Nevada Plumbing And Heating Contractor (C-1) Exam Book Package

Prepare for the Nevada Plumbing And Heating Contractor (C-1) examination with a comprehensive exam book package covering plumbing, mechanical systems, fire sprinklers, fuel gas, LP-Gas, hydronic heating, safety, solar water heating, plumbing mathematics, welding, industrial piping, and refrigeration-related trade knowledge. This package combines the code books allowed into the examination with supplemental study references that support the broader C-1 trade scope.

The Nevada C-1 Plumbing and Heating Contractor examination is an open-book test. The exam-room-approved references in this package are the Uniform Plumbing Code, 2018, Uniform Mechanical Code, 2018, NFPA 13: Installation of Sprinkler Systems, 2019, NFPA 54 - Standard for National Fuel Gas Code, 2012, and NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014.

The package also includes several study-only references that are not allowed into the examination: Code of Federal Regulations - 29 CFR Part 1926 (OSHA), Modern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022, Solar Water and Pool Heating Design and Installation Manual, Mathematics for Plumbers and Pipefitters 2013, 8th edition, Modern Welding, 2013, Facility Piping Systems Handbook (USED), and Modern Refrigeration and Air Conditioning, 22nd edition.

The C-1 examination contains 120 questions, allows 5 hours for completion, and requires 84 correct answers to pass. The exam is broad because a Nevada C-1 license permits work across the C-1 plumbing and heating subclassifications, including plumbing, boilers, fire sprinklers, pipe and duct insulation, sheet metal, heating and cooling systems, gas piping and vents, water heaters, chilled-water piping, firefighter breathing-air systems, and industrial piping.

With 120 questions covering more than twenty subject areas, successful preparation requires more than memorizing isolated rules. Candidates should understand the trade, know which reference applies to a question, practice calculations, and develop efficient code-navigation skills before exam day.

What You Get

• Uniform Plumbing Code, 2018 — exam-room reference for plumbing systems, water supply, drainage, venting, fixtures, backflow, traps, storm drainage, and related requirements.
• Uniform Mechanical Code, 2018 — exam-room reference supporting mechanical systems, hydronics, heating, cooling, piping, equipment, venting, and related requirements.
• NFPA 13: Installation of Sprinkler Systems, 2019 — exam-room reference supporting fire sprinkler system requirements.
• NFPA 54 - Standard for National Fuel Gas Code, 2012 — exam-room reference for natural gas piping, appliance installation, venting, combustion air, testing, and sizing.
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014 — exam-room reference for LP-Gas piping, containers, regulators, installation, and safety.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA) — study-only construction safety reference.
• Modern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022 — study-only hydronic heating reference.
• Solar Water and Pool Heating Design and Installation Manual — study-only solar heating reference.
• Mathematics for Plumbers and Pipefitters 2013, 8th edition — study-only trade mathematics reference.
• Modern Welding, 2013 — study-only welding reference.
• Facility Piping Systems Handbook (USED) — study-only industrial and facility piping reference.
• Modern Refrigeration and Air Conditioning, 22nd edition — study-only heating, cooling, refrigeration, and mechanical systems reference.

Exam Details

The Nevada C-1 Plumbing and Heating Contractor examination contains 120 questions. Candidates are allowed 5 hours to complete the examination and must answer 84 questions correctly to pass.

The examination content is divided into the following subject areas:

• Boilers: 4 questions
• Gas Systems: 8 questions
• Cleanouts: 4 questions
• Fixtures and Equipment: 4 questions
• Hydronics: 3 questions
• Water Heaters/Venting: 6 questions
• Piping, Valves, and Controls: 3 questions
• Sheet Metal: 3 questions
• Water Supply: 8 questions
• Hangers and Supports: 5 questions
• Drain, Waste, and Vents: 10 questions
• Backflow: 4 questions
• Traps and Interceptors: 8 questions
• Isometric Analysis/Plumbing Mathematics: 8 questions
• Safety: 5 questions
• Joints and Connections: 4 questions
• Solar: 4 questions
• General Plumbing Requirements: 7 questions
• Fire Sprinklers: 5 questions
• Storm Drainage: 5 questions
• Industrial Piping: 3 questions
• Breathing Systems for Firefighters: 3 questions
• Chilled Water Piping: 6 questions

Drain, Waste, and Vents is the largest individual category with 10 questions. Gas Systems, Water Supply, Traps and Interceptors, and Isometric Analysis/Plumbing Mathematics each contribute 8 questions. Candidates should give these high-weight areas substantial attention while still preparing across the entire C-1 scope.

