Licensing · Contractor
NASCLA Commercial General Building Contractor — Practice Exam
Practice for the NASCLA Accredited Examination for commercial general building contractors: safety and general requirements, site work, building trades and the business, contracting and project-management questions, weighted like the official outline.
Questions last checked against the official sources on October 6, 2026.
The real exam at a glance
- Questions
- 115 scored (plus 10 pretest), multiple choice
- Time
- 330 minutes, open book
- Pass mark
- 70%
- Accepted by
- 17 states and the U.S. Virgin Islands (many add a state business and law exam)
What you'll practise
Try a question
What does a drainage plane behind siding do?
- Lets water that gets past the cladding drain down and out
- Insulates the wall
- Stops all air movement through the wall
- Holds the siding nails tightly in place against the sheathing and studs
Show the answer
A. Lets water that gets past the cladding drain down and out — Housewrap or building paper often serves as the drainage plane.
Sample questions by topic (in English)
- General requirements: safety
- Site construction: excavation
- Site construction: stormwater
- Site construction: earthwork
- Concrete
- Masonry
- Metals
- Wood
- Doors, windows and glazing
- Mechanical and plumbing
- Electrical
- Procurement and contracting: payroll taxes
- Procurement and contracting: contracts
- Procurement and contracting: insurance
- Procurement and contracting: business organization
- Procurement and contracting: project administration
Ask the examiner
Ask about this exam: why an answer is wrong, a grammar point, or “quiz me on …”.
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Questions about the NASCLA Commercial GC
Is this the official NASCLA Commercial GC?
No. Semplr is independent and not affiliated with the exam body. We write every question ourselves, in the official format and at the official level.
What is the real NASCLA Commercial GC like?
Questions: 115 scored (plus 10 pretest), multiple choice. Time: 330 minutes, open book. Pass mark: 70%. Accepted by: 17 states and the U.S. Virgin Islands (many add a state business and law exam).
How is my practice marked?
Instantly. You see your score against the pass mark, and an explanation for every question — including the ones you got right.
Can I take it on my phone?
Yes. The whole mock exam works on a phone, and your progress is saved in your browser.
Ready for a full run?
One sitting, real timing, then your score against the pass mark.
Start the free mock exam