Nevada Plumbing Contractor (C-1D) Exam Book Package

Prepare for the Nevada Plumbing Contractor (C-1D) examination with a comprehensive exam book package covering plumbing systems, fuel gas, LP-Gas, mechanical systems, hydronic heating, plumbing mathematics, construction safety, solar water heating, pipefitting, and welding. This package combines the code books allowed in the examination with additional technical references intended for study before test day.

The package includes the Uniform Plumbing Code, 2018, NFPA 54 - Standard for National Fuel Gas Code, 2012, NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014, and Uniform Mechanical Code, 2012 as exam-room references. It also includes Mathematics for Plumbers and Pipefitters, 8th edition, 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, Pipefitter's Handbook, and Pipe Welding Procedures, 2003 as study references that are not allowed into the trade examination.

The Nevada C-1D Plumbing Contractor exam is an open-book examination. Candidates should develop both plumbing trade knowledge and strong reference-navigation skills. Knowing which code book to use for a particular question can save valuable time when working through plumbing, gas, mechanical, venting, sizing, and installation problems.

The examination contains 80 questions, allows 3 hours for completion, and requires 56 correct answers to pass. The test covers a wide range of plumbing contractor knowledge, including water supply, drainage, waste and vent systems, gas systems, water heaters, hydronics, backflow, traps, cleanouts, plumbing mathematics, safety, solar systems, joints and connections, and storm drainage.

The Nevada C-1D classification itself is broad. It includes sanitary plumbing systems, water supply, waste and vent systems, roof drainage, landscape irrigation, hydronic heating systems not exceeding 200,000 BTUs, potable-water heating systems including solar equipment, gas supply systems, and piping for compressed air, vacuums, and medical gases. This package gives candidates references that support preparation across that wide scope.

What You Get

• Uniform Plumbing Code, 2018 — exam-room reference for plumbing systems, fixtures, water supply, drainage, venting, backflow, traps, storm drainage, testing, and general plumbing requirements.
• NFPA 54 - Standard for National Fuel Gas Code, 2012 — exam-room reference supporting fuel-gas piping, appliances, combustion air, venting, testing, and related gas-system requirements.
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014 — exam-room reference for LP-Gas piping, storage, regulators, containers, installation, and safety.
• Uniform Mechanical Code, 2012 — exam-room reference supporting mechanical systems, hydronic applications, venting, equipment, and related mechanical requirements.
• Mathematics for Plumbers and Pipefitters, 8th edition — study reference for calculations, measurements, pipefitting mathematics, and practical trade arithmetic.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA) — study reference for construction safety.
• Modern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022 — study material for hydronic heating systems, piping, controls, components, and design concepts.
• Solar Water and Pool Heating Design and Installation Manual — study reference for solar water-heating applications and installation principles.
• Pipefitter's Handbook — practical piping, fitting, measurement, layout, and field-reference material.
• Pipe Welding Procedures, 2003 — study material covering pipe welding methods, joint preparation, techniques, and workmanship.

Exam Details

The Nevada C-1D Plumbing Contractor examination contains 80 questions. Candidates receive 3 hours to complete the examination and must answer 56 questions correctly to pass.

The examination content is divided into the following areas:

• Gas Systems: 8 questions
• Cleanouts: 4 questions
• Fixtures and Equipment: 3 questions
• Hydronics: 3 questions
• Water Heaters/Venting: 6 questions
• Piping, Valves, and Controls: 5 questions
• Water Supply: 8 questions
• Hangers and Supports: 4 questions
• Drain, Waste, and Vents: 8 questions
• Backflow: 4 questions
• Traps and Interceptors: 4 questions
• Isometric Analysis/Plumbing Mathematics: 6 questions
• Safety: 5 questions
• Joints and Connections: 3 questions
• Solar: 3 questions
• General Plumbing Requirements: 3 questions
• Storm Drainage: 3 questions

Gas Systems, Water Supply, and Drain, Waste, and Vents are among the largest categories, with eight questions each. Candidates should be comfortable navigating applicable code provisions while understanding the practical installation principles behind each system.

Plumbing mathematics is also important. The exam includes six questions involving isometric analysis and plumbing calculations, so candidates should practice solving trade problems rather than depending solely on code lookups.

Open Book Test

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

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

• Uniform Plumbing Code, 2018
• NFPA 54 - Standard for National Fuel Gas Code, 2012
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014
• Uniform Mechanical Code, 2012

The other books included in this package are study references and are not allowed into the examination.

With 80 questions in three hours, candidates should not plan to search multiple books for every answer. Effective open-book preparation means learning the subject first and then knowing which reference is most likely to contain the applicable requirement.