Open Book Test

The Nevada C-1 Plumbing and Heating Contractor examination is an open-book test.

The following references in this package are allowed into the examination:

• Uniform Plumbing Code, 2018
• Uniform Mechanical Code, 2018
• NFPA 13: Installation of Sprinkler Systems, 2019
• NFPA 54 - Standard for National Fuel Gas Code, 2012
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014

The remaining references in this package are study-only materials and are not allowed into the examination room.

Candidates should practice with the approved code books long before exam day. With five different exam-room references and 120 questions, it is important to recognize which book is most likely to contain the information needed for a particular topic.

The Uniform Plumbing Code supports core plumbing subjects, while the Uniform Mechanical Code supports mechanical, heating, cooling, and related system questions. NFPA 13 supports fire sprinkler questions, NFPA 54 supports natural gas and fuel-gas systems, and NFPA 58 supports LP-Gas systems.

Approved reference books may be highlighted, underlined, and indexed before the examination. Permanent tabs may be used. Temporary tabs are not permitted, and candidates should not add written notes or loose or attached papers to approved exam references.

Licensing Steps

1. Confirm the C-1 classification. Make sure Nevada Plumbing and Heating Contracting matches the full scope of work the business intends to perform.
2. Identify the qualifying individual. The contractor application must designate the person responsible for meeting the applicable trade qualification requirements.
3. Document qualifying experience. Prepare the required experience information for the classification.
4. Submit the Nevada contractor license application. Complete the applicable application and supporting documentation.
5. Receive examination eligibility. After qualification information is reviewed, the qualifying individual can proceed with the applicable examinations.
6. Prepare for the C-1 trade examination. Study plumbing, mechanical systems, boilers, fire sprinklers, hydronics, gas, chilled-water piping, industrial piping, safety, and related topics.
7. Practice reference navigation. Work regularly with the UPC, UMC, NFPA 13, NFPA 54, and NFPA 58.
8. Prepare for Nevada Business and Law. Contractor applicants must also satisfy the applicable business and law examination requirement unless an authorized waiver applies.
9. Complete the required examinations. Take the applicable trade and business examinations.
10. Complete remaining licensing requirements. Finish the additional requirements associated with issuance of the Nevada contractor license.

State Requirements

Nevada's C-1 Plumbing and Heating Contracting classification is a broad specialty license. A person holding the primary C-1 classification may perform work authorized under the C-1 subclassifications.

The scope includes boilers and hot-water or steam piping with related fittings, valves, gauges, pumps, radiators, tanks, fuel-oil lines, chimneys, flues, and associated work. It also includes fire sprinkler systems and insulation of pipes and ducts.

C-1 work also extends to plumbing systems providing safe water, sanitary waste and venting, roof drainage, hydronic heating systems within the applicable classification scope, landscape irrigation, potable-water heating systems including solar equipment, and gas supply systems.

The classification further reaches into sheet metal fabrication and installation, heating and evaporative cooling systems, gas pipes and vents, water heaters, chilled-water piping, firefighter breathing-air systems, and industrial piping used to transport water, steam, gas, chemicals, food, and other substances.

Because the primary C-1 classification covers such a wide range of work, the examination is considerably broader than a plumbing-only test. Candidates should prepare for both plumbing and mechanical construction along with specialized subjects such as fire sprinklers, industrial piping, hydronics, refrigeration-related systems, welding, and safety.

