United States
Hong KongThe hardest categories
Procurement and Contracting at 31 questions and General Requirements at 25 are the hardest for most candidates, because they are the office and safety half of the job rather than the trade half.
The hardest categories are not the ones candidates expect, and the mismatch is why people fail.
By question count
| Category | Questions | Typical difficulty |
|---|---|---|
| Procurement and Contracting | 31 | High - unfamiliar to many |
| General Requirements | 25 | High - detailed OSHA numbers |
| Site Construction | 15 | Moderate |
| Everything else | 44 across nine categories | Lower, and thinly spread |
Why Procurement is hard
Because most contractors learned contracts by signing them, not by studying them. You know your contracts; the exam asks about general principles.
Order of precedence, bond types, lien deadlines, liquidated damages, markup against margin, business entity liability. All learnable, none intuitive from experience.
Six feet, ten feet, fifteen feet. Four times, six times, twice. Eight hours, twenty-four hours, fifteen working days. Individually trivial and collectively slippery, and there are 25 questions of it.
What is genuinely easier
The trade categories, for a working contractor. Concrete, wood, masonry and finishes are the daily job, and the numbers in them are ones you have used.
They are also worth 44 questions across nine categories, which is less than the top two combined.
What to do about it
Give Procurement and General Requirements more than half your study time, tab their references more finely than anything else, and work practice questions in both from the first week.
Common questions
What is the hardest part of the NASCLA exam?
Procurement and Contracting Requirements at 31 questions and General Requirements at 25, which are the business and safety material.
Why is Procurement hard for contractors?
Because most learned contracts by signing them rather than studying them, and the exam asks about general principles.
What makes General Requirements difficult?
The density of similar numbers - trigger heights, capacity multiples and reporting deadlines that are easily confused.
Which categories are easier?
The trade categories, for a working contractor, though they total 44 questions across nine categories.
How should I allocate study time?
More than half to the top two categories, with the finest tabbing on their references.