category D2 and constructed under the conventional provisions of the IRC, what is the maximum dead load permitted for 8- inch-thick masonry walls? a. 40 psf b. 65 psf c. 80 psf d. 85 psf ---------CORRECT ANSWER-----------------C A portion of a building is considered irregular for seismic purposes when a floor opening, such as for a stairway, exceeds the lesser of 12 feet or _______________ of the least floor dimension. a. 15 percent b. 25 percent c. 33 1 /3 percent d. 50 percent ---------CORRECT ANSWER-----------------D Buildings constructed in regions where the ground snow load exceeds a minimum of _______________ must be designed in accordance with accepted engineering practice. a. 30 psf b. 50 psf c. 70 psf d. 90 psf ---------CORRECT ANSWER-----------------C For rooms other than sleeping rooms, what is the minimum uniformly distributed live load that is to be used for the design of the floor system? a. 20 psf