ICC G34 Journeyman Gas Pipe Fitter Exam (2018 IFGC) Practice Exam
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- 55 questions (same as real exam)
- 120 minute time limit
- 5 topic areas covered
- 260 questions in pool
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ICC G34 Journeyman Gas Pipe Fitter (2018 IFGC) Practice Exam Guide
What's on the exam
Questions per topic, out of 55This practice exam is built around the official content outline for the ICC G34 Journeyman Gas Pipe Fitter (2018 IFGC) exam: General Requirements, Appliances and Equipment, Fuel Supply System Sizing, Combustion Air, Chimneys and Vents.
There are two ways to practice. The free practice exam gives you 10 questions per attempt, and you can take it as many times as you like. The full practice exam gives you 55 questions on a 2 hours clock, with a new draw from our question bank each time.
General Requirements 22 items
Our study plan for this topic: General Installation Requirements; Code Definitions and Terms; Plan Reading; Testing; Materials; Appliance Location and Prohibited Locations; Clearances to Combustible Construction and Clearance Reduction; Electrical Bonding and Grounding of Gas Piping.
Appliances and Equipment 13 items
Our study plan for this topic: Requirements for Specific Appliances & Equipment; Clothes dryer exhaust duct installation and maximum duct length requirements; Unvented room heater restrictions, oxygen-depletion safety systems, and input rating limits; Forced-air warm-air furnace prohibited return-air sources and circulating air requirements; Cooking appliance clearances, prohibited locations, and venting requirements; Vented and unvented fireplace appliance flame safeguard and ignition device requirements; Unit heater support, clearances, and installation in commercial garages and aircraft hangars; Water heater installation requirements and dual-use space-heating applications.
Fuel Supply System Sizing 5 items
Our study plan for this topic: Service and Distribution Pipe Sizing; Maximum Gas Demand Calculation and Load Determination; Pipe Sizing Methods (Longest Length, Branch Length, and Hybrid Pressure); Allowable Pressure Drop and Operating Pressure Limits; Sizing Table Selection by Pipe Material and Gas Type; Equivalent Length Allowances for Fittings and Valves; Specific Gravity Correction Factors for Gas Pipe Sizing; Low-Pressure vs. High-Pressure Sizing Equations.
Combustion Air 7 items
Our study plan for this topic: Combustion Air Source, Size of Ducts/Openings; Indoor combustion air requirements (standard method and known air-infiltration-rate method); Combining indoor spaces for combustion air (same story and different stories); Outdoor combustion air methods (two-permanent-openings and one-permanent-opening); Combination indoor and outdoor combustion air calculations; Mechanical combustion air supply systems and appliance interlock requirements; Louvers, grilles, and screens: net free area calculations and motorized louver interlocks; Combustion air duct installation requirements and restrictions.
Chimneys and Vents 8 items
Our study plan for this topic: Venting, Vent Connector, and Chimneys; Appliance venting categories and vent system type selection (Table 503.4); Vent and chimney termination location requirements; Draft hoods and draft controls installation requirements; Sizing of Category I appliance venting systems using tables (single and multiple appliances); Vent connector materials, clearances, slope, and installation requirements; Appliances not required to be vented and aggregate input limits; Factory-built chimney requirements and listings (UL 103, UL 959).
Sample 1 — General Requirements
Question: What is the maximum permitted length of the bonding jumper between the connection to a CSST gas piping system and the connection to the grounding electrode system?
- A. 50 feet
- B. 25 feet
- C. 100 feet
- D. 75 feet
Correct Answer: D
IFGC 2018 Section 310.2.3 limits the length of the bonding jumper to 75 feet between the gas piping connection and the grounding electrode system connection.
Reference: IFGC 2018 Section 310.2.3
Sample 2 — Appliances and Equipment
Question: Suspended-type unit heaters must be supported by elements designed to accommodate the weight and dynamic loads. What material must the hangers and brackets be constructed of?
- A. Steel or aluminum alloy
- B. Galvanized steel only
- C. Noncombustible material
- D. Any material approved by the manufacturer
Correct Answer: C
Per IFGC Section 620.2, suspended-type unit heaters shall be supported by elements designed and constructed to accommodate the weight and dynamic loads, and hangers and brackets shall be of noncombustible material.
Reference: IFGC 2018 Section 620.2
Sample 3 — Chimneys and Vents
Question: You are a journeyman plumber installing a common vent system for a 35,000 Btu/hr draft-hood-equipped water heater and a 100,000 Btu/hr fan-assisted furnace, both with 4-inch-diameter outlets, into a clay tile-lined masonry chimney. The common vent area must not be greater than how many times the smallest listed appliance vent area, flue collar area, or draft hood outlet area?
- A. Seven times
- B. Ten times
- C. Three times
- D. Five times
Correct Answer: A
Per IFGC Appendix B, Example 5b, Section 504.3.17 requires the common vent area to be not greater than seven times the smallest listed appliance categorized vent area, flue collar area, or draft hood outlet area.
Reference: IFGC 2018 Appendix B, Example 5b (Section 504.3.17)
Your first score is just a starting point. After every attempt, the results page shows how you did on each outline topic, so you can see what to work on next. Compare your score with the real exam's passing score, 70% correct, and keep at it until you pass consistently.
- Start with the questions you know. Go through the whole exam once and bookmark anything you're unsure about. Our practice exams let you bookmark and come back.
- Circle back to your bookmarks on the second pass.
- Keep an eye on your pace. The real exam works out to about 2 minutes 11 seconds per question.
- Turn every miss into a lesson. After each attempt, look up each missed question's reference in your book and read the section.
| Questions | 55 questions |
| Time limit | 2 hours |
| Passing score | 70% correct |
| Books in the exam room | Open book |
| Exam fee | $120 |
- Results for examinations taken electronically are available immediately after the examination is completed.
- You must wait 10 days before retaking a failed exam.
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.