100+ Free DE HVAC Practice Questions

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Which Delaware state agency regulates HVAC contractor licensing?

Delaware Department of Labor

Delaware Division of Professional Regulation (DPR)

Delaware Department of Safety

Delaware Building Commission

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Sample DE HVAC Practice Questions

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1Which Delaware state agency regulates HVAC contractor licensing?

A.Delaware Department of Labor

B.Delaware Division of Professional Regulation (DPR)

C.Delaware Department of Safety

D.Delaware Building Commission

Explanation: The Delaware Division of Professional Regulation (DPR), under the Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners, oversees all HVACR licensing in Delaware. The DPR administers exams, processes applications, and enforces regulations.

2What are the two pathways to qualify for a Delaware Master HVACR license?

A.College degree or 3 years experience

B.Journeyman Certificate plus 2 years under a master, OR 7 years experience plus Apprenticeship By-Pass Exam

C.Military service or trade school

D.Bachelor's degree or 10 years experience

Explanation: Delaware offers two pathways to a Master HVACR license: (1) Hold a Journeyman Certificate and complete 2 years of work under a master licensee, or (2) Complete 7 years of experience under a master licensee and pass the Apprenticeship By-Pass Exam. Both pathways require passing the Master HVACR exam.

3What passing score is required on the Delaware Master HVACR examination?

A.60%

B.70%

C.75%

D.80%

Explanation: Delaware requires a minimum passing score of 75% on the Master HVACR examination. The exam is open-book, allowing candidates to use tabbed and highlighted reference materials during the test.

4Is the Delaware Master HVACR exam open-book or closed-book?

A.Closed-book with no references allowed

B.Open-book with approved bound reference materials that may be tabbed and highlighted

C.Open-book with internet access

D.Only a code book is allowed

Explanation: The Delaware Master HVACR exam is open-book. Candidates may bring approved bound reference materials that can be tabbed, highlighted, and annotated. All reference materials must be bound (loose papers are not permitted). This allows candidates to reference codes and technical standards during the exam.

5What additional requirement must a Delaware Master HVACR licensee meet to operate as a contractor?

A.No additional requirements

B.Must also be licensed as a contractor through the Delaware Division of Revenue

C.Must obtain a federal contractor license

D.Must pass a separate business exam

Explanation: A Delaware Master HVACR licensee who wishes to operate as a contractor must also obtain a contractor license through the Delaware Division of Revenue. This ensures the contractor meets business registration, tax compliance, and other business operation requirements in the state.

6Under Delaware Title 24, which board oversees HVACR examiners?

A.Board of Electrical Examiners

B.Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners

C.Board of General Contractors

D.Board of Professional Engineers

Explanation: Delaware Title 24 establishes the Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners to regulate HVACR professionals. The Board sets exam standards, approves continuing education, and enforces licensing regulations under the Division of Professional Regulation.

7What topics does the Delaware Master HVACR exam cover?

A.Only refrigerant handling

B.General Knowledge, Piping, Equipment, System Sizing and Installation, Ventilation and Exhaust Systems, Testing and Inspection

C.Only business management

D.Only electrical systems

Explanation: The Delaware Master HVACR exam covers six major topic areas: General Knowledge (HVAC fundamentals), Piping (materials and installation), Equipment (selection and application), System Sizing and Installation (load calculations and design), Ventilation and Exhaust Systems, and Testing and Inspection procedures.

8What was updated in Delaware's HVACR regulations effective for the 2026 renewal cycle?

A.License fees were eliminated

B.Regulation 5.0 was updated to clarify continuing education requirements

C.All licenses became lifetime licenses

D.Exams were eliminated

Explanation: On March 11, 2025, Delaware updated Regulation 5.0 under Title 24 to further clarify the continuing education requirements that take effect for the 2026 renewal cycle. This ensures HVACR professionals stay current with evolving codes, technologies, and safety practices.

9How can a candidate contact the Delaware Board of Plumbing and HVACR for licensing questions?

A.Only by mail

B.By phone at (302) 744-4500 or through the DPR website at dpr.delaware.gov

C.Only through a lawyer

D.There is no contact available

Explanation: Candidates can contact the Delaware Board of Plumbing and HVACR at (302) 744-4500 or visit the Division of Professional Regulation website at dpr.delaware.gov. The website provides applications, exam information, regulations, and board meeting schedules.

10What experience is required for the Delaware Apprenticeship By-Pass pathway?

A.3 years of experience

B.5 years of experience

C.7 years of experience under a master licensee

D.10 years of experience

Explanation: The Delaware Apprenticeship By-Pass pathway requires 7 years of experience working under a master licensee. This alternative pathway allows individuals without a formal journeyman certificate to qualify for the Master HVACR exam by demonstrating extensive practical experience.

About the DE HVAC Exam

The Delaware Master HVACR exam is an open-book exam covering general knowledge, piping, equipment, system sizing and installation, ventilation and exhaust systems, and testing and inspection. Requires either a journeyman certificate plus 2 years under a master or 7 years experience with the Apprenticeship By-Pass Exam. Contractors must also register with the Division of Revenue.

Questions

100 scored questions

Time Limit

3 hours

Passing Score

75%

Exam Fee

$150-$250 (Delaware Division of Professional Regulation (DPR))

DE HVAC Exam Content Outline

20%

State Laws & Licensing

Delaware DPR regulations, Title 24, continuing education, contractor registration, and business requirements

25%

Trade Knowledge

System sizing, load calculations, equipment selection, refrigerant handling, and duct design

25%

Mechanical Codes

IMC compliance, IECC requirements, gas piping, venting, and combustion air

30%

Safety & Testing

EPA regulations, OSHA safety, testing and inspection procedures, and worker protection

How to Pass the DE HVAC Exam

What You Need to Know

Passing score: 75%
Exam length: 100 questions
Time limit: 3 hours
Exam fee: $150-$250

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

Frequently Asked Questions

Is the Delaware HVACR exam open-book?

Yes. Approved bound reference materials may be tabbed, highlighted, and used during the exam.

What passing score is required?

Delaware requires 75% to pass the Master HVACR examination.

What are the two pathways to the Master license?

Journeyman certificate + 2 years under a master, or 7 years experience + Apprenticeship By-Pass Exam.