Class B-2 Exam Practice Questions And

Arizona General Residential Contractor (Class B-2) Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a building permit?
• To provide tax information
• To ensure compliance with zoning and building codes
• To allow contractors to charge more
• To reduce construction costs

Answer: B. To ensure compliance with zoning and building codes

Rationale: Building permits ensure that construction meets local safety,

structural, and zoning regulations, protecting public safety and property value. 1 / 4

• When is a contractor required to provide a written contract in Arizona

for a home improvement project?

• Only if requested by the homeowner
• For projects over $1,000
• For projects over $500
• For all projects regardless of cost

Answer: C. For projects over $500

Rationale: Arizona law requires written contracts for home improvement

projects exceeding $500 to clarify scope, cost, and responsibilities.

• Which soil type is most prone to shifting and requires special foundation

design?

• Sand
• Clay
• Gravel
• Loam

Answer: B. Clay

Rationale: Clay soils expand and contract significantly with moisture

changes, which can cause foundation movement if not properly addressed.

• What is the minimum slope required for a residential roof to ensure

water runoff?

A. 1/2:12

B. 2:12 2 / 4

C. 4:12

D. 6:12

Answer: B. 2:12 Rationale: A 2:12 slope allows for adequate water runoff in most roofing materials, though some materials require steeper slopes.

• What is the purpose of flashing in residential construction?
• To provide decorative trim
• To prevent water intrusion at roof and wall intersections
• To insulate the roof
• To support structural beams

Answer: B. To prevent water intrusion at roof and wall intersections

Rationale: Flashing directs water away from vulnerable areas like chimneys,

skylights, and roof valleys, preventing leaks and water damage.

• In Arizona, what is the maximum retention amount a homeowner may

withhold from a contractor?

• 5%

B. 10%

C. 15%

D. 20%

Answer: B. 10%

Rationale: State regulations allow homeowners to retain up to 10% of the 3 / 4

contract price until satisfactory completion to protect against incomplete work.

• What is the typical spacing for wood studs in residential framing?
• 12 inches on center
• 16 inches on center
• 18 inches on center
• 24 inches on center

Answer: B. 16 inches on center

Rationale: 16-inch spacing provides optimal structural support and

compatibility with standard sheathing and drywall sizes.

• Which fire rating is required for interior garage walls adjacent to living

space in Arizona?

• 15 minutes
• 30 minutes
• 45 minutes
• 1 hour

Answer: B. 30 minutes

Rationale: A 30-minute fire-rated barrier helps prevent fire spread from the

garage to living areas, as required by building codes.

• What is the primary purpose of vapor barriers in construction?
• To provide insulation
• To prevent moisture penetration into walls and floors
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