Arizona AZ C-7 Carpentry
Contractor Practice Exam |
Questions, Verified Answers &
Detailed Rationales |
Complete Contractor License
Exam Prep Study Guide |
Updated 2026
1. What is the primary purpose of a sill plate in wood-
frame construction?
A. To support the roof sheathing
B. To connect the wall framing to the foundation
C. To support ceiling joists
D. To provide exterior siding support
Correct Answer: To connect the wall framing to the
foundation
Rationale: The sill plate transfers wall loads to the
foundation and provides the base connection for the
wall framing.
2. Which type of wood is generally classified as a
structural softwood?
A. Oak
B. Maple
C. Douglas fir
D. Hickory
Correct Answer: Douglas fir
,Rationale: Douglas fir is a commonly used structural
softwood for framing members because of its strength
and availability.
3. What is the actual dressed size of a nominal 2 × 4
commonly used in modern framing?
A. 2 inches × 4 inches
B. 1½ inches × 3½ inches
C. 1¼ inches × 3¼ inches
D. 1¾ inches × 3¾ inches
Correct Answer: 1½ inches × 3½ inches
Rationale: Standard surfaced-dry framing lumber sold
as 2 × 4 is typically 1½ inches by 3½ inches actual size.
4. What is the purpose of a header over a window or
door opening?
A. To prevent termites
B. To carry loads around the opening
C. To provide insulation
D. To support the foundation
Correct Answer: To carry loads around the opening
Rationale: A header transfers loads from above the
opening to the supporting studs on each side.
5. Which framing member is commonly installed
vertically in a wood-framed wall?
A. Rafter
B. Joist
C. Stud
D. Ridge board
Correct Answer: Stud
,Rationale: Studs are vertical wall-framing members that
transfer loads between the top and bottom plates.
6. What is the main purpose of a cripple stud?
A. To support a foundation wall
B. To fill framing spaces above or below openings
C. To support a ridge beam
D. To replace a sill plate
Correct Answer: To fill framing spaces above or below
openings
Rationale: Cripple studs are short studs installed above
headers or below window sills where full-height studs
cannot be used.
7. What is the purpose of a king stud at a door or
window opening?
A. To support the roof ridge
B. To provide full-height framing alongside the opening
C. To support the floor joists
D. To serve as a temporary brace
Correct Answer: To provide full-height framing alongside
the opening
Rationale: King studs run continuously from the bottom
plate to the top plate and help support the header
assembly.
8. What is the primary purpose of a jack stud?
A. To support the header
B. To support roof sheathing
C. To brace floor joists
D. To support siding
, Correct Answer: To support the header
Rationale: Jack studs are cut to support the ends of
headers at framed openings.
9. What does “16 inches on center” mean?
A. Sixteen inches between the edges of studs
B. Sixteen inches from the center of one framing member to
the center of the next
C. Sixteen inches of actual lumber length
D. Sixteen inches between wall surfaces
Correct Answer: Sixteen inches from the center of one
framing member to the center of the next
Rationale: On-center spacing is measured from the
centerline of one framing member to the centerline of
the adjacent member.
10. What is the purpose of blocking between floor
joists?
A. To replace the foundation
B. To provide lateral stability and transfer loads where required
C. To eliminate the need for subflooring
D. To increase ceiling height
Correct Answer: To provide lateral stability and transfer
loads where required
Rationale: Blocking can prevent joist rotation, improve
stability, and provide structural support or load transfer
depending on its location and design.
11. Which tool is most appropriate for checking whether
a wall is plumb?
Contractor Practice Exam |
Questions, Verified Answers &
Detailed Rationales |
Complete Contractor License
Exam Prep Study Guide |
Updated 2026
1. What is the primary purpose of a sill plate in wood-
frame construction?
A. To support the roof sheathing
B. To connect the wall framing to the foundation
C. To support ceiling joists
D. To provide exterior siding support
Correct Answer: To connect the wall framing to the
foundation
Rationale: The sill plate transfers wall loads to the
foundation and provides the base connection for the
wall framing.
2. Which type of wood is generally classified as a
structural softwood?
A. Oak
B. Maple
C. Douglas fir
D. Hickory
Correct Answer: Douglas fir
,Rationale: Douglas fir is a commonly used structural
softwood for framing members because of its strength
and availability.
3. What is the actual dressed size of a nominal 2 × 4
commonly used in modern framing?
A. 2 inches × 4 inches
B. 1½ inches × 3½ inches
C. 1¼ inches × 3¼ inches
D. 1¾ inches × 3¾ inches
Correct Answer: 1½ inches × 3½ inches
Rationale: Standard surfaced-dry framing lumber sold
as 2 × 4 is typically 1½ inches by 3½ inches actual size.
4. What is the purpose of a header over a window or
door opening?
A. To prevent termites
B. To carry loads around the opening
C. To provide insulation
D. To support the foundation
Correct Answer: To carry loads around the opening
Rationale: A header transfers loads from above the
opening to the supporting studs on each side.
5. Which framing member is commonly installed
vertically in a wood-framed wall?
A. Rafter
B. Joist
C. Stud
D. Ridge board
Correct Answer: Stud
,Rationale: Studs are vertical wall-framing members that
transfer loads between the top and bottom plates.
6. What is the main purpose of a cripple stud?
A. To support a foundation wall
B. To fill framing spaces above or below openings
C. To support a ridge beam
D. To replace a sill plate
Correct Answer: To fill framing spaces above or below
openings
Rationale: Cripple studs are short studs installed above
headers or below window sills where full-height studs
cannot be used.
7. What is the purpose of a king stud at a door or
window opening?
A. To support the roof ridge
B. To provide full-height framing alongside the opening
C. To support the floor joists
D. To serve as a temporary brace
Correct Answer: To provide full-height framing alongside
the opening
Rationale: King studs run continuously from the bottom
plate to the top plate and help support the header
assembly.
8. What is the primary purpose of a jack stud?
A. To support the header
B. To support roof sheathing
C. To brace floor joists
D. To support siding
, Correct Answer: To support the header
Rationale: Jack studs are cut to support the ends of
headers at framed openings.
9. What does “16 inches on center” mean?
A. Sixteen inches between the edges of studs
B. Sixteen inches from the center of one framing member to
the center of the next
C. Sixteen inches of actual lumber length
D. Sixteen inches between wall surfaces
Correct Answer: Sixteen inches from the center of one
framing member to the center of the next
Rationale: On-center spacing is measured from the
centerline of one framing member to the centerline of
the adjacent member.
10. What is the purpose of blocking between floor
joists?
A. To replace the foundation
B. To provide lateral stability and transfer loads where required
C. To eliminate the need for subflooring
D. To increase ceiling height
Correct Answer: To provide lateral stability and transfer
loads where required
Rationale: Blocking can prevent joist rotation, improve
stability, and provide structural support or load transfer
depending on its location and design.
11. Which tool is most appropriate for checking whether
a wall is plumb?
