Delaware Master HVACR Restricted
Examination Practice Exam 2026 | 100+
Questions & Answers with Detailed
Rationales | Complete Delaware
Master HVACR Restricted Exam Prep,
Study Guide, Test Review &
Qualification Preparation
1. What does a Delaware Master HVACR Restricted license authorize a person
to do?
A. Perform every HVACR specialty without limitation
B. Perform HVACR services in one authorized restricted specialty
C. Perform only residential plumbing
D. Perform electrical contracting only
Answer: Perform HVACR services in one authorized restricted specialty
Rationale: Delaware defines a Master HVACR Restricted license as authorization
to provide services in one specified area, such as air-conditioning, refrigeration,
,forced-air heating/ventilation/gas piping, hydronic heating/gas piping,
commercial hood systems, or gas piping.
2. Which of the following is one of Delaware's recognized HVACR restricted
specialties?
A. Carpentry
B. Masonry
C. Air-conditioning
D. General construction
Answer: Air-conditioning
Rationale: Air-conditioning is specifically listed as one of the restricted HVACR
service areas.
3. Which organization regulates Delaware Master HVACR and Master HVACR
Restricted licenses?
A. Delaware Department of Transportation
B. State Board of Plumbing, Heating, Ventilation, Air Conditioning and
Refrigeration Examiners
C. Delaware State Fire Marshal only
D. Department of Agriculture
Answer: State Board of Plumbing, Heating, Ventilation, Air Conditioning and
Refrigeration Examiners
Rationale: The Delaware Code establishes the State Board as the regulatory
board responsible for HVACR licensing.
4. Which code does Delaware require the Board to adopt for HVACR work?
A. International Mechanical Code
B. International Residential Code only
C. National Electrical Code only
D. Uniform Plumbing Code only
,Answer: International Mechanical Code
Rationale: Delaware law directs the Board to adopt the most recent version of
the International Mechanical Code, subject to permitted modifications.
5. Which fuel-gas code is specifically referenced in Delaware law?
A. International Fuel Gas Code
B. International Fire Code only
C. NFPA 70 only
D. Uniform Solar Code
Answer: International Fuel Gas Code
Rationale: Delaware law requires adoption of the International Fuel Gas Code
along with the International Mechanical Code.
6. Under Delaware law, may an unlicensed apprentice perform HVACR work?
A. Never
B. Yes, when properly supervised under the statutory requirements
C. Only without supervision
D. Only on commercial buildings
Answer: Yes, when properly supervised under the statutory requirements
Rationale: Delaware permits apprentices and certain other workers to perform
HVACR services under the supervision of a qualifying master HVACR or Master
HVACR Restricted licensee who meets the employment requirements.
7. What is one qualification pathway for a Delaware Master HVACR Restricted
applicant?
A. Two years of unrelated construction experience
B. A qualifying journeyman certificate followed by two years of qualifying
experience
C. One year of residential experience only
D. No experience or training
, Answer: A qualifying journeyman certificate followed by two years of qualifying
experience
Rationale: Delaware law recognizes a qualifying journeyman certificate
followed by two years of HVACR or restricted HVACR work under appropriate
supervision as one route toward licensure.
8. Another pathway described by Delaware law involves how many years of
HVACR or restricted HVACR experience before completing the approved
apprenticeship equivalency test?
A. 2 years
B. 3 years
C. 5 years
D. 7 years
Answer: 7 years
Rationale: The statute provides an alternative pathway involving seven years of
qualifying work followed by successful completion of the Board-approved
apprenticeship equivalency test.
9. What refrigerant-handling credential does Delaware require for a Master
HVACR or Master HVACR Restricted applicant?
A. State electrical certification
B. EPA-approved CFC certification at the appropriate level
C. Boiler operator license
D. OSHA forklift certification
Answer: EPA-approved CFC certification at the appropriate level
Rationale: Delaware law requires applicants to be certified at the appropriate
level for handling CFCs by an EPA-approved testing organization.
10.What is the primary purpose of a thermostat in a conventional HVAC
system?
