Minnesota Residential Building Contractor
Exam –Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the minimum ceiling height required for habitable rooms
under Minnesota Residential Code?
a. 6 feet 8 inches
b. 7 feet 0 inches
c. 7 feet 6 inches
d. 8 feet 0 inches
The Minnesota Residential Code requires habitable rooms to have
a minimum ceiling height of 7 feet 6 inches.
2. When constructing a wood-framed floor, joists should be spaced
no more than:
a. 12 inches on center
b. 16 inches on center
c. 24 inches on center
d. 36 inches on center
Standard residential floor framing typically uses 16-inch spacing to
ensure structural integrity and support.
3. Which type of insulation is required in exterior walls for energy
efficiency in Minnesota?
, a. Fiberglass only
b. Cellulose only
c. Any insulation meeting R-value requirements
d. None
The code specifies insulation must meet minimum R-values, but
does not mandate a specific type.
4. The purpose of a vapor barrier in a residential wall assembly is to:
a. Increase wall strength
b. Prevent moisture from entering the wall cavity
c. Reduce thermal bridging
d. Improve fire resistance
Vapor barriers prevent condensation and moisture damage inside
walls.
5. A GFCI (Ground Fault Circuit Interrupter) is required:
a. Only in bedrooms
b. In bathrooms, kitchens, and exterior outlets
c. Only in garages
d. Only in basements
GFCI protection is required in areas where water and electricity
may contact to prevent shocks.
6. What is the minimum width for a residential hallway?
a. 30 inches
b. 36 inches
c. 42 inches
d. 48 inches
The Minnesota code requires hallways to be at least 36 inches
wide for accessibility and safety.
, 7. Which of the following is NOT considered a habitable room?
a. Bedroom
b. Living room
c. Kitchen
d. Bathroom
Bathrooms are not classified as habitable rooms under the
residential code.
8. What is the maximum spacing for roof rafters in a typical
residential structure?
a. 12 inches
b. 16 inches
c. 24 inches
d. 32 inches
Residential roof rafters are usually spaced 24 inches on center
unless otherwise specified.
9. A crawl space must have a minimum height of:
a. 18 inches
b. 24 inches
c. 30 inches
d. 36 inches
The Minnesota code requires crawl spaces to have at least 30
inches of clear height.
10. The minimum slope for a residential roof with asphalt
shingles is:
a. 1:12
b. 2:12
c. 3:12
Exam –Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the minimum ceiling height required for habitable rooms
under Minnesota Residential Code?
a. 6 feet 8 inches
b. 7 feet 0 inches
c. 7 feet 6 inches
d. 8 feet 0 inches
The Minnesota Residential Code requires habitable rooms to have
a minimum ceiling height of 7 feet 6 inches.
2. When constructing a wood-framed floor, joists should be spaced
no more than:
a. 12 inches on center
b. 16 inches on center
c. 24 inches on center
d. 36 inches on center
Standard residential floor framing typically uses 16-inch spacing to
ensure structural integrity and support.
3. Which type of insulation is required in exterior walls for energy
efficiency in Minnesota?
, a. Fiberglass only
b. Cellulose only
c. Any insulation meeting R-value requirements
d. None
The code specifies insulation must meet minimum R-values, but
does not mandate a specific type.
4. The purpose of a vapor barrier in a residential wall assembly is to:
a. Increase wall strength
b. Prevent moisture from entering the wall cavity
c. Reduce thermal bridging
d. Improve fire resistance
Vapor barriers prevent condensation and moisture damage inside
walls.
5. A GFCI (Ground Fault Circuit Interrupter) is required:
a. Only in bedrooms
b. In bathrooms, kitchens, and exterior outlets
c. Only in garages
d. Only in basements
GFCI protection is required in areas where water and electricity
may contact to prevent shocks.
6. What is the minimum width for a residential hallway?
a. 30 inches
b. 36 inches
c. 42 inches
d. 48 inches
The Minnesota code requires hallways to be at least 36 inches
wide for accessibility and safety.
, 7. Which of the following is NOT considered a habitable room?
a. Bedroom
b. Living room
c. Kitchen
d. Bathroom
Bathrooms are not classified as habitable rooms under the
residential code.
8. What is the maximum spacing for roof rafters in a typical
residential structure?
a. 12 inches
b. 16 inches
c. 24 inches
d. 32 inches
Residential roof rafters are usually spaced 24 inches on center
unless otherwise specified.
9. A crawl space must have a minimum height of:
a. 18 inches
b. 24 inches
c. 30 inches
d. 36 inches
The Minnesota code requires crawl spaces to have at least 30
inches of clear height.
10. The minimum slope for a residential roof with asphalt
shingles is:
a. 1:12
b. 2:12
c. 3:12
