ICC Journeyman Mechanical - G31-N Exam Book Package

The ICC Journeyman Mechanical - G31-N Exam Book Package is designed for candidates preparing for the ICC National Standard Journeyman Mechanical exam using two important code references: the International Mechanical Code, 2018 and the International Fuel Gas Code, 2018. This package supports study for mechanical trade topics, including general mechanical requirements, appliances and equipment, exhaust and ventilation systems, duct systems, combustion air, chimneys and vents, fuel gas piping, fuel supply systems, and special mechanical requirements.

Journeyman mechanical exam preparation requires more than field experience. A mechanical professional may understand equipment installation, ductwork, venting, fuel gas piping, combustion air, exhaust systems, appliance connections, and jobsite practices, but an ICC contractor/trade exam requires candidates to apply that knowledge through code-based questions. Candidates must be able to read each question carefully, identify the correct reference, locate the applicable section, and apply the rule accurately under timed exam conditions.

This book package gives candidates the references needed to study mechanical code and fuel gas code requirements together. The International Mechanical Code, 2018 supports study of mechanical system installation, ventilation, exhaust systems, duct systems, equipment requirements, refrigeration-related provisions, controls, and general mechanical safety requirements. The International Fuel Gas Code, 2018 supports study of fuel gas piping, combustion air, chimneys, vents, appliance installation, gas utilization equipment, and related fuel gas safety provisions.

The ICC Journeyman Mechanical - G31-N exam is associated with journeyman-level mechanical trade knowledge. Candidates preparing for this exam should be comfortable with mechanical terminology, code organization, equipment installation, fuel gas requirements, combustion air, chimneys, vents, duct construction, ventilation, exhaust, appliance location, clearances, and safety-related code provisions. This package is useful for mechanical journeyman candidates, HVAC professionals, mechanical installers, service technicians, supervisors, and trade professionals preparing for the G31-N exam.

What You Get

• International Mechanical Code, 2018 — A mechanical code reference used to study general mechanical regulations, equipment and appliance requirements, ventilation, exhaust systems, duct systems, chimneys, vents, refrigeration-related provisions, hydronic piping, and system installation requirements.
• International Fuel Gas Code, 2018 — A fuel gas code reference used to study gas piping systems, fuel supply, combustion air, chimneys and vents, appliance installation, gas utilization equipment, shutoff valves, connectors, clearances, and fuel gas safety provisions.

This two-book package helps candidates prepare across the major areas of the G31-N Journeyman Mechanical exam. The IMC supports mechanical system study, while the IFGC supports fuel gas system study. Together, these references help candidates build stronger code navigation skills and a better understanding of the requirements used in mechanical installation and service work.

Exam Details

The ICC Journeyman Mechanical - G31-N exam is part of the ICC Contractor/Trades examination program. The National Standard Journeyman Mechanical exam is listed as an open-book exam with 50 multiple-choice questions and a 3-hour time limit. Candidates preparing for this exam should focus on both mechanical trade knowledge and efficient reference use.

The exam content includes general requirements, appliances and equipment, exhaust and ventilation systems, duct systems, combustion air, chimneys and vents, fuel supply systems, special requirements, and electrical-related mechanical topics. These categories reflect the working knowledge expected from journeyman mechanical candidates who install, service, or support mechanical and fuel gas systems.

General requirements may include code administration, equipment access, equipment location, installation requirements, clearances, identification, safety provisions, and general mechanical code responsibilities. Candidates should understand how the IMC organizes mechanical installation rules and how general provisions apply before moving into equipment-specific sections.

Appliances and equipment may include mechanical equipment installation, appliance requirements, air-conditioning equipment, heating equipment, clearances, access, support, condensate, connections, and equipment safety. Candidates should be comfortable finding equipment rules quickly and applying requirements to practical installation conditions.