Reference Books

• Uniform Plumbing Code, 2018
  This exam-room reference supports preparation involving water supply, drainage, waste and vent systems, fixtures, cleanouts, traps, backflow, storm drainage, joints, and general plumbing requirements.
• Uniform Mechanical Code, 2018
  This exam-room reference supports heating, cooling, mechanical equipment, hydronic systems, ventilation, piping, appliances, and other mechanical requirements relevant to the C-1 scope.
• NFPA 13: Installation of Sprinkler Systems, 2019
  This exam-room reference supports preparation for fire sprinkler system installation, components, spacing, piping, protection, and related requirements.
• NFPA 54 - Standard for National Fuel Gas Code, 2012
  This exam-room reference supports natural gas piping, sizing, regulators, appliances, combustion air, venting, testing, and fuel-gas installation requirements.
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014
  This exam-room reference supports LP-Gas piping, containers, regulators, clearances, protection, installation, and related safety requirements.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  This study-only reference supports construction safety preparation involving personal protective equipment, ladders, excavation, tools, electrical hazards, material handling, and other jobsite concerns.
• Modern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022
  This study-only reference supports hydronic heating preparation involving pumps, piping arrangements, heat emitters, controls, system design, and heating-system operation.
• Solar Water and Pool Heating Design and Installation Manual
  This study-only reference supports solar heating systems, components, circulation, storage, design concepts, and installation practices.
• Mathematics for Plumbers and Pipefitters 2013, 8th edition
  This study-only reference supports measurements, formulas, geometry, pipe calculations, isometric analysis, and practical plumbing and pipefitting mathematics.
• Modern Welding, 2013
  This study-only reference supports welding processes, joint preparation, equipment, techniques, safety, and practical welding knowledge.
• Facility Piping Systems Handbook (USED)
  This study-only reference supports industrial and facility piping preparation involving piping systems, components, materials, valves, equipment, and system applications.
• Modern Refrigeration and Air Conditioning, 22nd edition
  This study-only reference supports heating, cooling, refrigeration, mechanical systems, components, controls, and system-operation concepts.

Exam Room Approved Books

• Uniform Plumbing Code, 2018
  Approved for use during the Nevada C-1 examination for applicable plumbing requirements.
• Uniform Mechanical Code, 2018
  Approved for use during the examination for applicable mechanical and heating-system requirements.
• NFPA 13: Installation of Sprinkler Systems, 2019
  Approved for use during the examination for fire sprinkler questions.
• NFPA 54 - Standard for National Fuel Gas Code, 2012
  Approved for use during the examination for applicable natural gas and fuel-gas requirements.
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014
  Approved for use during the examination for applicable LP-Gas requirements.

Test Information and Study Materials

A productive Nevada C-1 study plan should divide preparation into major systems rather than attempting to read every reference from beginning to end.

Drain, Waste, and Vent Systems should receive substantial attention. Review drainage sizing, slope, vents, fixture units, cleanouts, traps, interceptors, and sanitary-system requirements using the Uniform Plumbing Code.

Water Supply preparation should include sizing, pressure, materials, valves, backflow protection, supports, distribution, and system protection. Candidates should practice locating applicable UPC tables quickly.

Gas Systems should be studied with NFPA 54 and NFPA 58. Learn how natural gas and LP-Gas systems differ and practice selecting the correct reference before beginning a lookup.

Fire Sprinklers should be studied with NFPA 13. Focus on sprinkler systems, piping, components, spacing concepts, and installation requirements relevant to the C-1 examination.

Hydronics and Boilers should include heating-system components, pumps, valves, piping, heat transfer, controls, and boiler-related knowledge. The UMC and Modern Hydronic Heating reference can be used together during preparation.

Chilled Water Piping accounts for 6 questions. Candidates should review piping materials, valves, pumps, supports, insulation considerations, and system-operation concepts associated with chilled-water distribution.

Plumbing Mathematics and Isometric Analysis accounts for 8 questions. Practice pipe calculations, dimensions, elevations, geometry, offsets, areas, volumes, and plan interpretation until the steps become familiar.

Industrial Piping should include system materials, valves, equipment, supports, joining methods, and piping used for water, steam, gas, chemicals, food, and other industrial substances.

Safety should be learned before test day because the OSHA reference is not allowed into the examination. Use the study reference to strengthen knowledge of jobsite hazards, protective equipment, tools, excavation, and general construction safety.

Welding knowledge can support industrial and mechanical piping preparation. Review joint preparation, welding methods, equipment, workmanship, and safe procedures using Modern Welding.

