Delaware Master HVACR Restricted Air Conditioning Contractor Exam - Online Exam Prep

Prepare for the Delaware Master HVACR Restricted Air Conditioning examination with structured online exam prep focused on mechanical systems, fuel-gas requirements, refrigeration principles, air-conditioning equipment, residential load calculations, commercial load calculations, piping, plan reading, system sizing, installation, maintenance, and troubleshooting.

This online exam-preparation program is designed for experienced air-conditioning technicians, refrigeration professionals, HVACR supervisors, journeypersons, qualifying applicants, and other candidates pursuing the Delaware Master HVACR Restricted Air Conditioning license. It provides an organized way to review the technical subjects associated with the examination while developing stronger open-book navigation and calculation skills.

The course supports preparation with the International Mechanical Code, 2018; International Fuel Gas Code, 2018; Modern Refrigeration and Air Conditioning, 22nd Edition; Manual N – Commercial Load Calculation for Small Commercial Buildings, 5th Edition; and Residential Load Calculation – Manual J, 8th Edition.

Each reference supports a different part of the exam. The International Mechanical Code addresses mechanical equipment, ventilation, exhaust, duct systems, refrigeration installations, boilers, combustion air, chimneys, vents, and related requirements. The International Fuel Gas Code covers fuel-gas piping, appliances, regulators, combustion air, venting, testing, and installation safety.

Modern Refrigeration and Air Conditioning provides broad technical coverage of refrigeration cycles, air-conditioning systems, heat pumps, compressors, condensers, evaporators, metering devices, electrical controls, installation, maintenance, and troubleshooting. Manual N supports load calculations for small commercial buildings, while Manual J supports residential heating and cooling load calculations.

The online format allows candidates to organize their preparation around work and personal responsibilities. Students can revisit difficult subjects, repeat calculations, review equipment concepts, and practice locating information in the listed references.

This product provides online exam preparation only. The listed books are reference materials used with the course and are not included unless purchased separately. Candidates should obtain the correct editions and use them throughout their preparation so their reference-navigation practice aligns with the examination materials.

Exam Details

The Delaware Master HVACR Restricted Air Conditioning examination is part of the professional licensing process overseen by the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. Applicants pursuing licensure by examination must receive Board approval before scheduling the test with the approved examination provider.

The examination tests knowledge associated with the design, installation, maintenance, repair, fabrication, alteration, and extension of air-conditioning and refrigeration systems. Its scope also includes piping vessels, warm-air heating, boilers, ventilation systems, duct systems, insulation, and related components within complete systems.

The examination contains 95 questions, and candidates are allowed four hours to complete it. The passing score is 70 percent. Candidates should develop a pacing strategy that allows time for direct-answer questions, calculations, plan interpretation, reference searches, and final review.

The examination outline includes General Knowledge, Plan Reading, Systems and Sizing, Piping, Equipment, and Maintenance. Candidates must combine practical trade experience with technical knowledge, calculation ability, and efficient use of the approved references.

General Knowledge includes 22 questions. Preparation should address refrigeration principles, heat transfer, temperature, pressure, humidity, airflow, electrical fundamentals, combustion, safety practices, tools, insulation, system operation, and commonly used HVACR terminology.

Plan Reading includes eight questions. Candidates may need to interpret mechanical symbols, equipment schedules, duct layouts, piping routes, load information, dimensions, system notes, equipment locations, and installation details.

Systems and Sizing includes 17 questions. Study should include residential and commercial load calculations, equipment selection, airflow requirements, system capacity, duct sizing, indoor and outdoor design conditions, building characteristics, ventilation loads, and performance considerations.

Piping includes 14 questions. Candidates should review refrigerant piping, fuel-gas piping, approved materials, joining procedures, supports, valves, regulators, sizing methods, pressure considerations, testing, and protection from physical damage.

Equipment includes 18 questions. Preparation should cover compressors, condensers, evaporators, metering devices, heat pumps, air handlers, furnaces, refrigeration equipment, motors, controls, safety devices, and other air-conditioning components.

