ICC G28 Journeyman Plumber with Gas Exam (2018 IPC/IFGC) Practice Exam
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- 70 questions (same as real exam)
- 180 minute time limit
- 8 topic areas covered
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ICC G28 Journeyman Plumber with Gas (2018 IPC/IFGC) Practice Exam Guide
What's on the exam
Questions per topic, out of 70This practice exam follows the official content outline for the ICC G28 Journeyman Plumber with Gas (2018 IPC/IFGC) exam: Administration General Regulations, Plumbing Fixtures, Water Supply and Distribution, Sanitary Drainage, Plumbing Vent Requirements, Traps, Interceptors, and Separators, Storm Drainage, Gas Piping.
You can practice two ways. The free practice exam gives you 10 questions per attempt, and you can retake it whenever you like. The full practice exam gives you 70 questions on a 3 hours clock, with a new draw from our question bank each attempt.
Administration General Regulations 24 items
Our study plan for this topic: General Installation Requirements; Code Definitions and Terms; Plan Reading; Testing; Materials; Permits: application, issuance, expiration, and exemptions; Duties and authority of the code official; Inspections: types, sequence, and approval requirements.
Plumbing Fixtures 8 items
Our study plan for this topic: Water Heaters; Water Closets and Urinals; Specialty Fixtures; Bathtubs, Showers, Sinks, and Lavatories; Minimum Number of Required Plumbing Fixtures by Occupancy; Fixture Installation Requirements and Clearances; Faucets, Fixture Fittings, and Shower Valve Temperature Limits; Flushing Devices for Water Closets and Urinals.
Water Supply and Distribution 8 items
Our study plan for this topic: Service Distribution and Piping; Water Supply and Pressure; Protection of Potable Water Supply; Pipe Materials and Approved Standards for Water Service and Distribution; Joining Methods and Connection Types by Pipe Material; Fixture Supply Pipe Sizing and Flow Rate Requirements; Hot Water System Requirements and Temperature Controls; Valve Placement and Shutoff Requirements.
Sanitary Drainage 6 items
Our study plan for this topic: Building Sanitary Drainage; Sumps and Ejectors; Indirect and Special Waste Systems; Drainage pipe materials and applicable standards (above-ground, underground, and building sewer); Pipe joint types and methods by material; Slope and installation requirements for horizontal drainage piping; Drainage fixture unit values and system sizing; Cleanout requirements, placement, sizing, and access.
Plumbing Vent Requirements 5 items
Our study plan for this topic: Vent Connections and Grades; Vent Terminals; Vent Pipe Sizing and Developed Length; Trap-to-Vent Distance and Fixture Vents; Air Admittance Valves; Wet Venting Systems; Vent Stack and Relief Vent Requirements; Venting Methods (Individual, Common, Circuit, Combination Waste and Vent).
Traps, Interceptors, and Separators 5 items
Our study plan for this topic: Installation of Traps; Interceptors and Separators; Trap seal depth requirements and protection methods; Prohibited trap types; Trap sizing and dimensional requirements; Grease interceptor capacity and flow-through ratings; Oil separator design and capacity requirements; Sand, clothes washer, and specialty interceptors.
Storm Drainage 1 item
Our study plan for this topic: Storm Drainage; Sizing of vertical conductors, leaders, and horizontal storm drains using rainfall rate tables; Primary and secondary (emergency overflow) roof drains and scuppers; Prohibited connections and disposal requirements for storm water; Approved pipe materials for inside conductors, underground storm drains, and building storm sewers; Roof drain installation requirements and flow rate calculations; Storm drainage traps: requirements, sizing, and cleanouts; Subsoil drain pipe materials and installation.
Gas Piping 13 items
Our study plan for this topic: Gas Piping for Service & Distribution Piping; Gas Piping Requirements, Specific Appliances Equipment; Source of Combustion Air & Duct Openings; Fuel-burning Appliance, Vent, Connector; CSST bonding and electrical continuity requirements; Piping materials, standards, and prohibited materials; Pipe sizing methods and use of sizing tables; Pressure testing, inspection, and purging of piping systems.
Sample 1 — Administration General Regulations
Question: The board of appeals is first seated with five members holding staggered terms of one, two, three, four and five years. Thereafter, each newly appointed member serves a term of:
- A. 3 years
- B. 4 years
- C. 5 years
- D. 2 years
Correct Answer: C
Per IPC 109.2, the board of appeals consists of five members appointed with initial staggered terms of 1 through 5 years; thereafter, each new member shall serve for 5 years or until a successor has been appointed.
Reference: IPC 2018 Chapter 1 — Section 109.2 Membership of Board
Sample 2 — Gas Piping
Question: An aboveground portion of a gas piping system that is not corrugated stainless steel tubing (CSST) and that is likely to become energized must be electrically continuous and bonded to an effective ground-fault current path. Under what condition is such piping already considered to be bonded?
- A. Bonded to a driven ground rod at the gas meter
- B. Connected to an appliance served by a grounded circuit
- C. Clamped to interior building structural steel
- D. Jumpered to the cold water service piping
Correct Answer: B
IFGC 310.1 provides that gas piping other than CSST shall be considered to be bonded where it is connected to an appliance that is connected to the equipment grounding conductor of the circuit supplying that appliance. Note also that IFGC 309.1 prohibits using gas piping as a grounding electrode.
Reference: IFGC 2018 Sections 309.1 and 310.1
Sample 3 — Plumbing Fixtures
Question: Water closet bowls installed in public or employee toilet facilities are required to be of which type?
- A. Elongated type
- B. Square-front type
- C. Round-front type
- D. Compact type
Correct Answer: A
Per IPC Section 425.2, water closet bowls for public or employee toilet facilities shall be of the elongated type.
Reference: IPC 2018 Section 425.2
Your first attempt tells you where you're starting from. After every attempt, the results page shows your score for each outline topic, so you can see what to study next. Compare your score with the real exam's passing score, 70% correct, and keep going until you pass consistently.
- Answer the questions you know first, and bookmark the rest. Our practice exams let you bookmark and come back.
- Return to your bookmarks on the second pass.
- Keep a steady pace. The real exam works out to about 2 minutes 34 seconds per question.
- After each attempt, look up each missed question's reference and read the section.
| Questions | 70 questions |
| Time limit | 3 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.