NASCLA format at a glance
| PSI format | Current bulletin |
|---|---|
| Scored questions | 115 |
| Minimum passing score | 81 |
| Additional unscored items | 10 |
| Time allowed | 330 minutes |
| Reference access | Open book; only permitted materials |
Source: PSI NASCLA bulletin, updated July 7, 2026, checked November 1, 2026. Use its current reference editions and material rules before buying a kit.
Why books do not make the test easy
A reference can answer a precise question only after you identify the right subject and search terms. A candidate who opens the wrong book loses time even with perfect tabs. Construction experience helps with context, but habitual field practice is not a substitute for checking the exam’s stated code edition or contract rule.
Separate your practice errors into wrong source, slow navigation, wrong interpretation and calculation. If you locate the right page quickly but still miss the answer, adding tabs will not fix the problem. Read the condition and exception attached to the rule, then explain how they fit the scenario.
The current PSI format
The PSI bulletin, updated July 7, 2026, lists 115 scored questions, a minimum passing score of 81 and 330 minutes. It also describes 10 additional unscored pretest items and says their time is included in the allowance. Checked November 1, 2026; follow your current appointment instructions if the bulletin changes.
A planning calculation using 330 minutes across 125 presented items is about 2.6 minutes per item. That is an average for practice, not an official per-question deadline. Short recall questions can leave room for calculations and reference searches. Avoid building a plan that assumes every question gets a long lookup.
A useful pacing drill
Before opening a reference, name the likely book and chapter. Start a timer, find the rule, and record whether your first source choice was correct. Repeat with different wording so you learn the route rather than memorising a page number.
In a mixed set, answer the questions you can justify efficiently and flag the ones that need more work using the practice interface. Revisit flagged items with a specific search phrase. After the set, compare time spent with the type of error; the longest questions are not always the ones you understood least.
Book preparation and topic balance
The bulletin’s outline gives the largest item counts to procurement and contracting requirements and general requirements. Include those in your rotation alongside technical subjects rather than studying only the trade you know best. Use the current bulletin for reference editions and material rules; a second-hand book kit may be out of date.
For a detailed setup checklist, read open-book mistakes. For actual navigation practice use the trainer. These exercises are independent practice, not PSI exam items.
Choose the board before choosing the exam
Check NASCLA state acceptance and the destination board before paying for books or an examination. State applications, business-and-law requirements and other licensing conditions remain separate. No single difficulty ranking can tell you which route your board will accept.
Three myths to leave behind
- Open book means easy: a reference helps only when you can find and interpret the relevant rule. Practise the open-book mistakes checklist.
- Field experience replaces navigation practice: experience gives context but may not match the code edition or contract condition on the exam.
- NASCLA is an all-state license: boards retain their own application requirements. Compare NASCLA, Florida and California routes before purchasing another exam.
A little more clarity
Questions, answered.
Is NASCLA open book?
Yes, under the current PSI bulletin. Only permitted references and materials may be used; consult the current edition list and book rules.
Does passing NASCLA license me everywhere?
No. Participating boards may accept the examination for a trade requirement, but each board controls its licensing application and other conditions.
Should I look up every answer?
Practise deciding which answers you can justify from knowledge and which need a reference. Looking up everything can consume the time needed for harder questions.
How hard is the NASCLA exam?
It can be challenging despite being open book because reference selection, interpretation and pacing must work together. There is no universal difficulty score.
What are the NASCLA passing score and time allowance?
The PSI bulletin updated July 7, 2026 lists 115 scored questions, a minimum score of 81 and 330 minutes, with 10 additional unscored items.
How much time should I spend on each question?
330 minutes divided by 125 presented items is about 2.6 minutes per item. This is practice arithmetic, not an official per-question deadline.
Which references should I bring?
Use the permitted reference list and editions in the current PSI bulletin. Do not rely on a seller’s book count or an old kit.
Put your next step into focus.
Take what you have learned into your next study session. Use the linked practice and resources to decide where to focus.
Try the NASCLA open-book trainerEducational information and independent practice. Confirm current examination, education and licensing requirements with the linked official sources. Practice results do not guarantee an examination result or eligibility.