ICC F27 Master Plumber with Gas Exam (2015 IPC/IFGC) Practice Exam
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Test your knowledge with 10 questions from our pool of 20 free questions.
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Full Practice Exam
Complete exam simulation matching the real Pearson VUE test format.
- 80 questions (same as real exam)
- 240 minute time limit
- 11 topic areas covered
- 350 questions in pool
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ICC F27 Master Plumber with Gas (2015 IPC/IFGC) Practice Exam Guide
What's on the exam
Questions per topic, out of 80This practice exam follows the official content outline for the ICC F27 Master Plumber with Gas (2015 IPC/IFGC) exam: Administration, General Regulations, Fixtures, Water Heaters, Water Supply & Distributions, Sanitary Drainage, Vents, Traps, Interceptors, & Separators, Storm Drainage, Plan Reading, Gas.
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 80 questions on a 4 hours clock, with a new draw from our question bank each attempt.
Administration 3 items
Our study plan for this topic: Scope and applicability of the IPC and IFGC (systems, appliances, and exclusions); Duties and powers of the code official (enforcement, interpretations, right of entry, identification); Permit requirements, application process, and exempt work; Permit issuance, validity, expiration, extension, and revocation; Construction document requirements and retention; Required inspections (underground, rough-in, and final) and testing procedures; Violations, stop work orders, penalties, and unsafe installation authority; Board of appeals composition, qualifications, procedures, and decision-making.
General Regulations 7 items
Our study plan for this topic: Key plumbing definitions and terminology (IPC Chapter 2); Prohibited locations and connections for plumbing systems; Material identification, approval, and third-party certification requirements; Protection of pipes from corrosion, freezing, and physical damage; Trenching, bedding, and backfill requirements for buried piping; Piping support intervals and hanger spacing by material type; Required tests and inspections for drainage, vent, and water supply systems; Alternative engineered design submittal and approval process.
Fixtures 4 items
Our study plan for this topic: Minimum number of required plumbing fixtures by occupancy classification; Fixture installation requirements (spacing, clearances, and alignment); Prohibited fixtures and connections; Fixture material standards and quality requirements; Faucets and fixture fittings (approval, shower valves, and temperature limits); Flushing devices for water closets and urinals; Individual fixture requirements (bathtubs, showers, urinals, water closets, sinks, and specialty fixtures); Accessible plumbing fixture requirements.
Water Heaters 3 items
Our study plan for this topic: Temperature and pressure relief valve requirements and installation; Relief valve discharge piping requirements; Water heater installation location and access requirements; Safety devices: antisiphon, vacuum relief, and shutdown provisions; Drain valves and required pans for leak protection; Water temperature limits and thermostatic mixing valves for combination systems; Water heater labeling, pressure marking, and third-party certification; Attic installation passageway and clearance dimensions.
Water Supply & Distributions 9 items
Our study plan for this topic: Water distribution system design criteria: minimum flow rates and pressures at fixture supply outlets; Maximum flow rates and water consumption limits for plumbing fixtures and fixture fittings; Approved pipe and fitting materials for water service and water distribution systems; Jointing methods by pipe material type (soldering, solvent cementing, heat fusion, mechanical, brazed); Backflow prevention devices and assemblies: types, applications, hazard classifications, and installation requirements; Protection of potable water supply: cross-connection control, air gaps, and nonpotable water system identification; Valve placement requirements: full-open valves, shutoff valves, pressure-reducing valves, and water hammer arrestors; Hot water supply system requirements: temperature limits, recirculation systems, thermal expansion control, and disinfection of new systems.
Sanitary Drainage 7 items
Our study plan for this topic: Drainage fixture unit values and system sizing tables; Slope and installation requirements for horizontal drainage piping; Approved materials and standards for above-ground, underground, and building sewer pipe; Pipe joint types and requirements by material; Cleanout placement, sizing, and access requirements; Sumps, sewage ejectors, and below-grade subdrain systems; Backwater valve installation and requirements; Indirect waste piping, air gaps, air breaks, and waste receptors.
Vents 10 items
Our study plan for this topic: Trap seal protection and pressure differential limits; Vent terminal location and clearance requirements; Vent pipe sizing using fixture units and developed length; Types of venting methods (individual, common, wet, circuit, combination waste and vent, single stack); Air admittance valve installation and restrictions; Vent stack and stack vent requirements for multi-story buildings; Frost closure and exterior vent protection requirements; Vent pipe grading, rise, and connection to drainage system.
Traps, Interceptors, & Separators 3 items
Our study plan for this topic: Fixture trap requirements and prohibited trap types; Trap seal depth requirements and protection methods; Grease interceptor and automatic grease removal device requirements; Oil separator design and capacity requirements; Sand, solids, and specialty interceptors for commercial establishments; Interceptor and separator venting, access, and maintenance; Trap sizing and installation requirements.
