Nevada Chilled and Hot Water Systems Contractor (C-21F) Books Allowed into Exam Package

Prepare for the Nevada Chilled and Hot Water Systems Contractor (C-21F) examination with a focused Books Allowed into Exam Package containing the references approved for use during the trade exam. This package is designed for candidates who already have their broader technical study materials and specifically need the books permitted in the C-21F exam room.

The package includes the Uniform Mechanical Code, 2018, Uniform Plumbing Code, 2018, and Code of Federal Regulations - 29 CFR Part 1926 (OSHA). These references support preparation involving mechanical systems, chilled-water and hot-water piping, equipment, code requirements, and construction safety.

The Nevada C-21F Chilled and Hot Water Systems subclassification covers the installation of boilers, chillers, coils, cooling towers, piping, pumps, storage tanks, valves, and other equipment used in the production and transfer of water for temperature control. Candidates should understand both the equipment and the piping systems that connect these components into a functioning hydronic system.

Because the C-21F examination is open book, candidates should spend time becoming familiar with all three approved references before test day. Knowing which book is most likely to contain a particular requirement can help reduce unnecessary searching and make reference use more efficient during the examination.

The Uniform Mechanical Code, 2018 supports mechanical-system preparation, including equipment, piping, appliances, hydronic-system relationships, and other code requirements associated with chilled-water and hot-water work.

The Uniform Plumbing Code, 2018 supports piping-related preparation, including materials, fittings, installation requirements, water-system provisions, and other plumbing-code concepts relevant to the C-21F scope.

The Code of Federal Regulations - 29 CFR Part 1926 (OSHA) supports construction-safety preparation and provides the safety reference approved for the examination. Candidates should become comfortable locating applicable safety rules while also developing enough safety knowledge to answer familiar questions without relying on a lookup every time.

This package is intentionally focused on the books allowed into the exam. It does not include study-only refrigeration or boiler textbooks that are not permitted in the C-21F trade examination.

Exam Details

The Nevada C-21F Chilled and Hot Water Systems trade examination is administered through PSI for candidates authorized to test through the Nevada State Contractors Board.

• Exam: Nevada C-21F Chilled and Hot Water Systems
• Testing Provider: PSI
• Number of Questions: 50
• Time Allowed: 2 hours
• Minimum Passing Score: 35 correct answers

The examination content is divided into the following subject areas:

• Piping: 15 questions
• Water Cooling Equipment: 10 questions
• Water Heating Equipment: 10 questions
• Valves and Controls: 8 questions
• Safety: 7 questions

Piping is the largest individual section of the C-21F examination. Candidates should review piping materials, fittings, joining methods, supports, layouts, equipment connections, circulation, flow relationships, valves, and applicable mechanical and plumbing-code requirements.

Water Cooling Equipment accounts for 10 questions. Candidates should understand chillers, cooling towers, coils, pumps, system circulation, heat transfer, storage components, and the basic operating relationships found in chilled-water systems.

Water Heating Equipment also accounts for 10 questions. Preparation should include boilers, pumps, tanks, piping, controls, valves, and the equipment used to generate, circulate, and transfer heated water.

Valves and Controls represents eight questions. Candidates should understand the function of common valves, control devices, temperature-control components, flow-control devices, and related equipment used to regulate hydronic systems.

Safety represents seven questions. Candidates should prepare for jobsite hazards, personal protective equipment, tools, ladders, material handling, fall protection, and other construction-safety requirements applicable to mechanical-system installation.

With 50 questions and two hours available, candidates should practice maintaining a steady pace. Reference navigation should be efficient enough that code lookups do not consume excessive time.

Open Book Test

The Nevada C-21F Chilled and Hot Water Systems examination is an open-book test. The exam-room-approved references included in this package are:

• Uniform Mechanical Code, 2018
• Uniform Plumbing Code, 2018
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)

Candidates should practice with all three books throughout preparation. The goal is not simply to know that the references are available, but to understand which book applies to different categories of questions and where important material is generally located.

The Uniform Mechanical Code should be used for repeated practice involving mechanical equipment, piping, hydronic systems, appliances, and related code provisions.

The Uniform Plumbing Code should be used for piping, materials, fittings, water-system provisions, installation requirements, and related plumbing-code topics.

OSHA 29 CFR Part 1926 should be used for construction-safety preparation involving jobsite hazards, protective equipment, tools, ladders, falls, material handling, and other safety requirements.

A strong open-book strategy is selective. Candidates should avoid opening a reference for every question. Questions based on familiar system operation, equipment, piping, or safety knowledge can often be answered directly, while specific code questions should be confirmed in the appropriate book.

