ICC B1 Residential Building Inspector Full Mock Exam
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Sit a complete timed exam under test-centre conditions. You see no answers until you submit, then you get a score report by section and a full review with explanations.
Exam Format
Before You Begin
ICC's B1 outline lists 60 questions in 2 hours, open book. ICC passes at a scaled score of 75, which isn't a percentage, so the 75% here is only an approximation. Source: ICC B1 exam content outline.
- The timer starts when you begin and the exam submits itself when time runs out.
- Move freely with Previous, Next or the numbered navigator, and flag any question to come back to.
- No feedback is shown until you submit. Unanswered questions count as wrong.
- Nothing is sent anywhere; the exam runs entirely in your browser.
Exam Format
Before You Begin
ICC's B1 outline lists 60 questions in 2 hours, open book. ICC passes at a scaled score of 75, which isn't a percentage, so the 75% here is only an approximation. Source: ICC B1 exam content outline.
- The timer starts when you begin and the exam submits itself when time runs out.
- Move freely with Previous, Next or the numbered navigator, and flag any question to come back to.
- No feedback is shown until you submit. Unanswered questions count as wrong.
- Nothing is sent anywhere; the exam runs entirely in your browser.
ICC B1 Residential Building Inspector Practice Test
These are original questions written by the Trade Exam Hub editorial team from the cited official sources. They are not real exam questions, and no exam body endorses this site. Full Mock Exams.
What the ICC B1 Residential Building Inspector Mock Exam Covers
Each attempt draws 60 questions at random from a pool of 287. The pool covers these topics. Your score report breaks your result down the same way, so you can see which areas need more study.
| Topic | Questions in Pool | Share |
|---|---|---|
| Egress, Stairs and Guards | 71 | 25% |
| Footings and Foundations | 56 | 20% |
| Floors, Slabs and Decks | 25 | 9% |
| Wall Framing | 20 | 7% |
| Wall Coverings and Flashing | 15 | 5% |
| Roof and Ceiling Framing | 15 | 5% |
| Fire Separation, Alarms and Glazing | 49 | 17% |
| Building Planning and Design Criteria | 36 | 13% |
About 67% of the pool is recall and core-concept questions. The other 33% are harder applied questions, such as scenarios, calculations or details that are easy to confuse.
Editor's Note on the ICC B1 Residential Building Inspector Exam
You get 2 minutes per question. Tab IRC Chapter 3 (R310 escape openings, R311 stairs, R312 guards) and the Chapter 4 anchor-bolt and crawl-space rules so you can find them quickly. Source: ICC before-the-exam page.
ICC B1 Residential Building Inspector Mock Exam Pacing Plan
You have 120 minutes for 60 questions, which is about 2.0 minutes per question. Use these checkpoints to stay on pace:
| Checkpoint | Be at or past question | Elapsed time |
|---|---|---|
| First quarter | 15 | 30 min |
| Halfway | 30 | 60 min |
| Three quarters | 45 | 90 min |
If you are behind, flag any question that is taking too long and move on. Leave a few minutes at the end to go back to your flagged questions. Unanswered questions count as wrong, so give an answer to every question before time runs out.
What Score Do You Need?
To pass, you need 45 of 60 correct (75%), so you can miss up to 15 questions. The official pass mark is not published in a form we can verify, so treat this as a practice target. We suggest scoring 10 points above the pass mark on two attempts in a row before you book the real exam, because the pool here is smaller than the official bank.
Sample ICC B1 Residential Building Inspector Mock Exam Questions
Here are three questions from the pool, with their answers and sources.
Q1. Minimum net clear opening for an emergency escape and rescue opening (not at grade floor):
- 5.7 sq ft (correct)
- 5.0 sq ft
- 4.0 sq ft
- 9.0 sq ft
Source text: “shall have a net clear opening of not less than 5.7 square feet…” Reference: IRC R310.2.1.
Q2. Finished grade must fall away from the foundation at least 6 inches within the first:
- 10 feet (correct)
- 5 feet
- 6 feet
- 20 feet
Source text: “The grade shall fall not fewer than 6 inches (152 mm) within the first 10 feet…” Reference: IRC R401.3.
Q3. Minimum end bearing for a floor joist on wood or metal:
- 1-1/2 inches (correct)
- 1 inch
- 3 inches
- 2 inches
Source text: “shall have not less than 1-1/2 inches (38 mm) of bearing on wood or metal…” Reference: IRC R502.6.
How to Use Your Score Report
- Sort by topic. Start your next study session with any topic where you scored below 75%.
- Read the source. Each answer cites a section or quotes its source text. Read the surrounding passage, not just the answer line.
- Drill, then retest. Use the adaptive practice test on your weak topics. It gives you more of the kinds of questions you miss. Then take this mock again for a new random set.
- Return to the guide. The ICC B1 Residential Building Inspector guide covers exam fees, scheduling, retake rules and what to bring on test day.
Sources Behind These Questions
Questions in this pool cite these references: IRC R310.2.1; IRC R310.2.2; IRC R310.2.3; IRC R310.1; IRC R310.1.1; IRC R310.2.4. Each question shows its exact reference when you review your answers.
Frequently Asked Questions
How many questions are on the ICC B1 Residential Building Inspector mock exam?
This mock has 60 questions, drawn at random from a pool of 287, so each attempt is different. The count matches the official exam.
How long do I get, and how fast should I work?
The timer is set to 120 minutes, or about 2.0 minutes per question. Aim to be past question 30 by minute 60.
What score do I need to pass the ICC B1 Residential Building Inspector mock?
75%, which is 45 of 60 correct. That is a practice target, not an official pass mark.
Are these real ICC B1 Residential Building Inspector exam questions?
No. They are original questions written from the official sources cited in each answer, and no exam body endorses them. Use them to find weak topics, then confirm the details in the source.
Is the ICC B1 Residential Building Inspector mock exam free?
Yes. There is no login and no sign-up, and the exam runs entirely in your browser. Nothing you enter is sent to us.