Nevada Solar Air Conditioning Contractor (C-21E) Exam Book Package

Prepare for the Nevada Solar Air Conditioning Contractor (C-21E) examination with an exam book package built around the code reference and technical study materials used for solar air-conditioning preparation. This package includes the Uniform Plumbing Code, 2018, Code of Federal Regulations - 29 CFR Part 1926 (OSHA), and the Solar Water and Pool Heating Design and Installation Manual.

The Nevada C-21E Solar Air Conditioning Contractor examination is an open-book test. The Uniform Plumbing Code, 2018 is the exam-room-approved reference included in this package. The OSHA construction safety reference and the Solar Water and Pool Heating Design and Installation Manual are included for study but are not allowed into the trade examination room.

The Nevada C-21E examination contains 45 questions, allows 1.5 hours for completion, and requires 32 correct answers to pass. The examination covers Piping, System Design, Pumps and Storage Systems, Collectors, System Valves and Controls, and Safety.

The C-21E Solar Air Conditioning subclassification covers the installation of collectors, piping, storage, and other equipment used in the conversion of solar energy to energy used for the control of air temperatures. Candidates should therefore prepare for both practical solar thermal system concepts and code-based piping requirements.

Solar air-conditioning systems bring together thermal energy collection, circulation, storage, piping, pumps, collectors, valves, controls, and safety. Candidates should understand how these components work individually and how they operate together as a complete system.

The Uniform Plumbing Code supports code navigation for piping and related plumbing requirements, while the Solar Water and Pool Heating Design and Installation Manual supports practical solar thermal knowledge. OSHA 29 CFR Part 1926 supports construction safety preparation for the Safety portion of the examination.

The package gives candidates both the exam-room code reference and the study-only technical references needed to organize preparation across the major C-21E examination topics.

What You Get

• Uniform Plumbing Code, 2018 — exam-room-approved reference supporting piping, materials, fittings, supports, valves, connections, and related plumbing requirements.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA) — study reference supporting construction safety, fall protection, ladders, personal protective equipment, tools, electrical hazards, and other jobsite safety topics.
• Solar Water and Pool Heating Design and Installation Manual — study reference supporting solar thermal system design, collectors, piping, pumps, storage, valves, controls, circulation, and installation practices.

Exam Details

The Nevada C-21E Solar Air Conditioning Contractor examination contains 45 questions. Candidates are allowed 1.5 hours to complete the examination and must answer 32 questions correctly to pass.

The examination content is divided into the following subject areas:

• Piping: 10 questions
• System Design: 15 questions
• Pumps and Storage Systems: 5 questions
• Collectors: 7 questions
• System Valves and Controls: 3 questions
• Safety: 5 questions

System Design is the largest category with 15 questions. Candidates should spend substantial preparation time understanding complete system layouts, circulation, storage, heat transfer, collector arrangements, controls, and the relationship between individual components.

Piping represents 10 questions and is one of the most important areas for Uniform Plumbing Code navigation. Candidates should be familiar with pipe materials, fittings, supports, joining methods, routing, connections, and other plumbing requirements.

Collectors accounts for 7 questions. Candidates should understand collector function, mounting considerations, flow relationships, circulation, and how collectors fit into a complete solar air-conditioning system.

Pumps and Storage Systems and Safety each account for 5 questions, while System Valves and Controls represents 3 questions. These smaller categories remain important because together they represent a substantial portion of the examination.

Open Book Test

The Nevada C-21E Solar Air Conditioning Contractor examination is an open-book test.

The reference included in this package that is allowed into the trade examination is:

• Uniform Plumbing Code, 2018

The following references are included for study but are not allowed into the trade examination room:

• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
• Solar Water and Pool Heating Design and Installation Manual

The Uniform Plumbing Code should be used regularly during preparation so candidates become familiar with the book's structure, table of contents, index, definitions, tables, exceptions, and cross-references.

With 45 questions in 1.5 hours, candidates have approximately two minutes per question on average. Open-book testing can help with code-specific questions, but broad searches can consume valuable time. Candidates should first identify the subject of a question, then navigate directly to the most likely section.

Questions involving piping materials, fittings, supports, connections, valves, or plumbing requirements may require use of the Uniform Plumbing Code. Questions involving system design, collectors, pumps, storage, controls, or safety may rely more heavily on retained trade knowledge.

The Solar Water and Pool Heating Design and Installation Manual and OSHA reference should therefore be used to build retained knowledge before test day rather than as exam-room lookup tools.

