New Jersey Master HVACR Contractor Exam Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
- Unlimited attempts
- A new mix each time
- Instant results
Full Practice Exam
Complete exam simulation matching the real PSI test format.
- 50 questions (same as real exam)
- 130 minute time limit
- 8 topic areas covered
- 247 questions in pool
- Detailed explanations
Texts preferred · 9am–9pm Central
New Jersey Master HVACR Contractor Practice Exam Guide
What's on the exam
Questions per topic, out of 50This practice exam follows the official content outline for the New Jersey Master HVACR Contractor exam: Electrical Knowledge, Motors, and Controls, Piping - Refrigeration, Hydronic, Steam, Process, Heating and Cooling Principles, Theory, and Equipment, Refrigerants and Refrigeration, Fuel and LP Gas, Combustion Air, Chimneys, Flues and Vents, Ducts, Ventilation and Exhaust, Load Calculations.
You have two ways to practice. The free practice exam gives you 10 questions per attempt, and you can retake it as often as you like. The full practice exam gives you 50 questions on a 130 minutes clock, with a new draw from our question bank every attempt.
Electrical Knowledge, Motors, and Controls 7 items
Our study plan for this topic: Ohm's Law and electrical formula calculations (voltage, current, resistance, power); Series, parallel, and combination circuit analysis; Single-phase and three-phase AC motor types and starting methods; Motor capacitors (start and run): selection, testing, and replacement; Motor nameplate data interpretation and full-load/locked-rotor current tables; Motor branch-circuit protection, overload devices, and NEC sizing requirements; Electrical control devices: switches, relays, contactors, and solenoids; Thermostats and pressure controls: range, differential, cut-in/cut-out settings.
Piping - Refrigeration, Hydronic, Steam, Process 7 items
Heating and Cooling Principles, Theory, and Equipment 8 items
Our study plan for this topic: Compression refrigeration cycle components and operation (compressor, condenser, metering device, evaporator); Types and construction of compressors (reciprocating, rotary, scroll, hermetic, semi-hermetic); Gas-fired heating systems: combustion principles, burner types, and furnace operation; Gas furnace efficiency ratings, venting categories, and ignition systems; Oil-fired heating systems: fuel oil properties, combustion testing, and burner components; Electric heating systems: resistance heating principles, element types, and system applications; Air-source and geothermal heat pump operation, components, and efficiency ratings; Absorption and evaporative cooling system principles and components.
Refrigerants and Refrigeration 8 items
Fuel and LP Gas 5 items
Combustion Air, Chimneys, Flues and Vents 5 items
Ducts, Ventilation and Exhaust 5 items
Load Calculations 5 items
Our study plan for this topic: Heating and cooling design temperature selection (indoor/outdoor design conditions, HTD and CTD); Thermal resistance and transmittance values (R-value, U-value, C-value, K-value) for building components; Fenestration load calculations (windows, glass doors, skylights — heating and cooling HTM values, solar heat gain, shading by overhangs and internal/external devices); Opaque panel load calculations (walls, ceilings, floors, doors — U-values, CLTD, heating and cooling HTM values); Infiltration load estimation methods (ACH table method, component leakage area method, blower door method); Duct system load calculations (conduction and leakage losses/gains, duct location and insulation factors); Ventilation load calculations (sensible and latent loads, heat recovery equipment adjustments); Internal, occupant, and supplemental loads (appliances, occupants, blower heat, humidification, hot water piping).
Sample 1 — Heating and Cooling Principles, Theory, and Equipment
Question: Safety and safety relief valves for boilers shall be set at a pressure not greater than what value?
- A. The nameplate pressure rating of the boiler
- B. The design pressure of the piping system
- C. The test pressure of the system
- D. 150% of the operating pressure
Correct Answer: A
Per Section 1006.4, safety and safety relief valves shall be set at not greater than the nameplate pressure rating of the boiler or pressure vessel.
Reference: IMC 2021 Chapter 10, Section 1006.4
Sample 2 — Refrigerants and Refrigeration
Question: You are investigating a suspected refrigerant leak in a system that has urethane insulation around portions of the piping. Which leak detection method is MOST reliable in this situation?
- A. Halide torch
- B. Electronic leak detector
- C. Bubble solution
- D. Ultrasonic leak detector
Correct Answer: C
Because halide torch and electronic leak detectors react to the refrigerant used as an expander in urethane insulation, the bubble test is the most reliable test to use in the presence of urethane insulation.
Reference: Modern Refrigeration and Air Conditioning (22nd ed.), Chapter 11 - Equipment and Instruments for Refrigerant Handling and Service, Page 208 (20th ed.: Page 221)
Sample 3 — Electrical Knowledge, Motors, and Controls
Question: In Ohm's Law, if an electrical appliance is rated at 1200 watts and is connected to 120 volts, how much current will it draw?
- A. 10 amperes
- B. 20 amperes
- C. 5 amperes
- D. 15 amperes
Correct Answer: A
Using the Power Formula (Watt's Law), Amperes = Watts ÷ Volts. Therefore, I = 1200W ÷ 120V = 10 amperes. While commonly grouped with Ohm's Law in electrical references (such as Ugly's Electrical References power wheel), this is technically the Power Formula (P = V × I), solved for current.
Reference: Ugly's Electrical References, 2023 ed., Ohm's Law, Page 1
Treat your first attempt as a checkup, not a verdict. After every attempt, the results page breaks your score down by outline topic, so you can see which topics need work. Compare your score with the real exam's passing score, 70% correct, and keep practicing until you pass consistently.
- Answer what you know first. Go through every question once, answer the ones you know, and bookmark the rest. Our practice exams let you bookmark and come back.
- Come back to your bookmarks. Work them out on your second pass.
- Watch your pace. The real exam works out to about 2 minutes 36 seconds per question.
- Look up every miss. After each attempt, find each missed question's reference in your book and read the section.
| Questions | 50 questions |
| Time limit | 130 minutes |
| Passing score | 70% correct |
| Books in the exam room | Open book |
| Exam fee | The fee is $84 for the HVACR Trade examination and $47 for the Business and Law examination, and fees are not refundable or transferable. |
- Scores are given immediately after the examination, with a successful score report for passers and a diagnostic report of strengths and weaknesses for those who do not pass.
- Candidates who fail may retest an unlimited number of times but must wait 6 months between attempts.
Source: Master HVACR Contractor Licensure Examination Candidate Information Bulletin — New Jersey State Board of Examiners of Heating, Ventilating, Air Conditioning and Refrigeration (HVACR) Contractor, Updated 9/3/2026. Check the bulletin before test day: fees and rules can change.