Kansas Journeyman Mechanical Exam (ICC KGG, 2018 IMC/IFGC) Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
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- A new mix each time
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Full Practice Exam
Complete exam simulation matching the real Pearson VUE test format.
- 50 questions (same as real exam)
- 180 minute time limit
- 7 topic areas covered
- 204 questions in pool
- Detailed explanations
Texts preferred · 9am–9pm Central
Kansas Journeyman Mechanical (ICC KGG, 2018 IMC/IFGC) Practice Exam Guide
What's on the exam
Questions per topic, out of 50This practice exam follows the official content outline for the Kansas Journeyman Mechanical (ICC KGG, 2018 IMC/IFGC) exam: Administration General Regulations, Appliances & Mechanical Equipment, Exhaust and Ventilation Systems, Duct Systems, Combustion Air, Chimneys and Vents, Gas Piping and Fuel Supply Systems.
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 50 questions on a 3 hours clock, with a new draw from our question bank each attempt.
Administration General Regulations 11 items
Our study plan for this topic: General Installation Requirements; Plan Reading; Permits and permit applications; Inspections and testing requirements; Code official duties and authority; Violations, stop work orders, and penalties; Means of appeal and board of appeals; Definitions of key mechanical code terms.
Appliances & Mechanical Equipment 11 items
Our study plan for this topic: Heating Equipment & Gen App Installation; Water Heaters and Boilers; Cooling and Refrigeration Systems; Hydronic and Other Systems; Refrigerant Classification & Safety Groups (ASHRAE 34 toxicity/flammability ratings); Machinery Room Requirements (construction, ventilation rates, refrigerant detectors, emergency controls); Refrigerant Piping Materials, Joints & Stop Valves; Maximum Allowable Refrigerant Quantities by Occupancy.
Exhaust and Ventilation Systems 7 items
Our study plan for this topic: Exhaust Fan & Product Conveying Systems; Commercial Hoods & Kitchen Ventilation; Clothes Dryer Exhaust Systems; Makeup Air Requirements for Exhaust Systems; Hazardous Exhaust Systems; Smoke Control Systems; Exhaust Discharge Location & Outlet Clearances; Mechanical Ventilation Rates by Occupancy.
Duct Systems 8 items
Our study plan for this topic: Duct Construction, Installation & Plenums; Smoke and Fire Dampers; Return Air System Requirements and Restrictions; Duct Insulation, Coverings, and Vapor Retarders; Air Filters in Duct Systems; Smoke Detection Systems for Air Distribution; Flexible Duct and Flexible Air Connector Requirements; Underground and Exterior Duct Installation.
Combustion Air 4 items
Our study plan for this topic: Venting of Fuel Burning Appliances; Indoor combustion air volume requirements (standard method and known air-infiltration-rate method); Outdoor combustion air opening methods (two-permanent-openings and one-permanent-opening); Combustion air opening sizing for louvers, grilles, and screens; Combustion air duct requirements and installation restrictions; Combination indoor and outdoor combustion air method; Mechanical combustion air supply systems and appliance interlock requirements; Makeup air provisions for exhaust fans and ventilation interference.
Chimneys and Vents 5 items
Our study plan for this topic: Venting of Fuel Burning Appliances; Chimney and Vent Connectors; Appliance venting categories and vent type selection (Table 503.4 / Table 802.2); Vent and chimney termination height and location requirements; Sizing of Category I appliance venting systems using tables (Section 504); Masonry chimney requirements including flue lining materials and cleanouts; Factory-built chimney listing, installation, and support requirements; Draft hoods, draft controls, and automatically operated vent dampers.
Gas Piping and Fuel Supply Systems 4 items
Our study plan for this topic: Fuel Supply Installation, Testing and Sizing; Approved piping materials and tubing types (steel, copper, CSST, polyethylene, aluminum); Piping joints, fittings, and connection methods; Prohibited piping locations and installation restrictions; Underground piping installation, burial depth, and corrosion protection; Shutoff valves and pressure regulators; Overpressure protection devices and pressure limitations; Piping support intervals and spacing requirements.
Sample 1 — Administration General Regulations
Question: For a refrigerant having a heat of combustion of less than 8,169 Btu/lb, flammability Class 2 applies only where the lower flammability limit (LFL) at 140°F and 14.7 psia is more than which value?
- A. 0.00625 pound per cubic foot
- B. 0.000625 pound per cubic foot
- C. 0.625 pound per cubic foot
- D. 0.0625 pound per cubic foot
Correct Answer: A
IMC 2018, Section 202, 'FLAMMABILITY CLASSIFICATION': Class 2 refrigerants have an LFL of more than 0.00625 lb/ft³ (0.10 kg/m³) at 140°F and 14.7 psia and a heat of combustion less than 8,169 Btu/lb. At or below that LFL, the refrigerant is Class 3.
Reference: IMC 2018 Section 202 — Flammability Classification
Sample 2 — Appliances & Mechanical Equipment
Question: You are a journeyman plumber performing a safety inspection of an existing gas water heater. After verifying there are no unsafe conditions, you measure the CO in the vent after 5 minutes of main burner operation. What is the maximum acceptable CO threshold for a water heater?
- A. 200 ppm air free
- B. 225 ppm as measured
- C. 25 ppm as measured
- D. 400 ppm air free
Correct Answer: A
Per IFGC Appendix D, Table D.6, the CO threshold for a water heater is 200 ppm air free.
Reference: IFGC 2018 Appendix D, Table D.6
Sample 3 — Duct Systems
Question: A return air riser serves three stories of an office building. Smoke detectors must be installed at each story, upstream of the connection between the riser and any air ducts or plenums, where the return air system served has a design capacity greater than:
- A. 2,000 cfm
- B. 10,000 cfm
- C. 25,000 cfm
- D. 15,000 cfm
Correct Answer: D
IMC 2018 Section 606.2.3 requires smoke detectors at each story where return air risers serve two or more stories and serve any portion of a return air system having a design capacity greater than 15,000 cfm. The 2,000 cfm figure in Section 606.2.1 applies to return air systems generally, not to the per-story riser requirement.
Reference: IMC 2018 Chapter 6 — Sections 606.2.1 and 606.2.3
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 75, 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 36 seconds per question.
- After each attempt, look up each missed question's reference and read the section.
| Questions | 50 questions |
| Time limit | 3 hours |
| Passing score | a minimum score of 75 |
| Books in the exam room | Open book |
| Exam fee | $115 |
- Results for examinations taken electronically are available immediately after completion of the examination.
- You must wait 10 days before retaking a failed exam.
Source: State of Kansas Contractor/Trades Examination Information Bulletin, PUBLISHED August 20, 2026 (page headers read "December 9, 2025"). Check the bulletin before test day: fees and rules can change.