Licensing Steps

1. Confirm the C-21E classification. Make sure the Solar Air Conditioning subclassification matches the type of work the business intends to perform.
2. Identify the qualifying individual. The contractor application must identify the person responsible for satisfying the applicable qualification requirements.
3. Prepare qualifying experience information. Organize the work-history documentation required for the C-21E classification.
4. Submit the Nevada contractor license application. Complete the applicable application and supporting documentation.
5. Receive examination eligibility. After applicable application and qualification requirements are addressed, proceed with required testing.
6. Prepare for the C-21E trade examination. Study piping, system design, pumps and storage systems, collectors, valves and controls, and safety.
7. Practice Uniform Plumbing Code navigation. Use the 2018 UPC regularly during preparation so code lookups become faster and more familiar.
8. Prepare for Nevada contractor business requirements. Complete the applicable contractor business and law preparation required for Nevada licensing.
9. Complete required examinations. Take the applicable trade and business examinations.
10. Complete remaining licensing requirements. Finish the other applicable requirements associated with contractor license issuance.

State Requirements

Nevada identifies C-21E as the Solar Air Conditioning subclassification under the broader refrigeration and air-conditioning classification.

The C-21E scope covers the installation of collectors, piping, storage, and other equipment used in the conversion of solar energy to energy used for the control of air temperatures.

The classification is focused on solar thermal air-conditioning applications rather than photovoltaic electrical generation. Candidates should concentrate on systems that collect, transfer, store, and control solar-derived thermal energy for temperature control.

Practical work can involve collectors, circulation piping, pumps, storage equipment, valves, controls, heat-transfer components, and related installation work. Understanding how these elements function together is an important part of C-21E preparation.

Code knowledge is also important because piping systems must be installed with appropriate materials, fittings, supports, valves, and connections. The Uniform Plumbing Code provides the exam-room reference for these requirements.

The C-21E trade examination is one part of Nevada contractor licensing. Applicants must also satisfy applicable qualification, application, business, financial, and other licensing requirements before a contractor license is issued.

Reference Books

• Uniform Plumbing Code, 2018
  The exam-room-approved reference supports preparation involving piping systems, pipe materials, fittings, supports, valves, connections, and related plumbing code requirements applicable to solar thermal installations.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  The study-only reference supports preparation involving construction safety, personal protective equipment, fall protection, ladders, tools, electrical hazards, material handling, and other jobsite safety topics.
• Solar Water and Pool Heating Design and Installation Manual
  The study-only reference supports preparation involving solar thermal design, collectors, circulation, piping, pumps, storage, valves, controls, heat-transfer concepts, and installation practices relevant to the C-21E examination.

Exam Room Approved Books

• Uniform Plumbing Code, 2018
  Uniform Plumbing Code, 2018 is the exam-room-approved reference included in the Nevada Solar Air Conditioning Contractor (C-21E) Exam Book Package. Candidates should practice locating piping, materials, fittings, supports, valves, connections, and related plumbing requirements efficiently.

Test Information and Study Materials

A strong Nevada C-21E study plan should begin with System Design because it represents 15 of the 45 examination questions. Candidates should understand how collectors, piping, pumps, storage, valves, controls, and heat-transfer components work as a complete solar thermal system.

Instead of memorizing components independently, follow the movement of energy through the system. Understand how solar energy is captured at the collector, transferred into a working medium, circulated through the system, stored when necessary, and ultimately used in controlling air temperatures.

Piping represents 10 questions. Candidates should review pipe materials, fittings, supports, joining methods, routing, expansion, insulation, valves, and connections.

The Uniform Plumbing Code, 2018 should be used regularly for piping preparation. Practice using the table of contents and index to locate requirements by topic rather than relying on remembered page numbers.

Definitions can be important when a question uses a technical plumbing term. Understanding the code definition can help determine which section or requirement applies.

Tables should also receive careful attention. Requirements involving materials, sizing, supports, or other conditions may be contained in tables rather than paragraph text.

Exceptions can alter how a general requirement applies. Candidates should read surrounding language carefully before selecting an answer.

Cross-references can lead to additional requirements. Practice following them when one section directs the reader to another chapter or provision.

Collectors represents 7 questions. Candidates should understand how solar collectors capture thermal energy and how collector placement, arrangement, circulation, and connections affect system operation.

Review mounting concepts, orientation, flow through collector arrays, collector connections, and practical installation considerations.

Pumps and Storage Systems accounts for 5 questions. Candidates should understand pump purpose, circulation, storage tanks, heat exchangers, and how stored thermal energy can be used for later temperature-control demands.

Review how pumps affect flow through collectors and piping, as well as the role of storage in maintaining system usefulness when solar input varies.

System Valves and Controls represents 3 questions. Candidates should review shutoff valves, check valves, balancing components, temperature controls, differential controls, pressure-related devices, and other components that influence operation.

Safety accounts for 5 questions. Candidates should use OSHA 29 CFR Part 1926 to study fall protection, ladders, roof work, personal protective equipment, electrical hazards, tools, material handling, and other construction safety topics.

More on test Information and Study Materials

Because OSHA is not allowed into the examination room, candidates should build strong retained safety knowledge before test day.

The Solar Water and Pool Heating Design and Installation Manual should be used to connect individual exam subjects into complete system understanding. It can help reinforce collector layouts, circulation, piping, pumps, storage, valves, and controls.