Maintenance includes 16 questions. Candidates should understand system testing, troubleshooting, refrigerant-side evaluation, electrical checks, airflow measurements, leak detection, equipment cleaning, control verification, startup procedures, and preventive maintenance.

Open Book Test

The Delaware Master HVACR Restricted Air Conditioning examination is an open-book test. Candidates may use authorized printed reference materials during testing under the examination provider’s current rules.

An open-book format does not remove the need for focused preparation. The listed references contain extensive technical information, and candidates cannot depend on researching every question from the beginning. Strong preparation combines air-conditioning knowledge with calculation ability and efficient reference navigation.

The International Mechanical Code should be used for questions involving mechanical equipment, ventilation, exhaust, duct construction, refrigeration systems, warm-air heating, boilers, combustion air, chimneys, vents, equipment clearances, supports, and installation requirements.

The International Fuel Gas Code supports questions involving gas-piping materials, pipe sizing, regulators, shutoff valves, appliance connections, combustion air, venting, pressure testing, and fuel-gas installation safety.

Modern Refrigeration and Air Conditioning supports technical questions involving refrigeration cycles, refrigerants, compressors, condensers, evaporators, metering devices, heat pumps, air-conditioning equipment, heating systems, motors, electrical controls, troubleshooting, installation, and maintenance.

Manual N supports heating and cooling load calculations for small commercial buildings. Candidates should understand how building construction, occupancy, lighting, equipment, ventilation, infiltration, windows, orientation, and design conditions affect calculated loads.

Manual J supports residential heating and cooling load calculations. Study should include insulation, windows, doors, building orientation, infiltration, climate, occupancy, internal heat gains, and other factors that influence system capacity.

The course encourages candidates to practice choosing the correct reference before beginning a search. A mechanical installation question may lead to the International Mechanical Code, while a gas-piping question may require the International Fuel Gas Code. A refrigeration or equipment question may be easier to research in Modern Refrigeration and Air Conditioning.

Residential load questions may require Manual J, while small commercial load questions may require Manual N. Learning these distinctions can reduce unnecessary searching during timed testing.

Candidates should read references in context. Definitions, exceptions, table notes, equipment conditions, and related provisions can affect the answer. Selecting a response from one isolated sentence without reviewing the surrounding material may lead to an incorrect interpretation.

Reference materials must comply with the current testing rules. Candidates should review the latest instructions concerning tabs, highlighting, handwritten notes, inserts, loose paper, photocopies, removable markers, calculators, and other test-day materials.

Licensing Steps

Begin by confirming that the Delaware Master HVACR Restricted Air Conditioning classification matches the work you intend to perform. A restricted license permits services only within the specialty identified on the license.

Create an account through Delaware Professional Regulation Online Services and begin the applicable Master HVACR Restricted application in DELPROS. Delaware professional licensing applications and supporting records are submitted through the state’s online system.

Gather the documentation required for the licensing pathway. Supporting records may include professional license verification, apprenticeship documents, employment records, certification information, and other materials requested by the Delaware Board.

Applicants for the restricted air-conditioning classification must provide a copy of their CFC Certification card. Applicants must also document the qualifying education, apprenticeship, and work experience required for their application pathway.

An applicant with an acceptable journeyman certificate must provide the apprenticeship program Certificate of Completion and proof of at least two years of qualifying work experience under the supervision of a master licensee after receiving the certificate.

An applicant without an acceptable journeyman certificate must provide proof of at least seven years of qualifying work experience under the supervision of a master licensee. The Board determines whether the applicant must also complete the applicable Apprenticeship By-Pass Examination.

Submit the completed application and all required attachments through DELPROS. The Board must review and approve the application before the candidate can schedule the Master HVACR Restricted Air Conditioning examination.

After receiving approval, follow the examination provider’s registration and scheduling instructions. Review appointment procedures, identification requirements, calculator policies, approved references, and book-preparation rules before selecting a test date.

Use the online course and listed references to prepare. Complete technical review, plan-reading exercises, residential and commercial load calculations, code-navigation practice, piping study, equipment review, and maintenance questions.

Complete the examination and earn a score of at least 70 percent. Official examination results are reported through the testing and licensing process.

