New Jersey Construction Code Official
Residential Examination Practice Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. Which code is primarily enforced for one- and two-family
dwellings in New Jersey?
A. International Building Code (IBC)
B. International Residential Code (IRC)
C. International Existing Building Code (IEBC)
D. International Fire Code (IFC)
Answer: B
The IRC governs one- and two-family dwellings and townhouses
and is adopted by New Jersey for residential construction.
2. Which agency administers the Uniform Construction Code (UCC)
in New Jersey?
A. Department of Community Affairs
B. Department of Labor
C. Department of Environmental Protection
D. Board of Public Utilities
Answer: A
The New Jersey Department of Community Affairs (DCA) is
responsible for administering the UCC.
3. What is the minimum ceiling height for habitable rooms under the
IRC?
, A. 6 feet 4 inches
B. 7 feet
C. 7 feet 6 inches
D. 8 feet
Answer: B
Habitable rooms must have a minimum ceiling height of 7 feet,
with limited exceptions.
4. Which occupancy classification applies to a detached single-family
dwelling?
A. Group R-1
B. Group R-2
C. Group R-3
D. Group U
Answer: C
Detached one- and two-family dwellings are classified as Group R-
3.
5. What is the minimum required width of a residential stairway
above the handrail height?
A. 30 inches
B. 34 inches
C. 36 inches
D. 42 inches
Answer: C
Residential stairways must be at least 36 inches wide above the
handrail.
6. The maximum riser height permitted for residential stairs is:
A. 7 inches
, B. 7¾ inches
C. 8 inches
D. 8¼ inches
Answer: B
The IRC limits stair riser height to a maximum of 7¾ inches.
7. What is the minimum tread depth for residential stairways?
A. 9 inches
B. 9½ inches
C. 10 inches
D. 11 inches
Answer: C
The IRC requires a minimum tread depth of 10 inches.
8. Where is a smoke alarm required in a single-family dwelling?
A. Only in bedrooms
B. Only outside sleeping areas
C. On every level and in sleeping areas
D. Only in basements
Answer: C
Smoke alarms are required on every story, inside sleeping areas,
and outside sleeping areas.
9. Carbon monoxide alarms are required when a dwelling contains:
A. Any electrical appliance
B. Fuel-burning appliances or attached garages
C. A fireplace only
D. A basement
Answer: B
, CO alarms are required when fuel-burning appliances or attached
garages are present.
10. What is the minimum required emergency escape and
rescue opening height?
A. 20 inches
B. 22 inches
C. 24 inches
D. 30 inches
Answer: C
Emergency escape openings must have a minimum opening height
of 24 inches.
11. The minimum net clear opening area for an emergency
escape window is:
A. 4.0 square feet
B. 4.5 square feet
C. 5.0 square feet
D. 5.7 square feet
Answer: D
Most emergency escape windows require a minimum net clear
opening of 5.7 square feet.
12. What is the maximum height above the floor for the sill of an
emergency escape window?
A. 36 inches
B. 40 inches
C. 44 inches
D. 48 inches
Residential Examination Practice Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which code is primarily enforced for one- and two-family
dwellings in New Jersey?
A. International Building Code (IBC)
B. International Residential Code (IRC)
C. International Existing Building Code (IEBC)
D. International Fire Code (IFC)
Answer: B
The IRC governs one- and two-family dwellings and townhouses
and is adopted by New Jersey for residential construction.
2. Which agency administers the Uniform Construction Code (UCC)
in New Jersey?
A. Department of Community Affairs
B. Department of Labor
C. Department of Environmental Protection
D. Board of Public Utilities
Answer: A
The New Jersey Department of Community Affairs (DCA) is
responsible for administering the UCC.
3. What is the minimum ceiling height for habitable rooms under the
IRC?
, A. 6 feet 4 inches
B. 7 feet
C. 7 feet 6 inches
D. 8 feet
Answer: B
Habitable rooms must have a minimum ceiling height of 7 feet,
with limited exceptions.
4. Which occupancy classification applies to a detached single-family
dwelling?
A. Group R-1
B. Group R-2
C. Group R-3
D. Group U
Answer: C
Detached one- and two-family dwellings are classified as Group R-
3.
5. What is the minimum required width of a residential stairway
above the handrail height?
A. 30 inches
B. 34 inches
C. 36 inches
D. 42 inches
Answer: C
Residential stairways must be at least 36 inches wide above the
handrail.
6. The maximum riser height permitted for residential stairs is:
A. 7 inches
, B. 7¾ inches
C. 8 inches
D. 8¼ inches
Answer: B
The IRC limits stair riser height to a maximum of 7¾ inches.
7. What is the minimum tread depth for residential stairways?
A. 9 inches
B. 9½ inches
C. 10 inches
D. 11 inches
Answer: C
The IRC requires a minimum tread depth of 10 inches.
8. Where is a smoke alarm required in a single-family dwelling?
A. Only in bedrooms
B. Only outside sleeping areas
C. On every level and in sleeping areas
D. Only in basements
Answer: C
Smoke alarms are required on every story, inside sleeping areas,
and outside sleeping areas.
9. Carbon monoxide alarms are required when a dwelling contains:
A. Any electrical appliance
B. Fuel-burning appliances or attached garages
C. A fireplace only
D. A basement
Answer: B
, CO alarms are required when fuel-burning appliances or attached
garages are present.
10. What is the minimum required emergency escape and
rescue opening height?
A. 20 inches
B. 22 inches
C. 24 inches
D. 30 inches
Answer: C
Emergency escape openings must have a minimum opening height
of 24 inches.
11. The minimum net clear opening area for an emergency
escape window is:
A. 4.0 square feet
B. 4.5 square feet
C. 5.0 square feet
D. 5.7 square feet
Answer: D
Most emergency escape windows require a minimum net clear
opening of 5.7 square feet.
12. What is the maximum height above the floor for the sill of an
emergency escape window?
A. 36 inches
B. 40 inches
C. 44 inches
D. 48 inches
