Nevada C-3 Carpentry Contractor
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. Which of the following is the primary purpose of a header in wall
framing?
A. To support the roof
B. To provide a nailing surface for drywall
C. To transfer loads over openings such as doors and windows
D. To act as a base for flooring
Rationale: Headers are structural members that transfer loads around
openings to the supporting studs.
2. What is the minimum slope required for a wood shingle roof in
Nevada?
A. 1/2:12
B. 2:12
C. 3:12
D. 4:12
Rationale: Building codes typically require wood shingle roofs to have a
minimum slope of 3:12 to ensure proper water runoff.
3. When installing a stairway, what is the maximum riser height allowed
by most building codes?
A. 6 inches
B. 7 1/2 inches
C. 8 inches
D. 7 3/4 inches
,Rationale: The IRC and Nevada codes set the maximum riser height at 7
3/4 inches to ensure safety and uniformity.
4. What is the typical spacing for 2x4 wall studs in residential
construction?
A. 12 inches on center
B. 16 inches on center
C. 16 or 24 inches on center depending on code and load
requirements
D. 32 inches on center
Rationale: Standard practice is 16 inches on center, though 24 inches is
allowed in non-load bearing walls or with proper design.
5. Which of the following nails is best for exterior wood construction?
A. Plain steel
B. Galvanized or stainless steel
C. Aluminum
D. Brass
Rationale: Galvanized or stainless steel nails resist corrosion from weather
exposure, extending the life of the construction.
6. What is the main purpose of fireblocking in wood frame construction?
A. To support insulation
B. To increase wall strength
C. To prevent the vertical spread of fire inside wall cavities
D. To secure drywall
Rationale: Fireblocking fills spaces between studs, slowing the spread of
fire through concealed cavities.
7. When cutting lumber with a circular saw, the blade should extend how
far below the wood?
A. 1/4 inch
B. 1/2 inch
C. 1/8 to 1/4 inch below the wood
D. The same thickness as the wood
, Rationale: Cutting with the blade slightly below the material ensures a
clean cut while reducing kickback risk.
8. What type of joint is commonly used at the corner of a cabinet?
A. Lap joint
B. Dado or rabbet joint
C. Butt joint only
D. Mortise and tenon
Rationale: Dado and rabbet joints provide strength and alignment for
cabinet corners.
9. Which of the following is required when constructing a deck attached
to a house?
A. Floating ledger
B. Ledger securely fastened to house framing with flashing to prevent
water intrusion
C. Post anchored directly into soil only
D. Railings are optional
Rationale: Proper attachment of the ledger prevents deck collapse and
flashing prevents water damage to the house.
10. In wood frame construction, what is the purpose of a sill plate?
A. To support the roof
B. To anchor the wall to the foundation
C. To act as insulation
D. To frame doors
Rationale: Sill plates transfer wall loads to the foundation and provide a
secure base.
11. Which fastener is best suited for connecting dimensional lumber
to concrete?
A. Common nail
B. Wood screw
C. Anchor bolt or concrete screw
D. Roofing nail
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. Which of the following is the primary purpose of a header in wall
framing?
A. To support the roof
B. To provide a nailing surface for drywall
C. To transfer loads over openings such as doors and windows
D. To act as a base for flooring
Rationale: Headers are structural members that transfer loads around
openings to the supporting studs.
2. What is the minimum slope required for a wood shingle roof in
Nevada?
A. 1/2:12
B. 2:12
C. 3:12
D. 4:12
Rationale: Building codes typically require wood shingle roofs to have a
minimum slope of 3:12 to ensure proper water runoff.
3. When installing a stairway, what is the maximum riser height allowed
by most building codes?
A. 6 inches
B. 7 1/2 inches
C. 8 inches
D. 7 3/4 inches
,Rationale: The IRC and Nevada codes set the maximum riser height at 7
3/4 inches to ensure safety and uniformity.
4. What is the typical spacing for 2x4 wall studs in residential
construction?
A. 12 inches on center
B. 16 inches on center
C. 16 or 24 inches on center depending on code and load
requirements
D. 32 inches on center
Rationale: Standard practice is 16 inches on center, though 24 inches is
allowed in non-load bearing walls or with proper design.
5. Which of the following nails is best for exterior wood construction?
A. Plain steel
B. Galvanized or stainless steel
C. Aluminum
D. Brass
Rationale: Galvanized or stainless steel nails resist corrosion from weather
exposure, extending the life of the construction.
6. What is the main purpose of fireblocking in wood frame construction?
A. To support insulation
B. To increase wall strength
C. To prevent the vertical spread of fire inside wall cavities
D. To secure drywall
Rationale: Fireblocking fills spaces between studs, slowing the spread of
fire through concealed cavities.
7. When cutting lumber with a circular saw, the blade should extend how
far below the wood?
A. 1/4 inch
B. 1/2 inch
C. 1/8 to 1/4 inch below the wood
D. The same thickness as the wood
, Rationale: Cutting with the blade slightly below the material ensures a
clean cut while reducing kickback risk.
8. What type of joint is commonly used at the corner of a cabinet?
A. Lap joint
B. Dado or rabbet joint
C. Butt joint only
D. Mortise and tenon
Rationale: Dado and rabbet joints provide strength and alignment for
cabinet corners.
9. Which of the following is required when constructing a deck attached
to a house?
A. Floating ledger
B. Ledger securely fastened to house framing with flashing to prevent
water intrusion
C. Post anchored directly into soil only
D. Railings are optional
Rationale: Proper attachment of the ledger prevents deck collapse and
flashing prevents water damage to the house.
10. In wood frame construction, what is the purpose of a sill plate?
A. To support the roof
B. To anchor the wall to the foundation
C. To act as insulation
D. To frame doors
Rationale: Sill plates transfer wall loads to the foundation and provide a
secure base.
11. Which fastener is best suited for connecting dimensional lumber
to concrete?
A. Common nail
B. Wood screw
C. Anchor bolt or concrete screw
D. Roofing nail