Licensing Steps

The Nevada State Contractors Board regulates the C-21F Chilled and Hot Water Systems subclassification. Passing the trade examination is one part of the contractor licensing process.

1. Confirm the C-21F classification. Determine that Chilled and Hot Water Systems matches the work the contracting business intends to perform.
2. Identify the qualifying individual. Designate the person who will satisfy the applicable experience and technical qualification requirements.
3. Document qualifying experience. Prepare records describing relevant work involving boilers, chillers, coils, cooling towers, piping, pumps, tanks, valves, and related hydronic equipment.
4. Prepare the Nevada contractor license application. Gather business information, qualifier information, experience documentation, financial information, and required supporting materials.
5. Submit the application. The Nevada State Contractors Board reviews the applicant's qualifications before examination eligibility is established.
6. Complete applicable background requirements. Follow required fingerprint, disclosure, and background procedures.
7. Meet financial responsibility requirements. Provide the applicable financial documentation required during the contractor licensing process.
8. Receive examination eligibility. Candidates who must test can proceed with scheduling after authorization.
9. Schedule the C-21F trade examination through PSI. Arrange testing after eligibility has been established.
10. Prepare for the trade exam. Review piping, water cooling equipment, water heating equipment, valves and controls, safety, and reference navigation.
11. Complete applicable management qualification requirements. Nevada contractor licensing also includes management qualification requirements in addition to the trade examination.
12. Complete required examinations. Satisfy applicable trade and management testing requirements unless an approved waiver applies.
13. Complete remaining licensing requirements. Address applicable bonding, financial responsibility, background, and other Nevada State Contractors Board requirements.

State Requirements

The Nevada C-21F Chilled and Hot Water Systems subclassification authorizes the installation of boilers, chillers, coils, cooling towers, piping, pumps, storage tanks, valves, and other equipment used to produce and transfer water for the control of temperatures.

The classification requires an understanding of both heating and cooling systems. Candidates should know how major components work together and how water is circulated through piping, pumps, equipment, storage components, valves, and controls.

Boilers and related heating equipment are central to hot-water systems, while chillers and cooling towers are important components in chilled-water systems. Piping provides the connection between these components and the rest of the system, making piping knowledge especially important for C-21F candidates.

The classification is part of Nevada's broader C-21 Refrigeration and Air-Conditioning category but focuses specifically on chilled-water and hot-water systems rather than the entire range of refrigeration or air-conditioning work.

For the standard Nevada contractor licensing pathway, the qualifying individual generally must document at least four years of qualifying experience within the applicable experience period required by the Nevada State Contractors Board.

Qualifying experience should relate directly to the requested classification. Applicants should maintain organized records describing the equipment and systems worked on, responsibilities held, and the time period during which the experience was obtained.

Passing the C-21F trade examination does not automatically result in contractor license issuance. Applicants must also satisfy applicable management qualification, financial responsibility, bonding, background, and other Nevada State Contractors Board requirements.

Reference Books

• Uniform Mechanical Code, 2018
  Exam-room-approved reference supporting mechanical-code preparation involving hydronic systems, mechanical equipment, piping, appliances, and related requirements relevant to Nevada C-21F work.
• Uniform Plumbing Code, 2018
  Exam-room-approved reference supporting piping preparation involving materials, fittings, installation requirements, water systems, and related plumbing-code provisions applicable to chilled-water and hot-water systems.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Exam-room-approved safety reference supporting preparation involving personal protective equipment, falls, ladders, tools, material handling, and other construction-safety requirements.

Exam Room Approved Books

• Uniform Mechanical Code, 2018
  This reference is approved for use during the Nevada C-21F Chilled and Hot Water Systems trade examination.
• Uniform Plumbing Code, 2018
  This reference is approved for use during the Nevada C-21F Chilled and Hot Water Systems trade examination.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  This reference is approved for use during the Nevada C-21F Chilled and Hot Water Systems trade examination.

This package is specifically focused on the books allowed into the C-21F exam room. Candidates who already have their refrigeration, boiler, or other technical study resources can use this package to complete the approved-reference portion of their preparation.

Test Information and Study Materials

A productive C-21F study plan should combine technical system knowledge with efficient use of the three approved references. Because the exam contains code, equipment, piping, controls, and safety material, candidates should practice identifying the type of question before choosing a reference.

Prioritize piping. Piping is the largest category with 15 questions. Review piping materials, joining methods, fittings, supports, valves, flow relationships, circulation, equipment connections, and applicable mechanical and plumbing-code requirements.

Review water cooling equipment. Study chillers, cooling towers, coils, pumps, circulation, heat-transfer relationships, and common chilled-water-system components.

