Delaware Master HVACR Restricted Refrigeration Contractor Exam - Online Practice Questions

Prepare for the Delaware Master HVACR Restricted Refrigeration Contractor examination with online practice questions designed to reinforce refrigeration theory, piping, system sizing, installation, maintenance, testing, inspection, and other technical subjects included in Delaware's restricted refrigeration licensing exam.

This online practice-question product includes 3 months access, giving candidates time to build a consistent study routine, work through refrigeration problems, strengthen code-navigation skills, review weaker subjects, and improve their understanding of refrigeration systems before taking the official examination.

The Delaware Master HVACR Restricted - Refrigeration license is administered through the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. Delaware recognizes Refrigeration as one of its Master HVACR Restricted specialties.

Under Delaware law, a refrigeration system is a system used to cool a surface or area below 55 degrees Fahrenheit or 12.9 degrees Celsius. The current examination bulletin describes the Restricted Refrigeration classification as covering the installation, maintenance, repair, and alteration of refrigeration systems and related appurtenances used for food and product preservation, without a tonnage or horsepower limitation.

The current Delaware Master HVACR Restricted Refrigeration examination contains 75 questions and allows 3 hours for completion. Delaware requires candidates to earn a minimum examination score of 70% to pass. The examination is administered through ProV after the Delaware Board approves the applicant to test.

The examination covers General Knowledge, Piping, Systems and Sizing, Maintenance, and Testing and Inspection. General Knowledge and Systems and Sizing represent significant portions of the exam, while Piping is also a major category. Candidates should be prepared to combine refrigeration theory with practical system knowledge and code application.

The study references associated with this online practice-question product include the International Mechanical Code, 2018 and Modern Refrigeration and Air Conditioning, 22nd Edition. These materials support preparation involving refrigeration systems, mechanical code requirements, components, piping, controls, system sizing, maintenance, testing, and troubleshooting.

Exam Details

The Delaware Master HVACR Restricted - Refrigeration examination contains 75 questions. Candidates receive 3 hours to complete the test.

The current examination content outline includes:

• General Knowledge: 24 questions
• Piping: 19 questions
• Systems & Sizing: 20 questions
• Maintenance: 6 questions
• Testing and Inspection: 6 questions

General Knowledge is the largest individual category with 24 questions. Candidates should understand refrigeration fundamentals, heat transfer, pressure-temperature relationships, refrigerant flow, system components, controls, safety, and terminology used in commercial refrigeration work.

Systems & Sizing accounts for 20 questions. Candidates should understand system capacity, component selection, refrigeration loads, equipment relationships, piping considerations, and the factors that influence proper system design and operation.

Piping accounts for 19 questions, making it another major area of preparation. Study refrigerant piping materials, sizing concepts, installation, support, routing, oil return, insulation, pressure relationships, and system configuration.

Maintenance and Testing and Inspection each account for 6 questions. These categories require practical knowledge of system evaluation, troubleshooting, leak-related concerns, equipment inspection, operational testing, and recognition of improper or unsafe conditions.

Delaware requires candidates to earn at least 70% on the licensure examination.

Open Book Test

The Delaware Master HVACR Restricted Refrigeration examination is an open-book test.

The current ProV Candidate Information Bulletin identifies the International Mechanical Code, 2018 as an approved examination-room reference. It also identifies Modern Refrigeration and Air Conditioning, 21st Edition, or specified substitute study guides, as approved technical references.

The Modern Refrigeration and Air Conditioning, 22nd Edition associated with this online practice-question product is used as a study reference. Candidates should follow the current ProV bulletin for the exact edition permitted inside the examination room.

Open-book testing still requires preparation because candidates cannot afford to search randomly through a reference for every answer. With 75 questions in 3 hours, efficient use of the books is important.

The International Mechanical Code should become familiar for refrigeration-system provisions, machinery-room concepts, mechanical equipment requirements, piping, refrigerants, ventilation, installation, safety, and related code subjects.