For example, drainage, water supply, fixtures, cleanouts, traps, backflow, and storm drainage questions will often involve the Uniform Plumbing Code. Fuel-gas questions may require NFPA 54, while LP-Gas topics may lead to NFPA 58. Mechanical or hydronic questions may involve the Uniform Mechanical Code.

Practice should include timed reference navigation. Candidates can select a subject, identify the appropriate book, locate the applicable section or table, and repeat the exercise until the process becomes more efficient.

Licensing Steps

1. Confirm the C-1D classification. Make sure Nevada Plumbing Contractor licensing matches the work the business intends to perform.
2. Identify the qualifying individual. The contractor application must identify the person providing the required experience and trade qualification.
3. Document qualifying experience. The qualifying individual must meet Nevada's applicable experience requirements for the requested classification.
4. Submit the contractor license application. Complete the required application and supporting documentation with the Nevada State Contractors Board.
5. Receive examination eligibility. After the application and qualifications are accepted, proceed with examination scheduling.
6. Prepare for the C-1D trade examination. Study plumbing systems, gas systems, hydronics, solar, calculations, safety, and code navigation.
7. Prepare for Contractor Management Survey requirements. Nevada contractor licensing includes the applicable business and law examination requirement unless an authorized waiver applies.
8. Complete the required examinations. Take the applicable trade and business examinations.
9. Complete remaining licensing requirements. Finish the additional requirements associated with issuance of the Nevada contractor license.

State Requirements

Nevada's C-1D Plumbing classification authorizes installation and maintenance of material and fixtures used to provide sanitary conditions in buildings through a permanent supply of safe water and sanitary waste and vent systems required for proper waste removal.

The classification also includes roof drainage systems, landscape irrigation systems, systems used to heat potable water including solar equipment, and hydronic heating systems not exceeding 200,000 British thermal units.

C-1D work includes a permanent means of supplying gas for residential and industrial purposes, along with piping for compressed air, vacuums, and gases used for medical purposes. The classification also permits applicable water and gas piping between the edge of a building and the utility meter.

For contractor qualification, Nevada generally requires the qualifying individual to have at least four full years of experience at the journeyman, foreman, supervisor, or contractor level within the applicable period before filing the application.

The breadth of the C-1D scope explains why the examination covers plumbing code, fuel gas, LP-Gas, hydronic systems, solar water heating, mathematics, safety, water distribution, drainage, venting, and storm systems.

Reference Books

• Uniform Plumbing Code, 2018
  This exam-room reference supports preparation for general plumbing requirements, water supply, drainage, waste and vent systems, fixtures, cleanouts, backflow protection, traps, interceptors, joints, storm drainage, and plumbing system testing.
• NFPA 54 - Standard for National Fuel Gas Code, 2012
  This exam-room reference supports preparation involving fuel-gas piping, regulators, appliance installation, combustion air, venting, testing, sizing, and gas-system safety requirements.
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014
  This exam-room reference supports preparation involving LP-Gas containers, piping, regulators, installation practices, system protection, and related propane safety requirements.
• Uniform Mechanical Code, 2012
  This exam-room reference supports preparation involving mechanical equipment, hydronic systems, venting, piping, and mechanical-system requirements relevant to the C-1D scope.
• Mathematics for Plumbers and Pipefitters, 8th edition
  This study-only reference supports plumbing arithmetic, measurements, formulas, pipe calculations, elevations, areas, volumes, and trade mathematics used in isometric and sizing problems.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  This study-only reference supports construction safety preparation involving tools, excavation, ladders, personal protective equipment, electrical hazards, material handling, and general jobsite safety.
• Modern Hydronic Heating for Residential and Light Commercial Buildings, John Siegenthaler, P.E., 2022
  This study reference supports preparation involving hydronic heating principles, piping arrangements, circulators, heat emitters, controls, system components, and practical hydronic design concepts.
• Solar Water and Pool Heating Design and Installation Manual
  This study-only reference supports solar water-heating preparation, including system components, basic design concepts, installation methods, circulation, storage, and related solar applications.
• Pipefitter's Handbook
  This practical study reference supports pipe measurements, fittings, layout, dimensions, calculations, and field-oriented pipefitting knowledge.
• Pipe Welding Procedures, 2003
  This study reference supports preparation involving pipe welding procedures, joint preparation, welding techniques, equipment, workmanship, and related piping knowledge.

Exam Room Approved Books

• Uniform Plumbing Code, 2018
  Approved for use during the Nevada C-1D Plumbing Contractor examination.
• NFPA 54 - Standard for National Fuel Gas Code, 2012
  Approved for use during the examination for applicable natural gas and fuel-gas questions.
• NFPA 58 - Standard for Liquid Petroleum Gas Code, 2014
  Approved for use during the examination for applicable LP-Gas requirements.
• Uniform Mechanical Code, 2012
  Approved for use during the examination for applicable mechanical and hydronic-system requirements.