Finish any remaining licensing requirements after passing. Passing the examination is one part of the process and does not automatically issue a license when documentation or other application requirements remain outstanding.

State Requirements

Delaware requires professionals providing regulated HVACR services to hold the appropriate state license unless a specific legal exemption applies. Holding a license in another jurisdiction does not automatically authorize HVACR work in Delaware.

A Master HVACR Restricted license permits services only within the specialty shown on the license. Delaware restricted specialties include forced-air heating, ventilation and gas piping; hydronic heating and gas piping; commercial hood systems; refrigeration; air conditioning; and gas piping.

The restricted air-conditioning classification applies to work within Delaware’s air-conditioning specialty. Professionals planning to perform work across multiple restricted specialties should review the unrestricted Master HVACR classification.

The restricted air-conditioning examination addresses air-conditioning and refrigeration systems, piping vessels, warm-air heating, boilers, ventilation systems, duct systems, insulation, and related components within complete systems.

Applicants must provide complete, accurate, and consistent supporting documentation. Missing employment records, incomplete certification information, or conflicting application details may delay Board review and examination authorization.

Employment experience is generally verified by a supervisor. When standard supervisor verification cannot be obtained, alternative documentation may be submitted as permitted by the licensing process. Acceptance of the documentation remains subject to Board review.

A Master HVACR Restricted Air Conditioning license does not automatically authorize plumbing work involving systems used to bring water into a building or remove liquid and water-carried waste. Separate plumbing authority may be required for that work.

The Delaware Board determines whether an applicant qualifies for examination and licensure. The examination provider administers the test but does not decide whether an applicant satisfies Delaware’s professional licensing requirements.

Applicants who do not pass after three examination attempts must reapply and obtain Board approval before testing again. Applicable waiting requirements must also be satisfied.

Delaware Plumbing and HVACR licenses expire on October 31 of even-numbered years. Licensees must complete the renewal process and satisfy the continuing education requirements associated with their licensing period.

A Delaware professional HVACR license is separate from a business license. Individuals planning to operate an air-conditioning contracting company may also need a legal business entity, business registration, tax accounts, insurance, and other operational approvals.

Reference Books

• International Mechanical Code, 2018
  This code supports study of mechanical equipment, ventilation, exhaust systems, duct construction, refrigeration, warm-air heating, boilers, combustion air, chimneys, vents, clearances, supports, and related installation requirements.
• International Fuel Gas Code, 2018
  This code supports preparation involving fuel-gas piping, appliance connections, pressure regulators, shutoff valves, combustion air, venting, pressure testing, sizing tables, approved materials, and installation safety.
• Modern Refrigeration and Air Conditioning, 22nd Edition
  This comprehensive technical reference covers refrigeration, air conditioning, heating, heat pumps, electrical controls, motors, equipment, tools, installation, troubleshooting, maintenance, and service procedures.
• Manual N – Commercial Load Calculation for Small Commercial Buildings, 5th Edition
  This reference supports commercial heating and cooling load calculations using construction data, occupancy, lighting, equipment, ventilation, infiltration, climate, orientation, and design conditions.
• Residential Load Calculation – Manual J, 8th Edition
  This reference supports residential heating and cooling load calculations using building construction, insulation, windows, doors, orientation, infiltration, climate, occupancy, and internal heat gains.

The reference books are not included with this online exam-preparation course unless purchased separately. Candidates should use the listed editions throughout their preparation so course study, calculations, and navigation practice remain aligned with the examination references.

Test Information and Study Materials

Begin preparation with refrigeration and air-conditioning fundamentals. Review heat transfer, pressure-temperature relationships, refrigeration cycles, refrigerant flow, compressors, condensers, evaporators, metering devices, superheat, subcooling, airflow, humidity, and troubleshooting.

Study mechanical-code subjects involving equipment installation, ventilation, exhaust, duct construction, refrigeration machinery, boilers, combustion air, clearances, supports, chimneys, vents, and equipment-room requirements.

Review fuel-gas systems, including piping materials, sizing, appliance connections, regulators, shutoff valves, combustion air, venting, pressure testing, and installation safety. Practice reading table headings, notes, and conditions carefully.

