EPA 608 CERTIFICATION EXAM 2024 ACTUAL EXAM COMPLETE QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) / ALREADY GRADED 2025/26 A+

The EPA considers a major repair to be the replacement of what 4 items? -
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answer>>
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1.Evaporator

2. Condenser

3. Compressor

4. Auxillary Heat Exchanger g g




What is EPA 608 Type I certification? - answer>>Persons who maintain, service,
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repair, or dispose of small appliances (containing 5 pounds of refrigerant (or
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less).
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What is EPA 608 Type II certification? - answer>>Persons who maintain,
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service, repair, or dispose of high and very high pressure appliances. Except
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small appliances and motor vehicle air conditioning systems.
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What is EPA 608 Type III certification? - answer>>Persons who maintain,
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service, repair, or dispose of low pressure appliances.
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What is EPA 608 Universal certification? - answer>>Persons who maintain,
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service, repair, or dispose of both low and high pressure equipment, as well as
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appliances.
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HCFC's - answer>>HydroChloroFluoroCarbons
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,What are HydroChloroFluoroCarbons? - answer>>Commonly known as HCFC's,
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they are a group of man-made compunds containing hydrogen, chlorine,
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fluorine, and carbon.
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A recovery cylinder must not be filled more than
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weight? - answer>>80%
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How should refrigerant cylinders be shipped? - answer>>Up-right with proper
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DOT classification tags.
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What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will also work
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with CFC's and HCFC's. - answer>>Polyolester
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HCFC's have very low atmospheric concentrations measured in parts per? -
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answer>>Trillion
g




All cooling systems containing more than 50 lbs. of refrigerant must be
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repaired when the annual leak rate exceeds
g g ? - answer>>15%
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Medium-pressure appliance can use which of the following refrigerants: g g g g g g g g




R-12

R-22
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R-
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123

R-11 - answer>>R-12
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,To Convert From Inches of Mercury To Millimeters of Mercury Absolute
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the Inches of Mercury by 25.4 and _____ the result from 760
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Divide, Subract g




g Multiply, Add g




g Multiply, Subtract g




Divide, Add - answer>>Multiply, Subtract
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When the refrigerant is put back into a Type III chiller, following recovery and
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system repair, where is it added? - answer>>The charging valve on the
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evaporator.
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What method is used to find suspected water tube leaks in chillers? -
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answer>>Hydrostatic (tube) test
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What temperature should be attained when removing oil from a low pressure
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system to ensure a lower level of refrigerants in the oil? - answer>>130-
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Degrees F
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The typical design burst pressure for a rupture disc is what? - answer>>15 PSIG
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Excessive moisture collection in the purge unit can indicate what? -
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answer>>Tube Leakage
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, Vacuum pumps need to be capable of pulling what level of vacuum? -
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answer>>500 microns
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All refrigeration systems containing more than 50 lbs. of refrigerant must be
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repaired when the annual leak rate exceeds
g g ? - answer>>35%g g g g g g g




The most efficient method of leak checking a charged low-pressure system is to
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use? - answer>>Controlled hot water or heater blankets.
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Systems with open drive compressors are prone to leak where? - answer>>At
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the shaft seal.
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What does ASHRAE standard 15 require? - answer>>A refrigerant monitor that
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will sound and alarm and automatically start a ventilation system in
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equipment rooms before the refrigerant concentration reaches the TLV-
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TWA.
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TLV-TWA - answer>>Threshold Limit Value, Time Weighted Average
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A-1 Group Refrigerants only require what? - answer>>Oxygen Deprivation
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Sensor
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All "B" rated refrigerants require what? - answer>>"Refrigerant Specific"
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Mechanical Room Sensor.
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