EPA 608 Type 2 Practice exam with complete solutions

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If a leaking appliance with a regulated refrigerant is not going to be repaired, it must be; A retrofitted or retired within 3 months. B retrofitted or retired within 12 months. C replaced within 3 months. D replaced within 12 months. - Answer- B retrofitted or retired within 12 months. A high-pressure appliance containing 210 lbs. of R-407C refrigerant must be evacuated (recovered) to a level of; A 15 inches of vacuum B 10 inches of vacuum C 4 inches of vacuum D 0 inches of vacuum - Answer- B 10 inches of vacuum What conditions allow for a system to be opened and repaired without recovering the refrigerant to the required vacuum level? A A system with a large leak and internal pressure of 0 psig B A system that is undergoing a major component replacement C A system that uses a CFC refrigerant D A system that has a non-operational compressor - Answer- A A system with a large leak and internal pressure of 0 psig A crankcase heater is often used to prevent refrigerant from mixing with compressor oil during periods of: ALow ambient temperature B High ambient temperature C Low humidity D High humidity - Answer- A Low ambient temperature Leaks must be repaired on industrial process and refrigeration units with a 50-pound charge or greater when the annualized leak rate reaches _____ or more. A 10% B 20% C 30% D 40% - Answer- C 30% When dehydrating a system, it should be evacuated to a minimum level of; A 30 inches of Mercury B 25,000 Microns C 500 Microns D EPA does not have a requirement - Answer- C 500 Microns All HVAC/R systems must be protected by a; A Low-pressure switch B High-pressure switch C Compressor impedance overload D Pressure relief valve - Answer- D Pressure relief valve Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by; A EPA only B Manufacturers approved by UL C EPA approved laboratory D EPA field supervisors - Answer- C EPA approved laboratory Refrigerants CFC-12, HCFC-22, and HFC-134a are all classified as Type _______ substances. A B-1 B B-2 C A-1 D A-2 - Answer- A-1 EPA regulations require that all Industrial Process Refrigeration (IPR) systems containing more than 50 pounds of refrigerant MUST be repaired when the annual leak rate exceeds; A 10 % B 20 % C 30 % D 40 % - Answer- 30 % A high-pressure appliance containing less than 200 lbs. of an HCFC or HFC refrigerant must be evacuated (recovered) to a level of; A 15 inches of vacuum B 10 inches of vacuum C 4 inches of vacuum D 0 inches of vacuum - Answer- 0 inches of vacuum Which of the following refrigerants is classified as a very high-pressure refrigerant? A CFC-11 B R-744 C HCFC-123 D R-410A - Answer- R-744 When recovering refrigerant from a medium-pressure system with more than 200 lbs. of refrigerant, recover to a level of; A 0" Hg B 4" Hg C 10" Hg D 15" Hg - Answer- 15" Hg What can be done with a refrigerant trace gas and nitrogen mixture after a system leak is found? A Recover the mixture. B Recover in a special recovery tank. C Recycle the refrigerant back into the system. D Release to the atmosphere. - Answer- Release to the atmosphere. What happens to a refrigerant that is heated above the saturation temperature? A It remains in the vapor state. B It remains in the liquid state. C It absorbs moisture at an increased rate. D It cools the compressor more efficiently. - Answer- A It remains in the vapor state.

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