EPA 608 Type 2 Practice exam

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