Exhaust and ventilation systems may include mechanical ventilation, outdoor air, exhaust discharge, kitchen exhaust, clothes dryer exhaust, hazardous exhaust concepts, environmental air ducts, and system termination requirements. Ventilation questions often require careful reading because requirements can change depending on the space, appliance, occupancy, or system type.

Duct systems may include duct construction, materials, installation, supports, insulation, joints, openings, plenums, fire and smoke dampers, and duct-related safety provisions. Duct questions may require candidates to understand both system performance and code requirements for safe installation.

Combustion air, chimneys, and vents are important study areas because fuel-burning appliances must be installed with proper air supply and safe venting. Candidates should study combustion air openings, air supply methods, vent sizing concepts, vent materials, vent connectors, appliance categories, draft requirements, clearances, terminations, and chimney or vent installation requirements.

Fuel supply systems may include gas piping, sizing concepts, materials, joints, valves, appliance connections, pressure testing, regulators, connectors, shutoff valves, and installation limitations. Candidates should be comfortable moving through the International Fuel Gas Code to locate fuel gas requirements and apply them to mechanical installation scenarios.

The G31-N exam may be accepted differently by different licensing authorities. A city, county, state, municipality, or local agency may determine whether this exam is required for a specific mechanical journeyman license classification. Passing an ICC exam does not automatically create a license unless the applicable authority recognizes the exam as part of its licensing process.

Open Book Test

The ICC Journeyman Mechanical - G31-N exam is an open-book test. Open-book testing allows candidates to use approved references during the exam, but it does not remove the need for focused preparation. Candidates must know how to navigate the International Mechanical Code and International Fuel Gas Code efficiently, identify which reference applies to the question, and locate the correct requirement without losing time.

Open-book mechanical exams reward candidates who understand code organization. Candidates should become familiar with the table of contents, indexes, chapter layouts, definitions, general requirements, equipment chapters, duct sections, ventilation sections, combustion air provisions, venting chapters, fuel gas piping sections, and appliance installation rules. The goal is not simply to bring books into the exam room. The goal is to know how to use the books quickly and accurately.

The International Mechanical Code, 2018 is especially useful for mechanical system installation requirements, including equipment, ventilation, exhaust, ducts, chimneys, vents, hydronic piping, and general mechanical safety. The International Fuel Gas Code, 2018 is especially useful for fuel gas piping, combustion air, appliance installation, gas utilization equipment, pressure testing, shutoff valves, and venting requirements.

During study, candidates should practice deciding which reference applies before searching for an answer. A question involving duct systems, ventilation, or mechanical equipment may belong in the IMC. A question involving gas piping, combustion air for gas appliances, or gas appliance installation may belong in the IFGC. Strong reference-selection habits help candidates avoid losing time in the wrong book.

Exam-day reference rules may control which books are allowed, how books may be marked, whether tabs are permitted, whether notes are allowed, and what condition books must be in. Candidates should follow the current testing rules for the G31-N exam and the requirements of the jurisdiction connected to their license.

Licensing Steps

The ICC Journeyman Mechanical - G31-N exam may be used by a city, county, state, municipality, local board, or licensing authority as part of a mechanical journeyman qualification process. ICC administers contractor and trade exams, but licensing approval is controlled by the agency that issues or recognizes the license.

A typical licensing path may include identifying the correct mechanical license classification, confirming that the G31-N exam is required, reviewing the approved reference books, completing an application, receiving preauthorization when required, scheduling the exam, passing the exam, and submitting final licensing documents to the applicable authority. Depending on the jurisdiction, additional requirements may include work experience documentation, employer verification, apprenticeship documentation, local registration, continuing education, insurance, bonding, or renewal compliance.

Candidates should begin by identifying the agency that controls mechanical licensing in the location where they plan to work. That agency determines the correct exam, accepted score, required documents, application process, fees, license scope, and renewal rules. This G31-N book package supports the study portion of the process. It does not replace licensing applications, agency approvals, insurance certificates, bonding documents, business filings, work experience records, or local registrations.