Heating, Cooling, and Refrigeration concepts should also be part of the study plan because the C-1 classification includes heating and air-circulation work. Modern Refrigeration and Air Conditioning can support this broader mechanical review.

Reference navigation should be practiced under timed conditions. Choose a question, identify whether it belongs in the UPC, UMC, NFPA 13, NFPA 54, or NFPA 58, and then locate the applicable provision. The ability to choose the correct book quickly can save as much time as knowing how to use the index.

With 120 questions in five hours, pacing matters. Candidates should avoid spending excessive time on one code lookup. If a question is taking too long, move forward and return later if time remains.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Nevada C-1 Plumbing and Heating Contractor candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation, and confidence-building study structure.

The C-1 exam covers an unusually broad range of plumbing and mechanical subjects. 1 Exam Prep helps candidates organize that material into practical study areas so plumbing, gas, fire sprinklers, hydronics, industrial piping, chilled water, solar, safety, and mechanical systems can be reviewed systematically.

The five exam-room references support code-navigation practice. Candidates can work with the UPC, UMC, NFPA 13, NFPA 54, and NFPA 58 during preparation and build familiarity with the major sections, tables, definitions, and indexes they may need on exam day.

The study-only references provide additional depth in subjects such as hydronics, plumbing mathematics, safety, solar heating, welding, industrial piping, refrigeration, and air-conditioning. These materials can be used to build knowledge that must be retained because the books are not available during the trade examination.

1 Exam Prep encourages candidates to combine reading with practice questions, calculations, active recall, and timed reference-navigation exercises. When a question is missed, determine whether the difficulty came from a trade-knowledge gap, a calculation issue, or trouble locating the correct reference.

The goal is to help candidates approach the Nevada C-1 Plumbing and Heating Contractor examination with stronger trade knowledge, better code-navigation skills, more efficient calculations, and a structured study strategy without guaranteeing a passing score or licensing approval.

How many questions are on the Nevada C-1 Plumbing and Heating exam?

The Nevada C-1 examination contains 120 questions.

How much time is allowed for the C-1 exam?

Candidates are allowed 5 hours to complete the examination.

How many correct answers are required to pass?

Candidates must answer 84 questions correctly to pass the C-1 trade examination.

Is the Nevada C-1 examination open book?

Yes. The Nevada C-1 Plumbing and Heating Contractor examination is an open-book test.

Which books are allowed into the C-1 exam?

The Uniform Plumbing Code 2018, Uniform Mechanical Code 2018, NFPA 13 2019, NFPA 54 2012, and NFPA 58 2014 are the exam-room references included in this package.

Is OSHA 29 CFR Part 1926 allowed into the exam?

No. OSHA 29 CFR Part 1926 is included for study but is not allowed into the C-1 trade examination.

Is Modern Hydronic Heating allowed into the exam?

No. Modern Hydronic Heating is included as a study reference and is not allowed into the examination.

Is Mathematics for Plumbers and Pipefitters allowed into the exam?

No. It is a study-only reference used to strengthen plumbing mathematics and isometric-analysis preparation.

Does the C-1 exam include fire sprinkler questions?

Yes. Fire Sprinklers accounts for 5 questions, and NFPA 13, 2019 is included as an exam-room reference.

Does the examination include chilled-water piping?

Yes. Chilled Water Piping accounts for 6 questions.

Does the exam include plumbing mathematics?

Yes. Isometric Analysis and Plumbing Mathematics accounts for 8 questions.

Does the C-1 exam include industrial piping?

Yes. Industrial Piping is included in the examination outline and reflects the broad scope of the C-1 classification.

How should I study with five exam-room code books?

Practice identifying which reference applies to each subject before beginning a lookup. Use timed questions and repeated navigation drills so you can move efficiently among the UPC, UMC, NFPA 13, NFPA 54, and NFPA 58.

Should I try to look up every answer during the exam?

No. Build strong trade knowledge first and use the approved references strategically when a specific rule, table, definition, or code section needs to be confirmed.

Does this package guarantee that I will pass the Nevada C-1 exam?

No. This package provides technical references designed to support organized preparation. Examination results depend on each candidate's experience, knowledge, study, calculation ability, reference-navigation skills, and performance on test day.