Because the manual is not allowed into the exam room, active recall can be particularly useful. Review a system diagram or installation topic, close the book, and explain the sequence and purpose of the major components from memory.

Heat transfer is a central concept in solar air-conditioning preparation. Candidates should understand how collected solar energy moves through a working fluid or thermal system and becomes useful for controlling air temperatures.

System balance should also be studied. Proper circulation through collectors affects performance, so candidates should understand why balanced piping and appropriate flow are important.

Freeze protection can be relevant to outdoor solar thermal components. Candidates should understand general system-design approaches used to protect exposed equipment and piping from damaging environmental conditions.

Insulation is another important concept because unwanted heat loss can reduce system performance. Candidates should understand why piping is insulated and why the surrounding environment matters.

Thermal expansion should also be considered. Piping exposed to elevated temperatures can expand, making material selection, support, and allowance for movement important installation considerations.

A useful study schedule is to divide preparation according to the exam outline. Spend the most time on System Design and Piping, followed by Collectors, Pumps and Storage Systems, Safety, and System Valves and Controls.

Once each area becomes familiar, move into mixed-question practice. The actual examination may shift quickly between system design, piping, collectors, controls, or safety.

Timed code-navigation drills can help improve efficiency. Choose a piping subject and practice locating the relevant UPC provision within a limited amount of time.

Do not depend on finding every answer in the code. The Uniform Plumbing Code is most useful for targeted code questions, while many practical questions require retained knowledge from study and field experience.

When a practice question is missed, identify the reason. The issue may involve weak trade knowledge, unfamiliar terminology, slow code navigation, or difficulty understanding how system components interact.

More on test Information and Study Materials

Correcting the underlying weakness is more useful than memorizing a single answer. The goal is to build a working understanding that can be applied to unfamiliar examination questions.

How Pass Your Nevada Contractor Exam Helps You Reach Your Goal

Pass Your Nevada Contractor Exam supports Nevada C-21E Solar Air Conditioning Contractor candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation when applicable, and confidence-building study structure.

The exam book package combines the exam-room-approved Uniform Plumbing Code, 2018 with OSHA 29 CFR Part 1926 and the Solar Water and Pool Heating Design and Installation Manual for broader preparation.

Reference-navigation practice can help candidates become more comfortable locating piping, materials, fittings, supports, valves, connections, definitions, tables, and related requirements in the UPC.

Trade-focused preparation supports stronger knowledge of collectors, pumps, storage, piping, controls, heat-transfer concepts, and complete solar air-conditioning system operation.

Practice-oriented review can help identify whether missed questions result from weak system-design knowledge, confusion about collectors or circulation, slow code navigation, limited pump and storage knowledge, or safety weaknesses.

The goal is to help candidates approach the Nevada C-21E Solar Air Conditioning Contractor examination with stronger solar thermal knowledge, improved Uniform Plumbing Code familiarity, better reference-navigation skills, and a structured study routine without guaranteeing a passing score or licensing approval.

How many questions are on the Nevada C-21E Solar Air Conditioning Contractor exam?

The Nevada C-21E examination contains 45 questions.

How much time is allowed for the C-21E examination?

Candidates are allowed 1.5 hours to complete the examination.

How many correct answers are required to pass?

Candidates must answer 32 questions correctly to pass the Nevada C-21E examination.

Is the Nevada C-21E examination open book?

Yes. The Nevada C-21E Solar Air Conditioning Contractor examination is an open-book test.

Which book is allowed into the Nevada C-21E exam?

The Uniform Plumbing Code, 2018 is the exam-room-approved reference 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 trade examination room.

Is the Solar Water and Pool Heating Design and Installation Manual allowed into the exam?

No. The Solar Water and Pool Heating Design and Installation Manual is included for study but is not allowed into the trade examination room.

What is the largest subject on the C-21E exam?

System Design is the largest examination category with 15 questions.

How many piping questions are on the C-21E exam?

Piping accounts for 10 questions.

How many collector questions are on the exam?

More on how Pass Your Nevada Contractor Exam Helps You Reach Your Goal

Collectors accounts for 7 questions.

Does the C-21E exam cover pumps and storage systems?

Yes. Pumps and Storage Systems accounts for 5 questions.

Does the C-21E exam cover safety?

Yes. Safety accounts for 5 questions.

What work does the Nevada C-21E classification cover?

The C-21E classification covers installation of collectors, piping, storage, and other equipment used to convert solar energy into energy used for controlling air temperatures.

Is the C-21E classification focused on photovoltaic electrical systems?

The C-21E classification is focused on solar thermal equipment used in the control of air temperatures rather than photovoltaic electrical generation.

Should I practice using the Uniform Plumbing Code before test day?

Yes. Regular navigation practice can help candidates locate piping, materials, fittings, supports, valves, and related plumbing provisions more efficiently during the open-book examination.

Does this package guarantee that I will pass the Nevada C-21E exam?

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