State Requirements

Mechanical journeyman requirements vary by state and local jurisdiction. Some states regulate mechanical licenses at the state level. Some areas use city, county, or municipal licensing. Other jurisdictions may require local registration, trade exams, business licensing, insurance, bonding, work experience verification, or a combination of requirements before mechanical work may be performed.

Candidates should review the requirements for the exact location where they plan to perform mechanical work. Important items may include the accepted ICC exam code, license classification, application approval, experience documentation, apprenticeship or training requirements, business entity requirements, insurance, bonding, workers’ compensation requirements, local code adoption, permit rules, inspection requirements, continuing education, and renewal deadlines.

This package is focused on the ICC Journeyman Mechanical - G31-N book set and includes the International Mechanical Code, 2018 and International Fuel Gas Code, 2018. Candidates should make sure these references and the G31-N exam match the requirements of the licensing authority before scheduling the exam.

Reference Books

• International Mechanical Code, 2018
  This mechanical code reference supports study of general mechanical regulations, appliances and equipment, ventilation, exhaust systems, duct systems, chimneys and vents, refrigeration-related provisions, hydronic piping, combustion air coordination, installation requirements, access, clearances, and mechanical system safety provisions.
• International Fuel Gas Code, 2018
  This fuel gas code reference supports study of fuel gas piping systems, gas utilization equipment, appliance installation, combustion air, chimneys and vents, vent connectors, shutoff valves, gas connectors, pressure testing, regulators, materials, sizing concepts, and fuel gas safety requirements.

These two references work together because mechanical journeyman candidates often need to understand both mechanical system requirements and fuel gas system requirements. The IMC helps candidates study equipment, ventilation, exhaust, ducts, and general mechanical rules. The IFGC helps candidates study gas piping, fuel supply, combustion air, gas appliances, and venting. A strong preparation routine should include practice using both references so candidates can identify the correct book and section quickly.

Test Information and Study Materials

Journeyman mechanical preparation should be organized around the major exam categories and the way mechanical requirements are arranged in the reference books. Candidates should study general requirements, appliances and equipment, exhaust and ventilation, duct systems, combustion air, chimneys and vents, fuel supply systems, special requirements, and electrical-related mechanical topics. Random reading is less effective than a focused plan that connects each topic to the correct reference.

For the International Mechanical Code, candidates should focus on general regulations, equipment installation, appliance requirements, ventilation, exhaust systems, duct systems, chimneys and vents, hydronic piping, refrigeration-related provisions, access, clearances, and mechanical system safety. Candidates should practice using the IMC index and table of contents to locate common mechanical topics quickly.

For the International Fuel Gas Code, candidates should focus on gas piping systems, fuel supply, pipe sizing concepts, gas connectors, valves, regulators, pressure testing, combustion air, appliance installation, venting, chimneys, vent connectors, clearances, and gas utilization equipment. Fuel gas questions often require careful reading because requirements can change based on appliance type, venting category, location, pressure, material, or installation condition.

Combustion air should receive close attention. Candidates should understand how combustion air supports fuel-burning appliances and how code provisions apply to indoor air, outdoor air, mechanical combustion air, openings, confined spaces, and appliance rooms. Questions in this area may require candidates to locate sizing rules, opening requirements, or installation conditions.

Venting is another important study area. Candidates should review vent connectors, vent materials, draft hood appliances, direct-vent appliances, mechanical draft systems, vent termination, chimney use, clearances, and installation limitations. Venting questions often connect the IMC and IFGC, so candidates should practice identifying which reference applies.

Duct systems and ventilation should also be reviewed carefully. Candidates should study duct materials, supports, joints, insulation, plenums, dampers, return air, environmental air, exhaust discharge, dryer exhaust, kitchen exhaust, and mechanical ventilation requirements. These topics are common in mechanical work and may require candidates to understand both installation details and system safety.