Test Information and Study Materials

A productive C-1D preparation plan should start with the major plumbing systems. Water Supply study should include sizing, pressure, materials, valves, backflow prevention, distribution, supports, and system protection. Candidates should practice locating applicable tables and requirements in the Uniform Plumbing Code.

Drain, Waste, and Vent Systems should include drainage sizing, slope, vents, fixture units, cleanouts, connections, traps, interceptors, and general sanitary drainage requirements. Practice interpreting both written questions and plumbing diagrams.

Gas Systems should be studied with NFPA 54 and NFPA 58 nearby. Learn the difference between natural gas and LP-Gas systems and practice identifying which reference should be used for a particular question.

Water Heaters and Venting should include appliance installation, venting, temperature and pressure protection, combustion air, clearances, and fuel-gas considerations.

Hydronics should include basic hot-water heating principles, circulators, piping arrangements, controls, heat emitters, expansion, and system operation. The Modern Hydronic Heating reference provides additional study support for this subject.

Plumbing Mathematics and Isometric Analysis should be practiced repeatedly. Work through pipe sizing, elevations, measurements, areas, volumes, offsets, and other calculations until the process can be completed efficiently.

Safety should be studied before test day because OSHA is not allowed into the examination. Candidates should develop enough familiarity with construction safety principles to answer these questions from retained knowledge.

Solar preparation should include the major components and basic operating principles of solar water-heating systems. The solar design and installation manual can help strengthen this portion of the exam.

Code navigation should be part of every study session. Rather than reading all four allowed books from beginning to end, candidates should practice finding answers to targeted questions and learn where major subjects are located.

A useful exercise is to sort practice questions by reference. Create separate groups for UPC, NFPA 54, NFPA 58, and UMC questions. This helps build the habit of choosing the correct book before beginning the lookup.

Timed practice is also important. Three hours for 80 questions gives candidates a little over two minutes per question on average. Candidates should learn when to perform a code lookup and when to answer from trade knowledge and move forward.

How 1 Exam Prep Helps You Reach Your Goal

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

The C-1D examination covers a broad range of plumbing knowledge, so preparation needs to be organized around the actual trade subjects rather than random code reading. Candidates can focus on water supply, DWV, gas systems, water heaters, hydronics, plumbing mathematics, safety, solar, backflow, storm drainage, and related topics.

The four exam-room references can be used throughout preparation to build navigation speed. Repeated practice helps candidates learn which book applies to a particular question and where important tables, definitions, and code sections are located.

The study-only books provide additional technical depth for subjects that must be understood before entering the testing room. Mathematics for Plumbers and Pipefitters strengthens calculation skills, OSHA supports safety preparation, Modern Hydronic Heating supports heating-system study, and the solar, pipefitting, and welding references broaden practical trade review.

1 Exam Prep encourages candidates to combine reference navigation with practice questions and active recall. When a question is missed, identify whether the problem was a technical knowledge gap, a calculation issue, or difficulty locating the correct code section, then focus the next study session accordingly.

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

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

The Nevada C-1D Plumbing Contractor examination contains 80 questions.

How much time is allowed for the C-1D examination?

Candidates are allowed 3 hours to complete the examination.

How many correct answers are required to pass?

Candidates must answer 56 questions correctly to pass the C-1D trade examination.

Is the Nevada C-1D Plumbing Contractor exam open book?

Yes. The Nevada C-1D examination is an open-book test with approved references permitted in the examination room.

Which books are allowed into the C-1D exam?

The package includes four exam-room references: Uniform Plumbing Code 2018, NFPA 54 2012, NFPA 58 2014, and Uniform Mechanical Code 2012.

Is Mathematics for Plumbers and Pipefitters allowed into the exam?

No. Mathematics for Plumbers and Pipefitters, 8th edition is included for preparation but is not allowed into the trade examination.

Is OSHA 29 CFR Part 1926 allowed into the exam?

No. OSHA 29 CFR Part 1926 is a study-only reference for the C-1D 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.

Does the C-1D exam include plumbing mathematics?

Yes. Isometric Analysis and Plumbing Mathematics accounts for 6 questions.

Does the exam include gas systems?

Yes. Gas Systems accounts for 8 questions.

Does the C-1D examination cover hydronic heating?

Yes. Hydronics is included in the exam, and the C-1D classification covers applicable hydronic heating systems not exceeding 200,000 BTUs.

Does the exam include solar water heating?

Yes. Solar is included in the examination outline, reflecting the C-1D scope involving systems used to heat potable water, including solar equipment.

How should I prepare for four open-book references?

Practice identifying which reference applies before beginning a lookup. Use timed questions to become familiar with the UPC, NFPA 54, NFPA 58, and UMC so you can move efficiently between books during the examination.

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

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