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EPA Section 608 Universal Certification Exam practice questions

241 free questions with answers and explanations.

Practice test
  1. 101.A technician needs to recover refrigerant from a small appliance that has a completely unknown refrigerant type. What is the safest and most appropriate action the technician should take?Type I (Small Appliances)
  2. 102.A technician is preparing to recover refrigerant from a small appliance. To prevent the intake of air and non-condensables into the recovery equipment and cylinder, what critical step should be performed immediately before connecting to the appliance?Type I (Small Appliances)
  3. 103.A technician is performing a refrigerant recovery on a small appliance. What is the maximum allowable pressure for the recovery cylinder during the recovery process?Type I (Small Appliances)
  4. 104.A technician is performing a recovery on a small appliance with a non-operating compressor. To maximize the recovery rate using a system-dependent device, which of the following actions would be most beneficial?Type I (Small Appliances)
  5. 105.A technician is using a piercing-type access valve to recover refrigerant from a small appliance. After piercing the line, the technician notices that no refrigerant is flowing into the recovery cylinder, and the system gauge shows a low vacuum. What is the MOST likely cause of this issue?Type I (Small Appliances)
  6. 106.A technician is preparing to recover refrigerant from a small appliance that uses R-410A. Which of the following statements about R-410A is TRUE regarding recovery procedures?Type I (Small Appliances)
  7. 107.A technician is connecting a recovery machine to a small appliance. To prevent air and non-condensables from entering the recovery cylinder, what critical step must be performed before opening the valves to the recovery cylinder?Type I (Small Appliances)
  8. 108.A technician is using a piercing-type access valve to recover refrigerant from a small appliance. Where should the piercing valve be installed on the appliance to ensure effective recovery?Type I (Small Appliances)
  9. 109.A technician is recovering refrigerant from a small appliance using a self-contained recovery unit. What should be done with the appliance's compressor if it is still operating?Type I (Small Appliances)
  10. 110.A technician is recovering refrigerant from a small appliance. To prevent the intake of air and non-condensables into the recovery machine and cylinder, what is the correct procedure before opening the recovery cylinder valve?Type I (Small Appliances)
  11. 111.A technician is recovering refrigerant from a small appliance. If the appliance contains a non-condensable gas, such as air, what effect will this have on the recovery process and equipment?Type I (Small Appliances)
  12. 112.A technician is preparing to recover refrigerant from a small appliance that uses R-134a. The appliance has a non-operating compressor. Which of the following is the most effective method to recover the refrigerant?Type I (Small Appliances)
  13. 113.A technician is performing a refrigerant recovery on a small appliance. What is the maximum allowable amount of refrigerant that can be left in the appliance after recovery using a system-dependent (passive) recovery method?Type I (Small Appliances)
  14. 114.A technician is performing a recovery on a small appliance with a non-operating compressor. To achieve the required vacuum level more quickly, what technique could be employed?Type I (Small Appliances)
  15. 115.A technician is performing a recovery on a small appliance containing R-134a. The recovery machine has an automatic non-condensable purge feature. When should this feature typically be activated during the recovery process?Type I (Small Appliances)
  16. 116.A technician is recovering R-290 (propane) from a small appliance. Which of the following is an essential safety precaution specific to working with flammable refrigerants like R-290?Type I (Small Appliances)
  17. 117.A technician is using a system-dependent (passive) recovery device on a small appliance with an operating compressor. To maximize the recovery rate, what action should the technician take?Type I (Small Appliances)
  18. 118.A technician is preparing to recover R-134a from a small domestic refrigerator. Which of the following statements about the recovery cylinder is most accurate?Type I (Small Appliances)
  19. 119.A technician is performing a recovery from a small appliance that has a completely evacuated system due to a large leak. According to EPA regulations, which of the following actions is required?Type I (Small Appliances)
  20. 120.A technician is performing a recovery on a small appliance that uses R-410A. The recovery machine has a non-condensable gas purge feature. When should the technician activate this feature?Type I (Small Appliances)
  21. 121.A technician is performing a leak check on a small appliance that uses R-290 (propane). Which of the following leak detection methods is LEAST recommended for this hydrocarbon refrigerant?Type I (Small Appliances)
  22. 122.A technician is recovering refrigerant from a small appliance with a non-operating compressor. The appliance contains 3 ounces of R-22. Which of the following recovery requirements applies to this situation?Type I (Small Appliances)
  23. 123.A technician is storing recovered R-134a from a small appliance. What is the most important characteristic required for the storage cylinder?Type I (Small Appliances)
