The EPA considers a major repair to be the replacement of what 4 items? - answer>>1.Evaporator 2.Condenser 3.Compressor 4.Auxillary Heat Exchanger What is EPA 608 Type I certification? - answer>>Persons who maintain, service, repair, or dispose of small appliances (containing 5 pounds of refrigerant (or less). What is EPA 608 Type II certification? - answer>>Persons who maintain, service, repair, or dispose of high and very high pressure appliances. Except small appliances and motor vehicle air conditioning systems. What is EPA 608 Type III certification? - answer>>Persons who maintain, service, repair, or dispose of low pressure appliances. What is EPA 608 Universal certification? - answer>>Persons who maintain, service, repair, or dispose of both low and high pressure equipment, as well as appliances. HCFC's - answer>>HydroChloroFluoroCarbons What are HydroChloroFluoroCarbons? - answer>>Commonly known as HCFC's, they are a group of man-made compunds containing hydrogen, chlorine, fluorine, and carbon. A recovery cylinder must not be filled more than ___ % of it's capacity by weight? - answer>>80% How should refrigerant cylinders be shipped? - answer>>Up-right with proper DOT classification tags. What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will also work with CFC's and HCFC's. - answer>>Polyolester HCFC's have very low atmospheric concentrations measured in parts per? - answer>>Trillion All cooling systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? - answer>>15% Medium-pressure appliance can use which of the following refrigerants: R-12 R-22 R-123 R-11 - answer>>R-12 To Convert From Inches of Mercury To Millimeters of Mercury Absolute ____ the Inches of Mercury by 25.4 and ____ the result from 760 Divide, Subract Multiply, Add Multiply, Subtract Divide, Add - answer>>Multiply, Subtract When the refrigerant is put back into a Type III chiller, following recovery and system repair, where is it added? - answer>>The charging valve on the evaporator. What method is used to find suspected water tube leaks in chillers? - answer>>Hydrostatic (tube) test What temperature should be attained when removing oil from a low pressure system to ensure a lower level of refrigerants in the oil? - answer>>130- Degrees F The typical design burst pressure for a rupture disc is what? - answer>>15 PSIG Excessive moisture collection in the purge unit can indicate what? - answer>>Tube Leakage Vacuum pumps need to be capable of pulling what level of vacuum? - answer>>500 microns