The refrigeration textbook should be used to reinforce theory, component function, system operation, troubleshooting, maintenance, and technical relationships that may not be answered by locating a single code section.

Licensing Steps

1. Confirm that the Refrigeration restriction matches your intended scope. Delaware recognizes Refrigeration as a Master HVACR Restricted specialty.
2. Create or access a DELPROS account. Delaware uses DELPROS for professional licensing applications and related services.
3. Submit the Master HVACR Restricted application. Select Refrigeration as the requested specialty.
4. Provide the required experience documentation. Applicants must document qualifying supervised HVACR experience under the pathway that applies to them.
5. Provide apprenticeship documentation when applicable. Applicants using an accepted federally approved HVACR journeyman pathway must submit the applicable completion certificate.
6. Complete the apprenticeship bypass process when required. Applicants without an accepted journeyman certificate may need to complete the portion of the bypass examination applicable to the Refrigeration restriction.
7. Receive Board approval to test. The Delaware Board must approve the applicant before the licensure examination can be scheduled.
8. Register with ProV. Approved candidates receive current testing and scheduling information from ProV.
9. Prepare for the examination. Review General Knowledge, Piping, Systems and Sizing, Maintenance, Testing and Inspection.
10. Take the 75-question examination. Candidates receive 3 hours to complete the test.
11. Earn the required passing score. Delaware requires at least 70%.
12. Complete remaining licensing requirements. The Board must receive the official passing result and verify all applicable licensing requirements before issuing the license.

State Requirements

The Delaware Master HVACR Restricted Refrigeration license is administered through the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners.

Delaware defines a Master HVACR Restricted license as a license that allows an individual to provide HVACR services only within the specialty identified on the license. Refrigeration is one of the recognized restricted classifications.

Delaware law defines a refrigeration system as a system used to cool a surface or area below 55 degrees Fahrenheit or 12.9 degrees Celsius. The current examination bulletin further identifies the restricted refrigeration scope as systems used for food and product preservation, unlimited in tonnage or horsepower.

Applicants seeking licensure by examination must submit a complete application and satisfy the applicable experience requirements before receiving permission to take the Board-approved examination.

Applicants with a Journeyman's Certificate from an apprenticeship program meeting applicable federal standards must provide the certificate and document qualifying post-apprenticeship HVACR experience under the direct supervision of an appropriately licensed master-level professional.

Applicants without an accepted Journeyman's Certificate are subject to a different experience pathway. Delaware's current regulations also allow restricted-license applicants to complete only the relevant portion of the apprenticeship bypass examination for the restriction they are seeking.

The Board must approve the applicant before the licensure examination can be taken. After approval, ProV provides examination scheduling information and the current Candidate Information Bulletin.

Delaware requires a minimum examination score of 70%. Applicants who fail the applicable examination three times are subject to Delaware's reapplication rules before they may receive new approval to test.

Passing the examination alone does not automatically issue the license. The Board must receive the official score and confirm that the applicant has satisfied all remaining experience, application, and licensing requirements.

Reference Books

• International Mechanical Code, 2018
  Supports preparation involving refrigeration systems, machinery-room requirements, refrigerant piping, mechanical equipment, ventilation, installation, system safety, and related mechanical code provisions.
• Modern Refrigeration and Air Conditioning, 22nd Edition
  Supports preparation involving refrigeration cycles, compressors, condensers, metering devices, evaporators, refrigerants, controls, piping, system sizing, troubleshooting, maintenance, testing, and refrigeration-system operation.

Test Information and Study Materials

A strong Delaware Master HVACR Restricted Refrigeration study plan should begin with General Knowledge. With 24 questions, this category makes up the largest individual portion of the current examination.

Refrigeration theory should be a major focus. Candidates should understand how heat moves through a refrigeration system and how the compressor, condenser, metering device, and evaporator work together to transfer heat.

