ICC F33 Master Gas Pipe Fitter Exam (2015 IFGC)

How to Pass the ICC F33 Master Gas Pipe Fitter (2015 IFGC) Exam

You don't have to guess how to prepare for the ICC F33 Master Gas Pipe Fitter (2015 IFGC) exam. This guide lays it out: the key facts from the official bulletin, the topics on the test, the books you need, sample questions with answers, and a study plan you can follow. Pearson VUE gives the exam.

ICC F33 Master Gas Pipe Fitter (2015 IFGC) Exam Basics

Here's what the official bulletin says about the exam:

On exam day

• The exam consists of multiple-choice questions.
• You may bring copyrighted, bound books to the test administration, including those specifically listed as approved references. However, training materials such as presentations, study guides, or practice questions are not permitted. All exam questions are based solely on the approved reference list, and only those references may be used as the basis for appealing exam questions.

References you may bring

• 2015 International Fuel Gas Code

Scheduling, changes and retakes

• Exams are scheduled through PearsonVUE at www.pearsonvue.com/ICC, where candidates can create an account, schedule an exam, locate a test center, purchase vouchers and request accommodations.
• Results for examinations taken electronically are available immediately after the examination is completed.
• You must wait 10 days before retaking a failed exam.
• After passing, contact the jurisdiction in which you wish to be licensed for any other requirements, because ICC is not a licensing agency.

Source: National Contractor/Trades Examination Information Bulletin, PUBLISHED June 30, 2026; ICC Exam Catalog, checked October 6, 2026. Check the bulletin before test day: fees and rules can change.

What's on the ICC F33 Master Gas Pipe Fitter (2015 IFGC) Exam

The official content outline splits the exam into 6 topics:

Your ICC F33 Master Gas Pipe Fitter (2015 IFGC) Study Plan

Your books are your best friend on this exam. It's open book, so the references on the bulletin's list are what you'll use on test day. Get your own copies in the editions the bulletin names.

Get to know them early. Spend time with each book's table of contents and index until you can find any major subject quickly. On an open-book exam, finding answers fast is the skill that counts.

Make the books yours. Highlight the sections you keep coming back to. The exam facts above list the bulletin's rules on tabs and markings, so follow them exactly.

Put your energy where the points are. General Requirements and Appliances and Equipment make up 64% of the exam, so start there.

Practice with the clock running. Our timed practice exams help you build the pace the real exam needs: about 2 minutes 24 seconds per question. Every attempt is another rep.

Keep going until you pass practice exams consistently. One good score is a great start. A few passing scores in a row is how you know you're ready.

Books You'll Need for the ICC F33 Master Gas Pipe Fitter (2015 IFGC) Exam

The listed reference for this exam is the 2015 International Fuel Gas Code.

Where to get them:

• IFGC 2015

Test Day Tips

Start with a quick pass through the whole exam. Answer every question you're sure about and bookmark the rest. Every exam lets you return to bookmarked questions, so nothing is lost by moving on.

Then come back to your bookmarks and work through them one at a time. Keep an eye on the clock: you have 3 hours for 75 questions, which is about 2 minutes 24 seconds per question. Before you finish, make sure every question has an answer. A blank can't earn a point.

Study Tips

On an open-book exam, the winners aren't the smartest people in the room — they're the fastest at finding answers. Buy the required book, practice with it open, and tab and highlight each section the first time a question sends you there. Learn the index and table of contents until you can land on any topic in seconds. That speed is what separates a pass from a fail.

Know your way around each book's index and table of contents. Open-book exams reward speed: you need to find specific items quickly.

On an open-book exam, work through every question once: answer the ones you know and skip the ones you don't. Then go back to the ones you flagged. You can bookmark questions for later review, just like on our exams — and don't sink too much time into any single question. The clock is still running.

Give yourself at least three to six weeks. Use your exam's candidate bulletin as your roadmap for what's tested, and spend your time on finding-it-fast skills over rote memorization. In practice, aim for three clean passes at 80% or higher — setting your practice bar above the real cut score gives you a comfortable margin on test day.

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.

This practice exam mirrors the real Pearson VUE exam — the same number of questions, drawn from the same topics. Practicing in that format now means no surprises when you sit for the real thing.