Practice residential and commercial load calculations. Learn how construction, insulation, windows, orientation, occupancy, lighting, equipment, ventilation, infiltration, and design temperatures affect heating and cooling loads.

Strengthen plan-reading skills by reviewing mechanical symbols, equipment schedules, duct layouts, piping routes, dimensions, system notes, equipment locations, and load information.

Review piping subjects such as approved materials, line sizing, joining procedures, supports, pressure considerations, testing, valves, regulators, and protection from damage.

Study equipment operation and maintenance. Review compressors, coils, air handlers, heat pumps, furnaces, refrigeration components, motors, controls, test instruments, electrical checks, airflow measurements, leak detection, cleaning, and preventive maintenance.

Complete timed reference-navigation exercises with all five books. Identify the subject, choose the most appropriate reference, locate the applicable material, and review the complete provision or calculation procedure.

Keep a record of missed practice questions. Determine whether each error resulted from a technical knowledge gap, calculation mistake, incorrect reference selection, overlooked table note, or misunderstanding of the question.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Delaware Master HVACR Restricted Air Conditioning candidates organize their preparation through structured online study guidance, trade-focused review, calculation practice, reference-navigation training, and confidence-building activities.

The course divides the examination into manageable areas, including General Knowledge, Plan Reading, Systems and Sizing, Piping, Equipment, and Maintenance. This structure helps candidates identify strong areas and subjects that need additional review.

Students can strengthen refrigeration and air-conditioning knowledge, review mechanical and fuel-gas requirements, practice residential and commercial load calculations, and improve their ability to interpret plans and equipment information.

Reference-navigation guidance helps candidates become more familiar with the International Mechanical Code, International Fuel Gas Code, Modern Refrigeration and Air Conditioning, Manual N, and Manual J.

Practice-oriented preparation encourages candidates to apply the material instead of only reading it. Code searches, load calculations, plan-reading exercises, piping questions, equipment scenarios, and maintenance review support a more active study process.

The online format allows students to revisit difficult subjects and repeat activities as needed. Candidates can build a study routine that fits around employment and other responsibilities while continuing to strengthen weaker areas.

1 Exam Prep does not guarantee a passing score, examination result, or license approval. The course provides organized preparation support for candidates working toward the Delaware Master HVACR Restricted Air Conditioning examination.

Frequently Asked Questions

What does the online exam prep cover?

The course supports preparation in general HVACR knowledge, plan reading, residential and commercial system sizing, piping, equipment, maintenance, mechanical-code requirements, fuel-gas provisions, refrigeration, and air-conditioning systems.

Is the Delaware restricted air-conditioning examination open book?

Yes. The examination is open book and permits authorized printed references under the examination provider’s current rules.

How many questions are on the examination?

The Delaware Master HVACR Restricted Air Conditioning examination contains 95 questions.

How much time is allowed?

Candidates are allowed four hours to complete the examination.

What score is required to pass?

A minimum score of 70 percent is required to pass the examination.

Which reference books should I use?

Candidates should prepare with the International Mechanical Code, International Fuel Gas Code, Modern Refrigeration and Air Conditioning, Manual N, and Manual J in the listed editions.

Are the reference books included with the course?

No. This product provides online exam preparation. The reference books are not included unless purchased separately.

Why are both Manual N and Manual J used?

Manual N supports heating and cooling load calculations for small commercial buildings, while Manual J supports residential heating and cooling load calculations.

Does the course include Application Service?

No. Application Service is not included with this standard online exam-preparation product unless purchased through another package.

Can I complete the course from home?

Yes. The online course can be accessed from a suitable location with a reliable internet connection.

Should I practice with every listed reference?

Yes. Regular practice helps candidates identify which publication addresses each subject and improves their ability to locate information during a timed examination.

Does completing the course automatically issue a license?

No. Candidates must satisfy the Delaware application requirements, receive examination authorization, pass the official examination, and obtain approval through the state licensing process.

Does the course guarantee a passing score?

No. The course provides structured study guidance and practice support, but examination results depend on the candidate’s knowledge, preparation, navigation ability, and performance.