Review pressure-temperature relationships carefully. Refrigeration work frequently requires an understanding of how refrigerant saturation temperature changes with pressure and how this relationship affects diagnosis and system performance.

Superheat and subcooling are also important technical concepts. Candidates should understand what each measurement represents within the refrigeration cycle and why those measurements can provide information about system operation.

Study the function of compressors, including their role in moving refrigerant and creating the pressure relationships needed for the refrigeration cycle. Review common operating symptoms that may indicate compressor or system problems.

Condensers reject heat from the refrigerant. Candidates should understand how airflow or water flow affects condenser performance and how improper heat rejection can change system pressures and operating conditions.

Evaporators absorb heat from the conditioned or refrigerated space. Review airflow, coil condition, refrigerant distribution, frost, defrost, temperature relationships, and the effect of restricted airflow on system performance.

Metering devices regulate refrigerant flow into the evaporator. Candidates should understand their purpose and how refrigerant flow influences evaporator operation and system balance.

Piping accounts for 19 questions. Candidates should understand suction lines, discharge lines, liquid lines, piping materials, insulation, supports, routing, refrigerant velocity, oil return, pressure drop, and appropriate sizing concepts.

Refrigerant piping should not be studied only as a dimensional issue. Pipe size and configuration can influence pressure loss, refrigerant velocity, compressor oil return, system capacity, and overall reliability.

Systems & Sizing accounts for 20 questions. Candidates should understand how refrigeration load, equipment capacity, system design, piping, evaporator conditions, condenser conditions, and component selection affect the complete system.

Commercial refrigeration preparation should include an understanding of how product load, infiltration, ambient conditions, equipment operation, defrost, and other factors can influence refrigeration requirements.

The International Mechanical Code, 2018 should be used actively while practicing. Become familiar with its refrigeration-related provisions instead of depending on random searches during testing.

Code-based preparation can include refrigerant system requirements, machinery-room provisions, ventilation, system safety, equipment location, refrigerant piping, and related mechanical requirements.

Maintenance accounts for 6 questions. Study preventive maintenance, coil cleaning, airflow, refrigerant-system evaluation, controls, electrical components, condensers, evaporators, compressors, and recognition of abnormal operating conditions.

Maintenance questions often require candidates to think through cause and effect. A dirty condenser, restricted evaporator airflow, failed fan, incorrect control operation, or piping problem can change several system conditions at once.

Troubleshooting should focus on understanding the refrigeration cycle rather than memorizing a single symptom for each possible failure. Candidates should look at pressures, temperatures, airflow, refrigerant flow, equipment operation, and control conditions together.

Testing and Inspection accounts for 6 questions. Candidates should prepare for questions involving system evaluation, leak-related procedures, inspections, safety checks, operating verification, and recognition of improper installation.

Testing should be viewed as part of confirming that the refrigeration system is safe, properly installed, and operating as intended. A system that runs is not necessarily a system that has been correctly commissioned or evaluated.

The Modern Refrigeration and Air Conditioning, 22nd Edition associated with this product can be used to strengthen the technical foundation behind practice questions. When a question exposes weakness in refrigeration theory, return to the relevant concept before attempting more questions on the same topic.

For code questions, first determine whether the question is asking about an equipment requirement, installation condition, refrigerant-system rule, machinery-room requirement, ventilation provision, or piping requirement. Then locate the appropriate area of the Mechanical Code.

For troubleshooting questions, write down the known symptoms and consider which component or system condition could logically produce them. Avoid jumping directly to an answer based on a single symptom when the question provides several operating conditions.

For piping questions, visualize the refrigerant path through the complete system. Follow discharge gas from the compressor to the condenser, liquid refrigerant to the metering device, refrigerant through the evaporator, and suction vapor back to the compressor.

When a practice question is missed, classify the reason. The issue may involve refrigeration theory, pressure-temperature relationships, piping, system sizing, mechanical code navigation, maintenance, or testing.

