EPA 608 Practice Test Core Question Answers 2025 [Online Free]

Last Updated on April 21, 2025

EPA 608 Practice Test Core Question Answers 2025 [Online Free] EPA-approved test to earn the Section 608 Technician Certification core exam – free practice test. This sample online quiz test helps you test your knowledge and prepare for the 608 Technician Certification final exam.

EPA 608 Practice Test Core Question Answers 2025

EPA stands for Environmental Protection Agency
Test Name EPA Certification Test Prep
Section Name 608
Type of test sample test
Type of question multiple-choice
Answers availability Yes
Total question 45
Time limit N/A
Topics EPA 608 Core
See also EPA 608 Certification Exam Practice Test And Study Guide

EPA 608 Practice Test Core

These Practice questions are NOT the actual exam questions. The actual test contains four sections: the Core and sections I, II, and III. Each section includes twenty-five (25) multiple-choice questions. And a minimum score of 70 percent, or 18 out of 25 correct.

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EPA 608 Exam Core Practice Test 1

EPA 608 Exam Test
Free Technician Certification Core Practice Test

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1) What must be done before opening a refrigeration system for maintenance?

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2) Why is it necessary to dehydrate a refrigeration system?

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3) Why should refrigerant cylinders not be filled more than 80%?

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4) Why is it important to use a vacuum pump when evacuating a refrigeration system?

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5) What must be done before starting evacuation?

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6) What do high head pressure readings on a gauge set indicate?

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7) What is the name of the atom that attacks ozone molecules?

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8) What is a refrigerant recovery machine used for?

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9) Why is it important to regularly check and repair refrigerant leaks?

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10) How big should the vacuum hoses be in relation to the pump intake connection?

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11) Name the refrigerant types that belong to CFCs, HCFCs, and HFCs:

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12) What type of oil is commonly used with R-22 refrigerant?

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13) Can you increase the temperature of a refrigeration system for evacuation and if so, what purpose does it have?

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14) Which component is responsible for absorbing heat in a refrigeration system?

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15) What are the risks of inhaling (breathing in) refrigerants?

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16) What safety device is used to prevent over-pressurization in a refrigeration system?

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17) How long and what diameter should the piping connection to the vacuum pump be?

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18) What is the purpose of the condenser in an HVAC system?

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19) What is a common method for leak detection in refrigeration systems?

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20) What are the four factors that affect the evacuation time?

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21) Why is it important to have faster recovery?

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22) What is the primary purpose of a filter-drier in a refrigeration system?

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23) What happens if moisture is left in an operating refrigeration system?

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24) Which refrigerant is a CFC?

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25) What is the primary environmental concern associated with refrigerants?

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26) Which refrigerant contains no chlorine?

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27) What is the ozone layer and why is it important to us on Earth?

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28) Describe how one Chlorine atom can destroy 100,000 ozone molecules.

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29) As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere?

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30) What is the function of the metering device in a refrigeration system?

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31) The atom found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is?

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32) What are the variables that affect the recovery rate?

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33) If you smell a strong odor during recovery, what is most likely the problem?

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34) What type of refrigerant is R-134a classified as?

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35) What safety precaution should be taken when working with refrigerants?

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36) Which refrigerant is an HFC?

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37) What is an ozone molecule made of?

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38) What should be done if a refrigerant cylinder shows signs of rust or damage?

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39) Which of the following is considered a high-pressure refrigerant?

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40) What personal protective equipment should you wear when handling refrigerants?

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41) When should the measurement of vacuum for a system be done and how do we know when dehydration is complete?

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42) After recovery, what are nitrogen and a filter drier used for?

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43) What is the leading cause of refrigeration accidents leading to death?

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44) For accurate vacuum readings, where should the vacuum gauge be located?

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45) What are the requirements under ASHRAE standard 15-1994?

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