Review water heating equipment. Study boilers, pumps, tanks, piping, heat-transfer equipment, and common hot-water-system components.

Study valves and controls. Understand how valves and control devices regulate temperature, pressure, flow, and equipment operation within hydronic systems.

Prepare for safety. Review OSHA requirements and common safety practices involving personal protective equipment, ladders, tools, material handling, and mechanical-equipment installation.

Practice Mechanical Code navigation. Become familiar with the Uniform Mechanical Code and practice locating sections connected with equipment, hydronic systems, mechanical piping, and related requirements.

Practice Plumbing Code navigation. Use the Uniform Plumbing Code to locate information involving materials, fittings, installation methods, and water-system requirements.

Practice OSHA navigation. Become comfortable identifying and locating applicable construction-safety requirements without spending excessive time searching.

Use timed reference exercises. The C-21F exam allows two hours for 50 questions. Timed practice can help candidates determine when a reference lookup is worthwhile and how quickly they need to locate information.

Know which book to use. Efficient reference selection is important. A mechanical-equipment question is more likely to point toward the UMC, a piping or water-system question may require the UPC, and a safety question may require OSHA.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Nevada C-21F Chilled and Hot Water Systems Contractor candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation, and confidence-building study structure.

This Books Allowed into Exam Package provides the three approved references candidates can use during the C-21F trade examination. Having the correct books is only the first step; effective preparation also requires becoming familiar with how those references are organized.

Reference-navigation practice helps candidates identify which book applies to a particular question and locate the relevant section more efficiently. This can be especially valuable when working with multiple references during a timed exam.

Trade-focused preparation helps candidates build the technical knowledge needed for piping, cooling equipment, heating equipment, valves, controls, and safety. Candidates should understand how components work together within complete chilled-water and hot-water systems.

Practice-oriented review can help candidates identify weaker areas. Someone with extensive piping experience may need more preparation involving boilers, chillers, or controls, while another candidate may need additional work with safety or code navigation.

The Uniform Mechanical Code, Uniform Plumbing Code, and OSHA should be used regularly during preparation so candidates become familiar with each reference instead of encountering them only on exam day.

By combining the approved C-21F exam-room books with structured study, technical review, and repeated reference-navigation practice, 1 Exam Prep helps candidates build a focused approach to preparing for the Nevada Chilled and Hot Water Systems Contractor examination.

Frequently Asked Questions

What is included in the Nevada C-21F Books Allowed into Exam Package?

The package includes the Uniform Mechanical Code, 2018; Uniform Plumbing Code, 2018; and Code of Federal Regulations - 29 CFR Part 1926 (OSHA).

Are all three books allowed into the C-21F examination?

Yes. The Uniform Mechanical Code, Uniform Plumbing Code, and OSHA 29 CFR Part 1926 are approved references for the Nevada C-21F examination.

Is the Nevada C-21F examination open book?

Yes. The Nevada C-21F Chilled and Hot Water Systems examination is an open-book test using the approved references.

How many questions are on the Nevada C-21F exam?

The examination contains 50 questions.

How much time is allowed for the C-21F exam?

Candidates have two hours to complete the examination.

What score is required to pass?

The minimum passing score is 35 correct answers out of 50 questions.

What is the largest exam category?

Piping is the largest individual category, with 15 questions.

What equipment should I study for the C-21F examination?

Preparation should include boilers, chillers, coils, cooling towers, pumps, storage tanks, valves, controls, piping systems, and related equipment used to produce and transfer water for temperature control.

Why is OSHA included in this package?

OSHA 29 CFR Part 1926 is an approved exam-room reference for the C-21F examination and supports preparation for the safety portion of the test.

Why should I practice with all three books before test day?

Practicing with all three references helps candidates learn which book applies to different types of questions and locate applicable information more efficiently.

Does this package include study-only refrigeration or boiler books?

No. This package is specifically focused on the references allowed into the C-21F trade examination.

What does the Nevada C-21F classification cover?

The classification covers installation of boilers, chillers, coils, cooling towers, piping, pumps, storage tanks, valves, and other equipment used in the production and transfer of water for temperature control.

Does passing the C-21F exam automatically issue a Nevada contractor license?

No. Passing the trade examination is one part of the licensing process. Applicants must also satisfy applicable experience, management, financial responsibility, bonding, background, and other Nevada State Contractors Board requirements.

Who is this package best for?

This package is best for candidates who already have their broader C-21F study materials and specifically need the approved Uniform Mechanical Code, Uniform Plumbing Code, and OSHA references for use during the Nevada trade examination.