Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) Exam Prep Checklist
Everything for the Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) exam in one place: the bulletin's key facts, the topics and how many questions each carries, the reference books, sample questions with answers, and a prep checklist. Pearson VUE gives the exam.
Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) Exam Facts
From the official bulletin:
| Questions | 75 questions |
| Time limit | 3 hours |
| Passing score | a minimum score of 70 |
| Books in the exam room | Open book |
| Exam fee | $115 |
On exam day
- Questions are four-option multiple choice with one correct answer.
References you may bring
- International Fuel Gas Code (2015)
Scheduling, changes and retakes
- Exams are scheduled through PearsonVUE at www.pearsonvue.com/ICC.
- Results for electronically administered examinations are available immediately after the exam is completed.
- You must wait 10 days before retaking a failed exam.
- Upon passing, contact the jurisdiction for any other requirements needed to become licensed.
Source: Denver, Colorado Contractor/Trades Examination Information Bulletin, Published June 3, 2026 (page headers read "August 19, 2025"). Check the bulletin before test day: fees and rules can change.
Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) Exam Topics
The official content outline has 6 topics:
| Topic | Questions | Share of the exam |
|---|---|---|
| General Requirements | 29 | 39% |
| Appliances and Equipment | 10 | 13% |
| Fuel Supply Systems | 13 | 17% |
| Combustion Air | 9 | 12% |
| Chimneys and Vents | 10 | 13% |
| Special Requirements | 4 | 6% |
Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) Exam Prep Checklist
- Get the reference books the bulletin lists, in the editions it names.
- Learn each book's table of contents and index first.
- Highlight the sections you use most. Check the bulletin's rules on tabs and markings before you add any.
- Start with the biggest topics: General Requirements and Fuel Supply Systems (56% of the exam).
- Take our timed practice exams until you pass several in a row.
- After each attempt, look up every question you missed in your book.
- Practice at the real exam's pace: about 2 minutes 24 seconds per question.
Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) Exam Reference Books
The only listed reference is the 2015 International Fuel Gas Code.
Where to get them:
Test Day Checklist
- First pass: answer every question you know. Bookmark the rest. Every exam lets you return to bookmarked questions (some lock them once you take a break).
- Second pass: work through your bookmarks.
- Pace: 3 hours for 75 questions, which is about 2 minutes 24 seconds per question.
- Last step: answer anything still blank. A blank can't earn a point.
Study Tips
Practicing against a ticking clock is the best way to beat exam-clock anxiety. Use these timed tests to build your pacing, so you learn to move steadily and never burn too long on a single question. By test day, the format feels routine.
You're given plenty of time, so use as much of it as you need. Don't get rattled when other people finish early — finishing first isn't a prize. Work at your own steady pace and review your answers before you submit.
Several 25–30 minute sessions across the week beat one long cram. Spaced repetition moves facts into long-term memory so they stick through exam day.
On tough multiple-choice questions, rule out the options you know are wrong before choosing. Narrowing to two choices sharply improves your odds even when you're unsure.
Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) Sample Questions
From our practice question bank, with answers and references:
Sample 1 — Chimneys and Vents
Question: You are evaluating the chimney termination for a gas-fired medium-heat appliance at an industrial plant. A portion of an adjacent building stands 20 feet horizontally from the chimney. The chimney shall extend not less than how much higher than that portion of the building?
- A. 3 feet
- B. 10 feet
- C. 5 feet
- D. 2 feet
Correct Answer: B
IFGC 2015, Section 503.5.4 requires chimneys for medium-heat appliances to extend not less than 10 feet higher than any portion of any building within 25 feet. The 3-foot/2-foot-within-10-foot rule and the 5-foot-above-the-draft-hood rule in the same section apply to residential-type and low-heat appliance chimneys.
Reference: IFGC 2015 Section 503.5.4
Sample 2 — Combustion Air
Question: Within a dwelling unit, you plan to convey combustion air through an unobstructed stud space rather than installing galvanized steel duct. Under what condition is this permitted?
- A. The stud space serves only the lower opening
- B. The stud space is lined with galvanized steel
- C. The opening is not less than 100 square inches
- D. Not more than one required fireblock is removed
Correct Answer: D
The exception to IFGC Section 304.11, item 1, permits unobstructed stud and joist spaces within dwelling units to convey combustion air, provided that not more than one required fireblock is removed. All other duct provisions of Section 304.11 continue to apply.
Reference: IFGC 2015 Section 304.11, Item 1 Exception
Sample 3 — Special Requirements
Question: For code purposes, an assembly of piping, devices and apparatus designed to generate, store, contain, distribute or transport a nontoxic gaseous hydrogen mixture qualifies as a gaseous hydrogen system when the mixture meets which composition limits by volume?
- A. At least 95 percent hydrogen; not more than 1 percent oxygen
- B. At least 90 percent hydrogen; not more than 2 percent oxygen
- C. At least 98 percent hydrogen; not more than 1 percent oxygen
- D. At least 95 percent hydrogen; not more than 5 percent oxygen
Correct Answer: A
IFGC 2015 Section 702.1 defines a GASEOUS HYDROGEN SYSTEM as an assembly handling a nontoxic gaseous hydrogen containing mixture having at least 95 percent hydrogen gas by volume and not more than 1 percent oxygen by volume.
Reference: IFGC 2015 Section 702.1
Sample 4 — General Requirements
Question: When determining the volumetric flow rate of gas to be provided for pipe sizing, an adjustment for altitude is required where the installation is above what elevation?
- A. 5,000 feet
- B. 2,000 feet
- C. 2,500 feet
- D. 1,000 feet
Correct Answer: B
IFGC 2015 Section 402.2 requires that the volumetric flow rate of gas to be provided be adjusted for altitude where the installation is above 2,000 feet (610 m) in elevation.
Reference: IFGC 2015 Section 402.2
Online Practice vs. a PDF
- Timed: you practice finding answers under time pressure, not just reading them.
- Bookmarks: flag questions and come back, the way you will on test day.
- New sets: each attempt draws new questions from our bank.
- Scored by topic: your results show which outline topics need more study.
Next Step
- Take the free Denver Master Gas Pipe Fitter (ICC F33, 2015 IFGC) practice exam.
- Study the topics where you scored lowest.
- Read the exam bulletin for the official rules, and see the licensing board's website.