  24. 124.A technician is recovering refrigerant from a small appliance. The recovery equipment must be capable of recovering 90% of the refrigerant when the compressor is operating or achieving a 4-inch mercury vacuum. What is the maximum allowable leakage rate for this recovery equipment, as per EPA regulations?Type I (Small Appliances)
  25. 125.A technician is performing a recovery on a small appliance containing an unknown refrigerant. What is the most appropriate action the technician should take before starting the recovery process?Type I (Small Appliances)
  26. 126.A technician is preparing to recover refrigerant from a small appliance. Before beginning the recovery process, what is the MOST important step to take regarding the appliance's power supply?Type I (Small Appliances)
  27. 127.A technician is preparing to recover refrigerant from a small appliance. To prevent the introduction of air into the recovery cylinder during connection, what is the best practice?Type I (Small Appliances)
  28. 128.A technician needs to recover refrigerant from a small appliance that has an unknown refrigerant type. What is the correct procedure before proceeding with recovery?Type I (Small Appliances)
  29. 129.A technician is using a system-dependent recovery device on a small appliance with an operating compressor. Which of the following best describes how the compressor assists in the recovery process?Type I (Small Appliances)
  30. 130.A technician is using a system-dependent (passive) recovery device on a small appliance with a non-operating compressor. Which of the following is crucial for maximizing the recovery of refrigerant from the appliance?Type I (Small Appliances)
  31. 131.A technician is performing a leak repair on a small appliance containing R-410A. After repairing the leak, evacuating the system, and recharging, how long must the technician keep records of the disposal of the appliance or the quantity of refrigerant recovered?Type I (Small Appliances)
  32. 132.A client calls with a small appliance (e.g., domestic refrigerator) that has a completely evacuated system, indicating a significant leak. What is the EPA requirement for repairing this leak before charging?Type I (Small Appliances)
  33. 133.A technician is performing a recovery on a small appliance that uses R-290 (propane). Which of the following statements about using a manifold gauge set for this procedure is true?Type I (Small Appliances)
  34. 134.A technician is transporting a recovery cylinder containing recovered R-410A from a small appliance. What is the maximum fill level for this recovery cylinder to prevent overfilling and ensure safety during transport?Type I (Small Appliances)
  35. 135.A technician is replacing a component on a small appliance that uses R-600a (isobutane). What is a critical safety precaution to take before beginning any work that could release refrigerant?Type I (Small Appliances)
  36. 136.A technician is installing a new compressor in a small appliance that uses R-134a. After replacing the compressor, what is the primary purpose of evacuating the system to a deep vacuum?Type I (Small Appliances)
  37. 137.Which of the following statements accurately describes the primary environmental concern associated with HFC refrigerants?Core
  38. 138.Which of the following refrigerants has the lowest Ozone Depletion Potential (ODP)?Core
  39. 139.A technician is installing a new commercial refrigeration system using R-404A. What is the primary reason that fractional distillation of the refrigerant can occur if the system develops a leak?Core
  40. 140.Which of the following statements about the Montreal Protocol is true?Core
  41. 141.A technician is evacuating a low-pressure chiller before charging. The primary purpose of evacuating the system to a deep vacuum is to:Type III (Low-Pressure Appliances)
  42. 142.A technician observes that a low-pressure chiller's purge unit is continuously running. What is the most likely cause for this condition?Type III (Low-Pressure Appliances)
  43. 143.A technician is performing a leak test on a low-pressure chiller operating with R-123. If the system is found to be leaking, what is the maximum amount of time allowed to repair the leak and verify the repair before EPA regulations require the appliance to be retrofitted or retired?Core
  44. 144.When charging a low-pressure chiller, why is it critical to introduce refrigerant into the system as a vapor until the system pressure rises above 0 psig?Type III (Low-Pressure Appliances)
  45. 145.A technician is preparing to recover refrigerant from a system that uses R-134a. Which type of recovery device is generally preferred for its ability to pull a deeper vacuum and faster recovery times?Core
  46. 146.A technician is leak testing a low-pressure chiller after repairs. Which of the following pressure ranges is acceptable for pressurizing the system with controlled nitrogen for leak detection, without causing damage?Type III (Low-Pressure Appliances)
  47. 147.A technician is preparing to recover refrigerant from a system that has experienced a compressor burnout. Which of the following precautions should be taken immediately before recovery?Core
  48. 148.A technician is performing a recovery of R-123 from a low-pressure chiller. Which of the following statements about the recovery process is true?Type III (Low-Pressure Appliances)
  49. 149.A technician is preparing a low-pressure system for a leak test using nitrogen. What is the maximum pressure to which the system should be pressurized with nitrogen for a leak test?Type III (Low-Pressure Appliances)
  50. 150.A technician is preparing to recover refrigerant from a system that uses a blend. Why is it important to recover refrigerant blends into a separate, designated recovery cylinder?Core