NASCLA ACCREDITED CONTRACTOR EXAM MOCK TEST
100 QUESTIONS AND CORRECT DETAILED ANSWERS FOR
GUARANTEED SUCCESS / NEWEST 2025/2026 GRADED
A+||BRAND NEW VERSION!!
1. What is the minimum number of feet of clear working space required in
front of an electrical panel?
A. 24 inches
B. 30 inches
C. 36 inches
D. 42 inches
Explanation: The NEC requires a minimum of 36 inches of clear working
space in front of electrical panels to allow safe access for maintenance and
operation.
2. Which type of insurance is required by law for contractors in most states?
A. Property insurance
B. Workers’ compensation insurance
C. Liability insurance
D. Equipment insurance
Explanation: Liability insurance protects both the contractor and clients
against property damage or injuries caused by the contractor’s work.
3. What is the primary purpose of a building permit?
A. To collect fees
B. To inspect structural integrity
C. To ensure compliance with building codes
D. To schedule construction timelines
Explanation: Building permits verify that construction plans meet local and
state building codes for safety and compliance.
,4. When is a contractor required to provide a written contract?
A. For any project
B. Only for residential projects under $500
C. When the project exceeds the state-mandated threshold
D. Only when the client requests it
Explanation: Most states require a written contract for projects above a
certain monetary threshold to protect both parties.
5. According to OSHA, fall protection is required when workers are exposed to
heights of:
A. 4 feet
B. 6 feet
C. 10 feet
D. 12 feet
Explanation: OSHA mandates fall protection for construction workers at
elevations of 6 feet or higher.
6. What is the maximum slope allowed for an accessible ramp?
A. 1:8
B. 1:10
C. 1:12
D. 1:16
Explanation: ADA guidelines specify a maximum slope of 1:12 to ensure
wheelchair accessibility.
7. Which of the following is considered a structural load?
A. Wind load
B. Dead load
C. Live load
D. All of the above
Explanation: Structural loads include dead loads (permanent weight), live
loads (occupants, furniture), and environmental loads such as wind or snow.
8. When mixing concrete, what is the correct water-to-cement ratio for
standard concrete?
, A. 0.25
B. 0.35
C. 0.50
D. 0.75
Explanation: A water-to-cement ratio of 0.50 is standard for most general-
purpose concrete, providing adequate strength and workability.
9. What is the purpose of expansion joints in concrete?
A. To increase strength
B. To add decorative elements
C. To allow for thermal expansion and contraction
D. To reduce curing time
Explanation: Expansion joints prevent cracking by accommodating
movement caused by temperature changes.
10.What type of foundation is typically used for a commercial building in a
high-water table area?
A. Slab-on-grade
B. Crawlspace
C. Pier and beam
D. Pile foundation
Explanation: Pile foundations transfer structural loads to deeper, more
stable soil layers in areas with high water tables.
11.When using scaffolding, what is the maximum distance between platforms?
A. 2 feet
B. 4 feet
C. 6 feet
D. 10 feet
Explanation: OSHA standards limit platform spacing to prevent falls and
provide safe working surfaces.
12.What is the minimum thickness of a concrete slab-on-grade for residential
construction?
A. 3 inches
100 QUESTIONS AND CORRECT DETAILED ANSWERS FOR
GUARANTEED SUCCESS / NEWEST 2025/2026 GRADED
A+||BRAND NEW VERSION!!
1. What is the minimum number of feet of clear working space required in
front of an electrical panel?
A. 24 inches
B. 30 inches
C. 36 inches
D. 42 inches
Explanation: The NEC requires a minimum of 36 inches of clear working
space in front of electrical panels to allow safe access for maintenance and
operation.
2. Which type of insurance is required by law for contractors in most states?
A. Property insurance
B. Workers’ compensation insurance
C. Liability insurance
D. Equipment insurance
Explanation: Liability insurance protects both the contractor and clients
against property damage or injuries caused by the contractor’s work.
3. What is the primary purpose of a building permit?
A. To collect fees
B. To inspect structural integrity
C. To ensure compliance with building codes
D. To schedule construction timelines
Explanation: Building permits verify that construction plans meet local and
state building codes for safety and compliance.
,4. When is a contractor required to provide a written contract?
A. For any project
B. Only for residential projects under $500
C. When the project exceeds the state-mandated threshold
D. Only when the client requests it
Explanation: Most states require a written contract for projects above a
certain monetary threshold to protect both parties.
5. According to OSHA, fall protection is required when workers are exposed to
heights of:
A. 4 feet
B. 6 feet
C. 10 feet
D. 12 feet
Explanation: OSHA mandates fall protection for construction workers at
elevations of 6 feet or higher.
6. What is the maximum slope allowed for an accessible ramp?
A. 1:8
B. 1:10
C. 1:12
D. 1:16
Explanation: ADA guidelines specify a maximum slope of 1:12 to ensure
wheelchair accessibility.
7. Which of the following is considered a structural load?
A. Wind load
B. Dead load
C. Live load
D. All of the above
Explanation: Structural loads include dead loads (permanent weight), live
loads (occupants, furniture), and environmental loads such as wind or snow.
8. When mixing concrete, what is the correct water-to-cement ratio for
standard concrete?
, A. 0.25
B. 0.35
C. 0.50
D. 0.75
Explanation: A water-to-cement ratio of 0.50 is standard for most general-
purpose concrete, providing adequate strength and workability.
9. What is the purpose of expansion joints in concrete?
A. To increase strength
B. To add decorative elements
C. To allow for thermal expansion and contraction
D. To reduce curing time
Explanation: Expansion joints prevent cracking by accommodating
movement caused by temperature changes.
10.What type of foundation is typically used for a commercial building in a
high-water table area?
A. Slab-on-grade
B. Crawlspace
C. Pier and beam
D. Pile foundation
Explanation: Pile foundations transfer structural loads to deeper, more
stable soil layers in areas with high water tables.
11.When using scaffolding, what is the maximum distance between platforms?
A. 2 feet
B. 4 feet
C. 6 feet
D. 10 feet
Explanation: OSHA standards limit platform spacing to prevent falls and
provide safe working surfaces.
12.What is the minimum thickness of a concrete slab-on-grade for residential
construction?
A. 3 inches
