Nevada C-21 Refrigeration & Air Conditioning Maintenance
Contractor Practice Exam 200 Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A
---
Table of Contents
- Part 1: Nevada Licensure & Business Law (Questions 1–35)
- Part 2: General HVAC & Refrigeration Knowledge (Questions 36–80)
- Part 3: Safety, Tools & Best Practices (Questions 81–110)
- Part 4: Maintenance & Troubleshooting (Questions 111–150)
- Part 5: Codes & Regulations (Questions 151–180)
- Part 6: EPA Section 608 & Refrigerant Management (Questions 181–200)
---
How to Use This Guide
Each question is designed to reflect the content and difficulty of the PSI-administered C-21D
exam. The exam has 60 questions, with a 2-hour time limit and a minimum passing score of 42
correct (70%). Candidates must also pass the separate Contractor Management Survey (CMS)
Exam on business and law.
---
,Part 1: Nevada Licensure & Business Law
These questions cover the Nevada Revised Statutes (NRS) Chapter 624, the role of the Nevada
State Contractors Board (NSCB), and essential business practices for contractors.
---
1. Under Nevada law, what is the primary purpose of the Nevada State Contractors Board
(NSCB)?
A) To promote the growth of the construction industry through tax incentives
B) To protect the public by regulating the construction industry
C) To provide free legal representation for contractors
D) To design building codes for local municipalities
Correct Answer: B
Rationale: The primary purpose of the NSCB is to protect the public against improper conduct
by contractors. This is achieved through licensing, regulation, and discipline of contractors.
---
2. Which chapter of the Nevada Revised Statutes (NRS) establishes the NSCB and outlines its
authority?
A) NRS 108
B) NRS 624
C) NRS 617
D) NRS 704
,Correct Answer: B
Rationale: NRS Chapter 624 is the Contractors' License Law, which establishes the Nevada State
Contractors Board (NSCB) and defines its authority to license and regulate contractors. NRS 108
covers liens, NRS 617 covers occupational diseases, and NRS 704 covers public utilities.
---
3. What is the minimum amount of relevant work experience required to qualify for a Nevada C-
21 contractor license?
A) Two years as a journeyman
B) Four years as a journeyman or in a supervisory role
C) Six years as an apprentice
D) No experience requirement, only exam passage
Correct Answer: B
Rationale: Licensing requirements begin with completing a minimum of four years of relevant
experience in the trade. This includes working as a journeyman, supervising employee,
foreman, or contractor.
---
4. What is the minimum age requirement to obtain a contractor's license in Nevada?
A) 18 years
B) 21 years
, C) 25 years
D) No minimum age
Correct Answer: A
Rationale: Applicants for a contractor's license in Nevada must be at least 18 years of age. This is
a fundamental requirement for licensure under NRS 624.
---
5. An applicant for a C-21 license must submit a financial statement to the NSCB. What is the
primary purpose of this requirement?
A) To prove the applicant's credit score
B) To demonstrate financial solvency and the ability to operate as a contractor
C) To calculate the applicant's income tax rate
D) To qualify for a bank loan
Correct Answer: B
Rationale: The financial statement is required to demonstrate that the applicant has sufficient
financial solvency (net worth) and working capital to operate a contracting business.
---
6. Which of the following is NOT a required part of the application package for a Nevada
contractor's license?
A) A set of fingerprints
Contractor Practice Exam 200 Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A
---
Table of Contents
- Part 1: Nevada Licensure & Business Law (Questions 1–35)
- Part 2: General HVAC & Refrigeration Knowledge (Questions 36–80)
- Part 3: Safety, Tools & Best Practices (Questions 81–110)
- Part 4: Maintenance & Troubleshooting (Questions 111–150)
- Part 5: Codes & Regulations (Questions 151–180)
- Part 6: EPA Section 608 & Refrigerant Management (Questions 181–200)
---
How to Use This Guide
Each question is designed to reflect the content and difficulty of the PSI-administered C-21D
exam. The exam has 60 questions, with a 2-hour time limit and a minimum passing score of 42
correct (70%). Candidates must also pass the separate Contractor Management Survey (CMS)
Exam on business and law.
---
,Part 1: Nevada Licensure & Business Law
These questions cover the Nevada Revised Statutes (NRS) Chapter 624, the role of the Nevada
State Contractors Board (NSCB), and essential business practices for contractors.
---
1. Under Nevada law, what is the primary purpose of the Nevada State Contractors Board
(NSCB)?
A) To promote the growth of the construction industry through tax incentives
B) To protect the public by regulating the construction industry
C) To provide free legal representation for contractors
D) To design building codes for local municipalities
Correct Answer: B
Rationale: The primary purpose of the NSCB is to protect the public against improper conduct
by contractors. This is achieved through licensing, regulation, and discipline of contractors.
---
2. Which chapter of the Nevada Revised Statutes (NRS) establishes the NSCB and outlines its
authority?
A) NRS 108
B) NRS 624
C) NRS 617
D) NRS 704
,Correct Answer: B
Rationale: NRS Chapter 624 is the Contractors' License Law, which establishes the Nevada State
Contractors Board (NSCB) and defines its authority to license and regulate contractors. NRS 108
covers liens, NRS 617 covers occupational diseases, and NRS 704 covers public utilities.
---
3. What is the minimum amount of relevant work experience required to qualify for a Nevada C-
21 contractor license?
A) Two years as a journeyman
B) Four years as a journeyman or in a supervisory role
C) Six years as an apprentice
D) No experience requirement, only exam passage
Correct Answer: B
Rationale: Licensing requirements begin with completing a minimum of four years of relevant
experience in the trade. This includes working as a journeyman, supervising employee,
foreman, or contractor.
---
4. What is the minimum age requirement to obtain a contractor's license in Nevada?
A) 18 years
B) 21 years
, C) 25 years
D) No minimum age
Correct Answer: A
Rationale: Applicants for a contractor's license in Nevada must be at least 18 years of age. This is
a fundamental requirement for licensure under NRS 624.
---
5. An applicant for a C-21 license must submit a financial statement to the NSCB. What is the
primary purpose of this requirement?
A) To prove the applicant's credit score
B) To demonstrate financial solvency and the ability to operate as a contractor
C) To calculate the applicant's income tax rate
D) To qualify for a bank loan
Correct Answer: B
Rationale: The financial statement is required to demonstrate that the applicant has sufficient
financial solvency (net worth) and working capital to operate a contracting business.
---
6. Which of the following is NOT a required part of the application package for a Nevada
contractor's license?
A) A set of fingerprints
