Kansas City, MO Master Plumber with Gas Exam (ICC G27, 2018 IFGC/IPC) Practice Exam
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- 100 questions (same as real exam)
- 240 minute time limit
- 8 topic areas covered
- 421 questions in pool
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Kansas City, MO Master Plumber with Gas (ICC G27, 2018 IFGC/IPC) Practice Exam Guide
What's on the exam
Questions per topic, out of 100This practice exam follows the official content outline for the Kansas City, MO Master Plumber with Gas (ICC G27, 2018 IFGC/IPC) exam: Administration and 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 100 questions on a 4 hours clock, with a new draw from our question bank each attempt.
Administration and General Regulations 36 items
Our study plan for this topic: General Installation Requirements; Code Definitions and Terms; Plan Reading; Testing; Materials; Permits and permit applications; Inspections and inspection types; Code official authority and duties.
Plumbing Fixtures 13 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 Standards; Flushing Devices for Water Closets and Urinals.
Water Supply and Distribution 9 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 Requirements by Pipe Material; Fixture Supply Pipe Sizing and Flow Rate Requirements; Hot Water Supply System Requirements and Temperature Controls; Valve Installation Requirements and Locations.
Sanitary Drainage 8 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 joints and connection methods by material type; Slope, sizing, and fixture unit load calculations for drainage systems; Cleanout requirements, placement, spacing, and access; Drainage fittings, changes in direction, and prohibited connections.
Plumbing Vent Requirements 6 items
Our study plan for this topic: Vent Connections and Grades; Vent Terminals; Vent Pipe Sizing and Developed Length; Types of Venting Methods (Individual, Common, Wet, Circuit, Combination, Island, Single-Stack); Air Admittance Valves; Trap Seal Protection and Fixture Trap Distance from Vent; Vent Stack and Stack Vent Requirements; Relief Vents for Multi-Story Stacks.
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 limits; Grease interceptor sizing and capacity requirements; Oil separator design and capacity requirements; Sand interceptors and specialty interceptors (clothes washers, bottling, slaughterhouses).
Storm Drainage 2 items
Our study plan for this topic: Storm Drainage; Sizing of vertical conductors, leaders, and horizontal storm drains using 100-year rainfall rate tables; Primary and secondary (emergency overflow) roof drain requirements and scupper sizing; Prohibited connections and disposal requirements for storm water; Approved materials for inside conductors, underground storm drain pipe, building storm sewer pipe, and subsoil drain pipe; Roof drain installation requirements and flow rate calculations for system sizing; Storm drain traps: when required, sizing, material, and cleanout requirements; Siphonic roof drainage system design standards.
Gas Piping 21 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 grounding requirements; Pipe sizing methods and sizing tables (longest length, branch length, hybrid pressure); Permitted piping materials, tubing standards, and fitting types; Pressure testing procedures, test medium, duration, and leak detection.
Sample 1 — Administration and General Regulations
Question: You are piping the condensate drain from a condensing gas-fired appliance to an approved disposal point. The condensate piping must maintain a horizontal slope in the direction of discharge of not less than:
- A. 1/8 unit vertical in 12 units horizontal (1-percent slope)
- B. 1/2 unit vertical in 12 units horizontal (4-percent slope)
- C. 1/16 unit vertical in 12 units horizontal (0.5-percent slope)
- D. 1/4 unit vertical in 12 units horizontal (2-percent slope)
Correct Answer: A
IPC 314.1 requires liquid combustion byproducts of condensing appliances to be collected and discharged through corrosion-resistant piping not smaller than the appliance drain connection, maintaining a horizontal slope in the direction of discharge of not less than one-eighth unit vertical in 12 units horizontal (1-percent slope).
Reference: IPC 2018 Section 314.1 — Fuel-Burning Appliances (Chapter 3 General Regulations)
Sample 2 — Gas Piping
Question: You are a journeyman plumber called to purge a new gas piping system that operates at 3 psig. You plan to vent the purged gases indoors through an appliance burner. Is this acceptable?
- A. No — piping systems with a design operating gas pressure greater than 2 psig must be purged outdoors
- B. Yes, as long as a combustible gas detector is used at the point of discharge
- C. Yes, as long as the burner has a continuous source of ignition
- D. Yes, if the total piping volume is less than 10 cubic feet
Correct Answer: A
Per IFGC Section 406.7.1, piping systems with a design operating gas pressure greater than 2 psig are required to be purged outdoors. Indoor purging is only allowed for systems at 2 psig or less that also do not meet the size and length criteria of Table 406.7.1.1.
Reference: IFGC 2018 Section 406.7.1
Sample 3 — Plumbing Fixtures
Question: Lavatories shall be provided with waste outlets having a diameter of not less than:
- A. 1 1/2 inches
- B. 1 1/4 inches
- C. 1 inch
- D. 2 inches
Correct Answer: B
Per IPC 2018 Section 419.3, lavatories shall have waste outlets not less than 1 1/4 inches in diameter, with a strainer, pop-up stopper, crossbar or other device to restrict the clear opening. The 1 1/2-inch minimum applies to sinks, laundry trays and showers.
Reference: IPC 2018 Chapter 4 — Section 419.3 Lavatory Waste Outlets
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, a minimum score of 70, 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 24 seconds per question.
- After each attempt, look up each missed question's reference and read the section.
| Questions | 100 questions |
| Time limit | 4 hours |
| Passing score | a minimum score of 70 |
| Books in the exam room | Open book |
| Exam fee | $115 |
- Results for electronically administered examinations are available immediately after the exam is completed.
- You must wait 10 days before retaking a failed exam.
Source: Kansas City, Missouri Examination Information Bulletin (ICC Contractor/Trades), PUBLISHED November 10, 2025. Check the bulletin before test day: fees and rules can change.