Free practice test
Free HVAC Practice Test
Take our free HVAC practice test with 20 questions covering EPA 608, refrigeration, and heating systems. Instant scoring with answer explanations.
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- State-specific content
This free HVAC practice test includes 20 multiple-choice questions drawn from the subject areas covered on EPA 608 certification, NATE, and journeyman HVAC licensing exams. Topics include refrigerant regulations, the refrigeration cycle, superheat and subcooling, gas furnace operation, venting, and combustion safety.
After you submit, you will see your score, the correct answer for each question, and a plain-English explanation. Use missed questions to identify the areas you need to review before your exam.
These questions are for study practice only and are not official exam questions. ExamsLib is not an official licensing or certification authority. Passing this practice test does not guarantee a passing score on any certification or licensing exam.
These questions are for study practice only and are not official exam questions.
Question 1
Question 2
What color is the standard low-pressure side (suction) hose on a refrigerant manifold gauge set?
Question 3
Which refrigerant is classified as an HFC and has zero ozone depletion potential (ODP)?
Question 4
What is the primary purpose of recovering refrigerant before opening an HVAC system for repair?
Question 5
A technician finds a system leaking refrigerant. Under EPA Section 608, what is the maximum allowable annual leak rate for a commercial refrigeration system holding more than 50 pounds of refrigerant before repair is required?
Question 6
R-22 is classified under which refrigerant family, and why is it being phased out?
Question 7
Which EPA 608 certification type covers technicians who service small appliances containing five pounds or less of refrigerant, such as household refrigerators and window AC units?
Question 8
During refrigerant recovery from a system with a hermetic compressor larger than 200 horsepower, what is the required vacuum level (inches of mercury) before the system is considered recovered, assuming the recovery machine was manufactured after November 15, 1993?
Question 9
What does the term 'recycling' mean in the context of refrigerant handling under EPA 608?
Question 10
A refrigerant cylinder is painted green. Which refrigerant does this color coding indicate?
Question 11
A technician recovers refrigerant from a large commercial chiller using R-123. After recovery, what vacuum level must be achieved, and which EPA 608 type covers this equipment?
Question 12
A refrigerant blend has a GWP of approximately 2,088 and an ODP of 0. Which blend best matches these characteristics, and what does its high GWP imply for future US regulations?
Question 13
During a standing pressure test using nitrogen, a technician notices the system pressure rises 5 psig over two hours with no refrigerant added. What is the most likely explanation?
Question 14
In the basic refrigeration cycle, which component absorbs heat from the conditioned space and causes the refrigerant to evaporate?
Question 15
What is the function of the compressor in a vapor-compression refrigeration system?
Question 16
What does the term 'superheat' refer to in a refrigeration system?
Question 17
Which component in a split-system air conditioner is typically located outdoors?
Question 18
A technician measures suction pressure on an R-410A system at 118 psig. The pressure-temperature chart shows a saturation temperature of 40 degrees F at that pressure. The suction line temperature at the evaporator outlet reads 50 degrees F. What is the system superheat?
Question 19
A technician measures total system superheat on an R-22 system and finds it is 35 degrees F. What condition does this most likely indicate?
Question 20
What is subcooling, and why is it measured on the high side of a refrigeration system?
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Frequently asked questions
What topics does this HVAC practice test cover?
The practice test covers EPA 608 refrigerant regulations, the basic refrigeration cycle, superheat and subcooling diagnostics, metering devices, heat pump operation, gas furnace ignition sequences, heat exchanger safety, combustion analysis, and venting categories.
Is this practice test the same as the real EPA 608 exam?
No. These questions are for study practice only and are not official exam questions from the EPA or any approved testing organization. ExamsLib is not an official certification authority. Always take the certification exam through an EPA-approved testing organization.
How many questions are on the practice test?
This free practice test contains 20 multiple-choice questions. A passing score for practice purposes is 70 percent or better (14 out of 20 questions correct).
Can I retake the practice test?
Yes. You can take the practice test as many times as you need. A different set of questions may be assembled from the question bank on each attempt.
Do I need an account to take the practice test?
No account or login is required. The practice test is completely free and your results are saved locally in your browser.