Fuel supply systems should be studied with repeated reference practice. Candidates should review gas piping materials, prohibited locations, pipe sizing concepts, valves, appliance connectors, regulators, pressure testing, sediment traps, and equipment connections. Strong familiarity with the IFGC helps candidates locate fuel gas requirements more efficiently during an open-book exam.

A strong study routine should include timed reference practice. Candidates should practice looking up mechanical terms, locating fuel gas requirements, identifying appliance rules, finding ventilation provisions, reviewing duct system requirements, and answering questions using both books. Open-book exam success depends on more than knowing mechanical work. It depends on using the references efficiently, reading questions carefully, and applying the correct code requirement.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps journeyman mechanical candidates prepare with structure, focus, and practical study direction. Mechanical exams require candidates to understand field work, code language, reference navigation, and system-specific requirements. Many candidates have mechanical experience but need help turning that experience into an exam-ready study plan. 1 Exam Prep supports that process through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation, and confidence-building study structure.

For the ICC Journeyman Mechanical - G31-N exam, candidates need to understand how the International Mechanical Code and International Fuel Gas Code apply to mechanical work. 1 Exam Prep helps students focus on major areas such as general requirements, appliances and equipment, exhaust and ventilation systems, duct systems, combustion air, chimneys and vents, fuel supply systems, and special mechanical requirements.

Reference navigation is especially important for an open-book mechanical exam. Candidates need to know when to use the IMC and when to use the IFGC. A candidate who can quickly identify the correct book and locate the correct section, table, or topic has a stronger exam-day advantage. 1 Exam Prep encourages practical study habits that help candidates become more comfortable using their references, interpreting questions, and applying code requirements.

This book package gives candidates the foundation needed for G31-N preparation. With the International Mechanical Code, 2018 and International Fuel Gas Code, 2018, students can study the major journeyman mechanical code areas and build stronger familiarity with the materials used during exam preparation. 1 Exam Prep helps candidates move toward their mechanical licensing goals with organized review, realistic preparation, and better reference-use habits.

FAQ Section

What books are included in the ICC Journeyman Mechanical - G31-N Book Package?

This package includes the International Mechanical Code, 2018 and the International Fuel Gas Code, 2018.

Is the ICC Journeyman Mechanical - G31-N exam open book?

Yes. The National Standard Journeyman Mechanical exam is listed as an open-book test. Candidates should follow current testing rules for approved references, tabs, markings, notes, and book condition.

How many questions are on the G31-N Journeyman Mechanical exam?

The National Standard Journeyman Mechanical exam is listed with 50 multiple-choice questions.

How much time is allowed for the G31-N exam?

The exam is listed with a 3-hour time limit.

What topics should I study for the G31-N exam?

Important study areas include general requirements, appliances and equipment, exhaust and ventilation systems, duct systems, combustion air, chimneys and vents, fuel supply systems, special requirements, and electrical-related mechanical topics.

Why is the International Fuel Gas Code included?

The International Fuel Gas Code supports study of gas piping, fuel supply, combustion air, appliance installation, chimneys, vents, shutoff valves, connectors, pressure testing, and fuel gas safety requirements.

Does this book package include an online course?

This product is a book package. It includes the listed reference books and does not include online course access unless a separate course product is purchased.

Does passing the ICC G31-N exam automatically give me a mechanical license?

No. Licensing is controlled by the applicable state, city, county, municipality, board, or local authority. The exam may be one part of the licensing process, depending on the jurisdiction.

Who should use this book package?

This package is useful for mechanical journeyman candidates, HVAC professionals, mechanical installers, service technicians, supervisors, and trade professionals preparing for the ICC Journeyman Mechanical - G31-N exam.

How should I study with these books?

Study by topic and reference. Practice locating mechanical requirements in the IMC, fuel gas requirements in the IFGC, and use timed practice to improve lookup speed and exam pacing.