Try These ICC F33 Master Gas Pipe Fitter (2015 IFGC) Practice Questions

Give these a try. They come from our practice question bank, each with its answer and reference.

Sample 1 — Chimneys and Vents

Question: A single-wall metal pipe vent is being fabricated from galvanized sheet steel for a run directly from the appliance space through the roof. What is the minimum permitted thickness of the galvanized sheet steel?

• A. 0.0304 inch
• B. 0.018 inch
• C. 0.0187 inch
• D. 0.0234 inch

Correct Answer: A

Per IFGC 2015, Section 503.7.1, single-wall metal pipe shall be constructed of galvanized sheet steel not less than 0.0304 inch thick, or other approved noncombustible, corrosion-resistant material. The 0.018-inch value applies to galvanized sheet steel residential-type vent connectors (Section 503.10.2.3), and 0.0187 inch is the minimum steel thickness for insulation shields (Section 502.4).

Reference: IFGC 2015 Section 503.7.1

Sample 2 — Water Heaters

Question: A draft-hood-equipped gas water heater is to be vented into a clay-tile-lined exterior masonry chimney using a Type B double-wall vent connector, sized with the masonry chimney table in combination with the exterior masonry chimney table. Besides the connector type and length limits, which additional condition applies specifically to the water heater?

• A. The chimney internal area must be at least 28 square inches
• B. The chimney vent height must be at least 15 feet
• C. The connector rise must be not less than 2 feet
• D. The outdoor design temperature must be not less than 5°F

Correct Answer: D

IFGC 2015 §504.2.9 permits Table 504.2(3) in combination with Table 504.2(6) to be used for clay-tile-lined exterior masonry chimneys only when all listed conditions are met; Item 5 states that for a water heater, the outdoor design temperature shall be not less than 5°F (-15°C).

Reference: IFGC 2015 Section 504.2.9 (Item 5)

Sample 3 — Fuel Supply System Sizing

Question: As the master on a low-pressure natural gas installation, you measure 7.0 inches w.c. available at the point of delivery. The manufacturer's data for the most remote appliance lists a minimum inlet supply pressure of 4.5 inches w.c. With no intervening line pressure regulator, what is the greatest design pressure loss permitted in the piping serving that appliance?

• A. 2.5 inches w.c.
• B. 3.0 inches w.c.
• C. 0.5 inch w.c.
• D. 4.5 inches w.c.

Correct Answer: A

IFGC 2015 Section 402.5 requires that the supply pressure at the appliance be greater than or equal to the minimum pressure required by the appliance. 7.0 in. w.c. available minus 4.5 in. w.c. required leaves 2.5 in. w.c. of allowable design pressure loss. The 0.5 in. w.c. figure is merely a common capacity-table basis, not the code limit.

Reference: IFGC 2015 Section 402.5 (see also Section 402.1)

Sample 4 — General Requirements

Question: Gas piping is being run through solid-sawn wood floor joists in an existing building. For holes bored through those joists, what are the required edge distance from the top and bottom of the joist and the maximum hole diameter?

• A. 2 inches from top and bottom; one-third the joist depth
• B. 2 inches from top and bottom; one-fourth the joist depth
• C. 1 inch from top and bottom; one-third the joist depth
• D. 1 1/2 inches from top and bottom; one-sixth the joist depth

Correct Answer: A

Per IFGC 2015 Section 302.3.2: 'Holes bored in joists shall not be within 2 inches (51 mm) of the top and bottom of the joist and their diameters shall not exceed one-third the depth of the member.' Option A correctly states both requirements. The one-fourth limit applies to end notching, and the one-sixth limit applies to top/bottom notches.

Reference: IFGC Section 302.3.2

Why Practice Online?

Reading questions in a PDF is a start, but it doesn't prepare you for the clock. Our practice exams are timed and on a screen, so you build speed along with knowledge. Each attempt draws a new set of questions from our bank, and your results show your score by topic so you know where to focus next.

Ready to Start?

Take the free ICC F33 Master Gas Pipe Fitter (2015 IFGC) practice exam and see where you stand today. Then focus on the topics that need the most work. For the official rules, read the exam bulletin, and see the licensing board's website.