AZ ROC TRADE EXAM B-3 LICENSE. EXAM –QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026
Q&A | INSTANT DOWNLOAD PDF.
*CORE DOMAINS*
*Arizona Registrar of Contractors Rules*
*Carpentry and Structural Framing*
*Masonry and Concrete Systems*
*Roofing Systems and Installation*
*Finishes and Interior Reconstruction*
*Project Management and Estimating*
*Safety and OSHA Standards (CFR 1926)*
*Blueprint Reading and Specifications*
*INTRODUCTION*
*This comprehensive assessment is designed to evaluate the technical proficiency and regulatory knowledge required for the Arizona ROC
SECTION ONE: QUESTIONS 1–100
1. According to the Arizona Registrar of Contractors, what is the maximum dollar amount for a single project including labor and materials that a
B-3 contractor can perform on a residential property?
A. $2,500
B. $5,000
C. $10,000
D. No limit for B-3 within scope
🟢 Correct answer D. No limit for B-3 within scope
🔴 RATIONALE: While some specialty licenses have monetary limits (like the Handyman exception), the B-3 General Remodeling license is limited
by the scope of work (remodeling and repair) rather than a specific dollar cap per project.
2. When installing a floor joist, what is the maximum allowed notch depth at the end of the joist?
,A. 1/4 of the joist depth
B. 1/3 of the joist depth
C. 1/6 of the joist depth
D. 1/2 of the joist depth
🟢 Correct answer A. 1/4 of the joist depth
🔴 RATIONALE: Per standard building codes (IRC), notches at the ends of members shall not exceed one-fourth the depth of the member to
maintain structural integrity at the bearing point.
3. A contractor is remodeling a bathroom and discovers mold behind the drywall. What is the most ethical and professional first step?
A. Spray with bleach and cover with new drywall
B. Immediately stop work and notify the homeowner
C. Continue work but increase ventilation
D. Apply a primer over the mold to seal it
🟢 Correct answer B. Immediately stop work and notify the homeowner
🔴 RATIONALE: Professional standards require immediate disclosure of latent defects or hazardous conditions to the client before proceeding with
remediation or concealment.
4. Which of the following is a requirement for a ladder used to access a roof during a renovation project?
A. It must be made of fiberglass
B. It must extend at least 1 foot above the roof edge
C. It must extend at least 3 feet above the roof edge
D. It must be tied off at the midpoint
🟢 Correct answer C. It must extend at least 3 feet above the roof edge
🔴 RATIONALE: OSHA 1926.1053 requires that when portable ladders are used for access to an upper landing surface, the side rails shall extend
at least 3 feet (.9 m) above the landing surface.
5. What is the standard thickness of a residential interior door?
A. 1 1/4 inches
B. 1 3/8 inches
C. 1 3/4 inches
D. 2 inches
🟢 Correct answer B. 1 3/8 inches
🔴 RATIONALE: 1 3/8 inches is the industry standard for interior residential doors, whereas 1 3/4 inches is standard for exterior doors.
6. In concrete work, what does "slump" measure?
, A. The tensile strength of the mix
B. The consistency and workability of the wet concrete
C. The curing time required for footings
D. The amount of air entrained in the mix
🟢 Correct answer B. The consistency and workability of the wet concrete
🔴 RATIONALE: A slump test measures the vertical displacement of concrete after a cone is removed; it is a primary indicator of the water-to-
cement ratio and workability.
7. Which type of drywall is specifically designed for use in high-moisture areas like bathrooms?
A. Type X
B. Greenboard (MR)
C. Sound-rated board
D. Standard 1/2 inch board
🟢 Correct answer B. Greenboard (MR)
🔴 RATIONALE: Greenboard is moisture-resistant (MR) drywall specifically treated to withstand humidity, though it is not recommended for direct
water contact areas like shower stalls (where cement board is preferred).
8. How many days does a contractor have to report a change of business address to the Arizona Registrar of Contractors?
A. 10 days
B. 30 days
C. 60 days
D. 90 days
🟢 Correct answer B. 30 days
🔴 RATIONALE: Arizona administrative code requires licensees to notify the ROC within 30 days of any change in business address or contact
information.
9. A B-3 contractor is installing a new window header. The span is 6 feet in a load-bearing wall. What is the standard minimum bearing surface
required at each end?
A. 1 inch
B. 1 1/2 inches
C. 3 inches
D. 4 inches
🟢 Correct answer B. 1 1/2 inches
🔴 RATIONALE: The IRC generally requires a minimum of 1 1/2 inches of bearing for wood beams and headers on wood or metal studs.