Organizing missed questions into categories makes repeated weaknesses easier to identify. If piping is consistently difficult, concentrate additional study there. If theory questions are weaker, return to the refrigeration cycle, heat transfer, and component functions.

Use the included 3 months access to repeat this process across multiple study cycles. Begin with individual categories, revisit missed questions, and then move into mixed-topic practice that requires switching among theory, piping, sizing, maintenance, testing, and code requirements.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Delaware Master HVACR Restricted Refrigeration candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation when applicable, and confidence-building study structure.

The online practice questions help candidates actively apply refrigeration knowledge rather than relying only on passive reading. Practice can reinforce refrigeration theory, system components, piping, sizing, mechanical code requirements, maintenance, testing, and inspection.

Reference-navigation practice can help candidates become more comfortable locating mechanical code requirements and connecting those requirements to real refrigeration-system situations.

Trade-focused review helps candidates understand complete refrigeration systems. Candidates can practice seeing how compressors, condensers, metering devices, evaporators, piping, controls, pressures, temperatures, and equipment loads work together.

With 3 months access included, candidates can build a consistent preparation routine, revisit difficult technical subjects, and strengthen both refrigeration knowledge and exam-oriented problem-solving skills.

The goal is to help candidates approach the Delaware Master HVACR Restricted Refrigeration examination with stronger trade knowledge, improved code familiarity, better system understanding, and a structured preparation process without guaranteeing a passing score or license approval.

How many questions are on the Delaware Master HVACR Restricted Refrigeration exam?

The current examination contains 75 questions.

How much time is allowed for the exam?

Candidates receive 3 hours to complete the examination.

What score is required to pass?

Delaware requires a minimum examination score of 70%.

Is the Delaware Master HVACR Restricted Refrigeration exam open book?

Yes. The examination is an open-book test using approved references identified by the current ProV Candidate Information Bulletin.

What is the largest exam category?

General Knowledge is the largest category with 24 questions.

How many Systems and Sizing questions are on the exam?

Systems & Sizing accounts for 20 questions.

How many piping questions are on the exam?

Piping accounts for 19 questions.

Does the exam include maintenance?

Yes. Maintenance accounts for 6 questions.

Does the exam include testing and inspection?

Yes. Testing and Inspection accounts for 6 questions.

What books are associated with these online practice questions?

The study references are the International Mechanical Code, 2018 and Modern Refrigeration and Air Conditioning, 22nd Edition.

Can I use Modern Refrigeration and Air Conditioning, 22nd Edition in the exam room?

The current ProV Candidate Information Bulletin identifies Modern Refrigeration and Air Conditioning, 21st Edition as an approved testing reference. The 22nd Edition associated with this product is intended for study preparation unless the current testing bulletin specifically permits it.

How long do I have access to the online practice questions?

This product includes 3 months access.

What does Delaware consider a refrigeration system?

Delaware defines a refrigeration system as one used to cool a surface or area below 55 degrees Fahrenheit or 12.9 degrees Celsius.

Is the Refrigeration license a restricted HVACR specialty?

Yes. Refrigeration is one of the Master HVACR Restricted classifications recognized under Delaware law.

Who regulates the Delaware Master HVACR Restricted Refrigeration license?

The license is administered through the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners.

Who administers the Delaware refrigeration examination?

Delaware currently uses ProV to administer its required Plumbing and HVACR licensure examinations.

Do I need Board approval before taking the examination?

Yes. The Delaware Board must approve the applicant before the Master HVACR Restricted Refrigeration examination can be scheduled.

Does passing the exam automatically issue the license?

No. The Board must also verify that the applicant has satisfied the applicable experience, application, training, and other licensing requirements before issuing the license.

Does this product guarantee that I will pass the Delaware refrigeration exam?

No. These online practice questions are designed to support organized preparation. Examination performance depends on each candidate's experience, study, refrigeration knowledge, code familiarity, and performance on test day.