Storm Drainage 2 items
Our study plan for this topic: Sizing of vertical conductors, leaders, and horizontal storm drains using 100-year rainfall rate and flow tables; Primary and secondary (emergency overflow) roof drains and scuppers — requirements and sizing; Approved materials for inside conductors, underground storm drain pipe, building storm sewer pipe, and subsoil drain pipe; Roof drain installation, flow rate determination, and ponding/roof design requirements; Storm drainage traps — when required, sizing, material, and cleanout provisions; Sump pits and pumping systems — capacity, pit dimensions, piping, and check valve requirements; Subsoil drains and building subdrains — pipe type, minimum size, backwater valve, and discharge requirements; Prohibited drainage connections and restrictions on conductor pipe use.
Plan Reading 17 items
Our study plan for this topic: Reading and interpreting water supply system drawings (pipe sizing, fixture supply, and distribution layouts); Interpreting drainage system plans including pipe slopes, stack configurations, and fixture unit loads; Reading vent system diagrams including vent stack sizing, developed length, and vent termination requirements; Identifying pipe materials and joint types for water supply, drainage, and vent systems from plan specifications; Locating required valves, cleanouts, and backflow prevention devices on plumbing drawings; Interpreting fixture unit tables and drainage sizing tables (Tables 709.1, 710.1, 906.1) from construction documents; Reading plans for required clearances, access provisions, and code-mandated separation distances; Water Supply and Distribution.
Gas 15 items
Our study plan for this topic: Gas piping materials and fittings (steel, copper, CSST, polyethylene, aluminum); Gas pipe sizing methods and sizing tables (longest length, branch length, hybrid pressure); Gas piping installation requirements (burial depth, prohibited locations, protection, support); Pressure testing and purging of gas piping systems; Shutoff valves and flow controls (regulators, excess flow valves, appliance shutoff valves); Combustion and dilution air requirements for gas appliances; Venting systems for gas appliances (vent types, sizing, termination, connectors); Specific gas appliances (furnaces, boilers, water heaters, unvented room heaters, cooking appliances, clothes dryers).
Sample 1 — Plan Reading
Question: A plumbing specification section for a new office building separately identifies the pipe, pipe fittings, joints, valves, faucets and fixture fittings that supply water for drinking and cooking purposes. In addition to complying with NSF 372, those items must have a weighted average lead content not greater than what value?
- A. 2 percent
- B. 8 percent
- C. 0.2 percent
- D. 0.25 percent
Correct Answer: D
Per IPC 2015, Section 605.2.1, pipe, pipe fittings, joints, valves, faucets and fixture fittings used to supply water for drinking or cooking purposes shall comply with NSF 372 and have a weighted average lead content of 0.25 percent or less. The 8-percent figure in Section 605.2 applies to general water supply system pipe and fittings, and 0.2 percent is the definition of 'lead free' for solder and flux under Sections 605.13.3 and 605.14.6.
Reference: IPC 2015 Section 605.2.1
Sample 2 — Gas
Question: A single-wall metal pipe vent serving a listed appliance with a draft hood must pass through a combustible exterior wall. The installation provides a run of 8 feet of metal pipe in the open between the draft hood outlet and the point of wall passage. Where a ventilated metal thimble is used to guard the passage, the thimble shall be not less than how much larger in diameter than the metal pipe?
- A. 12 inches
- B. 6 inches
- C. 4 inches
- D. 2 inches
Correct Answer: D
Per IFGC 2015, Section 503.7.7, Item 1, for listed appliances with draft hoods and appliances listed for use with Type B gas vents the thimble must be at least 4 inches larger in diameter than the pipe; however, where there is a run of not less than 6 feet of metal pipe in the open between the draft hood outlet and the thimble, the thimble is permitted to be not less than 2 inches larger in diameter. The 6-inch figure applies to unlisted appliances with draft hoods and the 12-inch figure to residential and low-heat appliances.
Reference: IFGC 2015 Section 503.7.7
Sample 3 — Vents
Question: A commercial building's vent system uses air admittance valves at most fixture groups, but one dry vent must extend to the outdoors from the building drain. That required outdoor vent extension is sized on the basis of which of the following?
- A. Developed length of the longest branch vent in the building
- B. One-half the diameter of the building sewer at the property line
- C. Total fixture units carried by the most distant drainage stack
- D. Required size of the building drain being served
Correct Answer: D
Per IPC 2015 Section 904.1.2, the required vent extending to the outdoors shall be sized in accordance with Section 906.2 based on the required size of the building drain. Section 904.1.1 also requires it to be a dry vent connected to the building drain or an extension thereof, and it may not be an island fixture vent.
Reference: IPC 2015 Section 904.1.2
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 3 minutes per question.
- After each attempt, look up each missed question's reference and read the section.
| Questions | 80 questions |
| Time limit | 4 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.