EPA 608 Type 2 Practice exam questions with correct answers 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 1 / 2
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
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