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EPA 608 Core Questions & Answers
All 75 Core section questions, each with the correct answer and an explanation. Core is mandatory for every EPA 608 certification.
Clean Air Act & Montreal Protocol3
Dehydration & Evacuation3
Ozone Depletion9
- Which of the following refrigerants has the highest Ozone Depleting Potential (ODP)?
- Where is the ozone layer located?
- What does the ozone layer protect us from?
- Which element in refrigerants is primarily responsible for ozone depletion?
- What type of refrigerant is R-22?
- What happens to CFCs and HCFCs when they reach the stratosphere?
- How many ozone molecules can one chlorine atom destroy?
- What health problems can increased UV radiation cause?
- What is the ODP of HFC refrigerants like R-134a?
Recover, Recycle, Reclaim4
Recovery Techniques8
- Why is it important to never mix refrigerants?
- What type of recovery equipment must be used for refrigerants?
- What must recovery equipment be capable of achieving?
- What is the required recovery efficiency for small appliance recovery equipment manufactured after November 15, 1993 when the compressor is operating?
- What is a self-contained recovery device?
- What is a system-dependent recovery device?
- What should be done before recovering refrigerant from a system with a burned-out compressor?
- What type of vacuum pump oil should typically be used?
Refrigeration Fundamentals11
- Which component separates the high-pressure and low-pressure sides of a refrigeration system?
- What is the function of the compressor in a refrigeration system?
- What is the function of the evaporator in a refrigeration system?
- What is the function of the condenser in a refrigeration system?
- What is the 'superheat' in a refrigeration system?
- What is 'subcooling' in a refrigeration system?
- What is the saturation temperature of a refrigerant?
- What is latent heat?
- What is sensible heat?
- What happens to refrigerant pressure when temperature increases?
- What is the purpose of a filter-drier in a refrigeration system?
Safety8
- What are the two factors that, if present, are most likely to lead to an explosion with hydrocarbon refrigerants?
- What hazard exists when using nitrogen to pressurize a system for leak testing?
- Why should oxygen or compressed air never be used to pressurize a refrigeration system?
- What should you do if a large refrigerant leak occurs in an enclosed space?
- What personal protective equipment should be worn when handling refrigerants?
- What type of equipment should be used to detect refrigerant leaks?
- What is the danger of applying an open flame to a refrigerant leak?
- What is the first action to take if a refrigerant cylinder is exposed to fire?
Section 608 Regulations11
- What is the maximum fine for knowingly venting refrigerants?
- Which of the following refrigerants may be vented during normal operations?
- What organization certifies technicians to handle refrigerants?
- How long must technicians keep records of refrigerant recovery?
- Who may purchase regulated refrigerants?
- What is the EPA's definition of a 'small appliance'?
- When can refrigerant be added to a system that is known to have a leak?
- What does SNAP stand for?
- What is the 'de minimis' venting exception?
- When must refrigerant be recovered before disposing of equipment?
- What is the purpose of EPA's refrigerant management regulations?
Shipping & Transport5
Substitute Refrigerants & Oils13
- Polyolester (POE) oil is used with which type of refrigerants?
- What is the Global Warming Potential (GWP) used to measure?
- What type of refrigerant is R-410A?
- At what pressure does R-410A typically operate on the high side compared to R-22?
- What is a 'blend' refrigerant?
- What is 'fractionation' of a refrigerant blend?
- How should zeotropic refrigerant blends be charged?
- What does an azeotropic refrigerant blend mean?
- What does a zeotropic refrigerant blend mean?
- What is 'temperature glide' in zeotropic blends?
- What type of oil is typically used with CFC and HCFC refrigerants?
- Why must POE oil be handled carefully?
- Why are HFCs still considered environmental concerns despite having zero ODP?
Exam-style practice questions. Not official EPA exam questions.