Examination Practice Exam 2026 | 100+
Questions & Answers with Detailed
Rationales | Complete Delaware
Master HVACR Restricted Exam Prep,
Study Guide, Test Review &
Qualification Preparation
1. What does a Delaware Master HVACR Restricted license authorize a person
to do?
A. Perform every HVACR specialty without limitation
B. Perform HVACR services in one authorized restricted specialty
C. Perform only residential plumbing
D. Perform electrical contracting only
Answer: Perform HVACR services in one authorized restricted specialty
Rationale: Delaware defines a Master HVACR Restricted license as authorization
to provide services in one specified area, such as air-conditioning, refrigeration,
,forced-air heating/ventilation/gas piping, hydronic heating/gas piping,
commercial hood systems, or gas piping.
2. Which of the following is one of Delaware's recognized HVACR restricted
specialties?
A. Carpentry
B. Masonry
C. Air-conditioning
D. General construction
Answer: Air-conditioning
Rationale: Air-conditioning is specifically listed as one of the restricted HVACR
service areas.
3. Which organization regulates Delaware Master HVACR and Master HVACR
Restricted licenses?
A. Delaware Department of Transportation
B. State Board of Plumbing, Heating, Ventilation, Air Conditioning and
Refrigeration Examiners
C. Delaware State Fire Marshal only
D. Department of Agriculture
Answer: State Board of Plumbing, Heating, Ventilation, Air Conditioning and
Refrigeration Examiners
Rationale: The Delaware Code establishes the State Board as the regulatory
board responsible for HVACR licensing.
4. Which code does Delaware require the Board to adopt for HVACR work?
A. International Mechanical Code
B. International Residential Code only
C. National Electrical Code only
D. Uniform Plumbing Code only
,Answer: International Mechanical Code
Rationale: Delaware law directs the Board to adopt the most recent version of
the International Mechanical Code, subject to permitted modifications.
5. Which fuel-gas code is specifically referenced in Delaware law?
A. International Fuel Gas Code
B. International Fire Code only
C. NFPA 70 only
D. Uniform Solar Code
Answer: International Fuel Gas Code
Rationale: Delaware law requires adoption of the International Fuel Gas Code
along with the International Mechanical Code.
6. Under Delaware law, may an unlicensed apprentice perform HVACR work?
A. Never
B. Yes, when properly supervised under the statutory requirements
C. Only without supervision
D. Only on commercial buildings
Answer: Yes, when properly supervised under the statutory requirements
Rationale: Delaware permits apprentices and certain other workers to perform
HVACR services under the supervision of a qualifying master HVACR or Master
HVACR Restricted licensee who meets the employment requirements.
7. What is one qualification pathway for a Delaware Master HVACR Restricted
applicant?
A. Two years of unrelated construction experience
B. A qualifying journeyman certificate followed by two years of qualifying
experience
C. One year of residential experience only
D. No experience or training
, Answer: A qualifying journeyman certificate followed by two years of qualifying
experience
Rationale: Delaware law recognizes a qualifying journeyman certificate
followed by two years of HVACR or restricted HVACR work under appropriate
supervision as one route toward licensure.
8. Another pathway described by Delaware law involves how many years of
HVACR or restricted HVACR experience before completing the approved
apprenticeship equivalency test?
A. 2 years
B. 3 years
C. 5 years
D. 7 years
Answer: 7 years
Rationale: The statute provides an alternative pathway involving seven years of
qualifying work followed by successful completion of the Board-approved
apprenticeship equivalency test.
9. What refrigerant-handling credential does Delaware require for a Master
HVACR or Master HVACR Restricted applicant?
A. State electrical certification
B. EPA-approved CFC certification at the appropriate level
C. Boiler operator license
D. OSHA forklift certification
Answer: EPA-approved CFC certification at the appropriate level
Rationale: Delaware law requires applicants to be certified at the appropriate
level for handling CFCs by an EPA-approved testing organization.
10.What is the primary purpose of a thermostat in a conventional HVAC
system?