Q&A | INSTANT DOWNLOAD PDF.
*CORE DOMAINS*
*Arizona Registrar of Contractors Rules*
*Carpentry and Structural Framing*
*Masonry and Concrete Systems*
*Roofing Systems and Installation*
*Finishes and Interior Reconstruction*
*Project Management and Estimating*
*Safety and OSHA Standards (CFR 1926)*
*Blueprint Reading and Specifications*
*INTRODUCTION*
*This comprehensive assessment is designed to evaluate the technical proficiency and regulatory knowledge required for the Arizona ROC
SECTION ONE: QUESTIONS 1–100
1. According to the Arizona Registrar of Contractors, what is the maximum dollar amount for a single project including labor and materials that a
B-3 contractor can perform on a residential property?
A. $2,500
B. $5,000
C. $10,000
D. No limit for B-3 within scope
🟢 Correct answer D. No limit for B-3 within scope
🔴 RATIONALE: While some specialty licenses have monetary limits (like the Handyman exception), the B-3 General Remodeling license is limited
by the scope of work (remodeling and repair) rather than a specific dollar cap per project.
2. When installing a floor joist, what is the maximum allowed notch depth at the end of the joist?
,A. 1/4 of the joist depth
B. 1/3 of the joist depth
C. 1/6 of the joist depth
D. 1/2 of the joist depth
🟢 Correct answer A. 1/4 of the joist depth
🔴 RATIONALE: Per standard building codes (IRC), notches at the ends of members shall not exceed one-fourth the depth of the member to
maintain structural integrity at the bearing point.
3. A contractor is remodeling a bathroom and discovers mold behind the drywall. What is the most ethical and professional first step?
A. Spray with bleach and cover with new drywall
B. Immediately stop work and notify the homeowner
C. Continue work but increase ventilation
D. Apply a primer over the mold to seal it
🟢 Correct answer B. Immediately stop work and notify the homeowner
🔴 RATIONALE: Professional standards require immediate disclosure of latent defects or hazardous conditions to the client before proceeding with
remediation or concealment.
4. Which of the following is a requirement for a ladder used to access a roof during a renovation project?
A. It must be made of fiberglass
B. It must extend at least 1 foot above the roof edge
C. It must extend at least 3 feet above the roof edge
D. It must be tied off at the midpoint
🟢 Correct answer C. It must extend at least 3 feet above the roof edge
🔴 RATIONALE: OSHA 1926.1053 requires that when portable ladders are used for access to an upper landing surface, the side rails shall extend
at least 3 feet (.9 m) above the landing surface.
5. What is the standard thickness of a residential interior door?
A. 1 1/4 inches
B. 1 3/8 inches
C. 1 3/4 inches
D. 2 inches
🟢 Correct answer B. 1 3/8 inches
🔴 RATIONALE: 1 3/8 inches is the industry standard for interior residential doors, whereas 1 3/4 inches is standard for exterior doors.
6. In concrete work, what does "slump" measure?
, A. The tensile strength of the mix
B. The consistency and workability of the wet concrete
C. The curing time required for footings
D. The amount of air entrained in the mix
🟢 Correct answer B. The consistency and workability of the wet concrete
🔴 RATIONALE: A slump test measures the vertical displacement of concrete after a cone is removed; it is a primary indicator of the water-to-
cement ratio and workability.
7. Which type of drywall is specifically designed for use in high-moisture areas like bathrooms?
A. Type X
B. Greenboard (MR)
C. Sound-rated board
D. Standard 1/2 inch board
🟢 Correct answer B. Greenboard (MR)
🔴 RATIONALE: Greenboard is moisture-resistant (MR) drywall specifically treated to withstand humidity, though it is not recommended for direct
water contact areas like shower stalls (where cement board is preferred).
8. How many days does a contractor have to report a change of business address to the Arizona Registrar of Contractors?
A. 10 days
B. 30 days
C. 60 days
D. 90 days
🟢 Correct answer B. 30 days
🔴 RATIONALE: Arizona administrative code requires licensees to notify the ROC within 30 days of any change in business address or contact
information.
9. A B-3 contractor is installing a new window header. The span is 6 feet in a load-bearing wall. What is the standard minimum bearing surface
required at each end?
A. 1 inch
B. 1 1/2 inches
C. 3 inches
D. 4 inches
🟢 Correct answer B. 1 1/2 inches
🔴 RATIONALE: The IRC generally requires a minimum of 1 1/2 inches of bearing for wood beams and headers on wood or metal studs.
