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EPA 608 CERTIFICATION EXAM 2026\2027
QUESTIONS AND ANSWERS.
When servicing an open refrigeration system, filter drier shall be
always replaced: T or F - CORRECT ANSWER - True
A sensor and alarm are required for A1 (R-12, R-22) refrigerant
as defined by ASHRAE is to sense: - CORRECT ANSWER -
Oxygen depletion
If refrigerant seen at liquid-line sight glass contains bubbles then ,
the charge is probably ________ - CORRECT ANSWER - Low
All refrigeration recovery cylinders must be _____ approved: -
CORRECT ANSWER - DOT
When recovering R-11 and R-23 from a low pressure system, in
order to reduce the time of recovery it has to be recovered in what
state? - CORRECT ANSWER - Liquid
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When using recovery or recycling equipment manufactured or
imported on or after Nov 15, 1993, the required level of
evacuation for low pressure equipment is _____ Hg absolute: -
CORRECT ANSWER - 25mm
Open-drive compressors are typically _____ compressors -
CORRECT ANSWER - Reciprocating
The purge unit takes its suction from the top of the ____ -
CORRECT ANSWER - Condenser
The EPA requires that all commercial and industrial process
refrigeration systems with more than 50lb of refrigerant be
repaired when the annual leak rate exceeds ______% -
CORRECT ANSWER - 35%
Reverse-acting rupture discs, which are installed with the process
pressure against the ______ side of the disc. Convex or
Concave? - CORRECT ANSWER - Convex
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Every ______ months or as required by the manufacturer of your
unit, check the recovery or recycling unit for leaks. - CORRECT
ANSWER - 3
To ensure the purge unit will perform to its published efficiency
rating, verify the unit is ARI-certified to Standard _____ -
CORRECT ANSWER - 580
The temperature at which the non-azeotropic blend first begins to
evaporate? - CORRECT ANSWER - Bubble Point
A halogenated hydrocarbon contains which of the following
halogens:
All the options are correct
Fluorine
Chlorine
Bromine - CORRECT ANSWER - All of the options are correct
Chillers will not be low pressure appliances. T or F - CORRECT
ANSWER - False
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Class I refrigerants have an ozone depletion potential (ODP)
greater than - CORRECT ANSWER - 0.2
Class II refrigerants have an ozone depletion potential (ODP) less
than ___ - CORRECT ANSWER - 0.2
'Asphyxia' refers to displacement of which gas by the denser
refrigerant: - CORRECT ANSWER - Oxygen
One of a group of substances having the same combination of
elements but arranged spatially in different ways: - CORRECT
ANSWER - Isomer
Leak Rate refers to the rate at which an appliance is losing
refrigerant, projected over the period of _____ months: -
CORRECT ANSWER - 12
Hygroscopic oils readily absorb moisture. T or F - CORRECT
ANSWER - True
EPA 608 CERTIFICATION EXAM 2026\2027
QUESTIONS AND ANSWERS.
When servicing an open refrigeration system, filter drier shall be
always replaced: T or F - CORRECT ANSWER - True
A sensor and alarm are required for A1 (R-12, R-22) refrigerant
as defined by ASHRAE is to sense: - CORRECT ANSWER -
Oxygen depletion
If refrigerant seen at liquid-line sight glass contains bubbles then ,
the charge is probably ________ - CORRECT ANSWER - Low
All refrigeration recovery cylinders must be _____ approved: -
CORRECT ANSWER - DOT
When recovering R-11 and R-23 from a low pressure system, in
order to reduce the time of recovery it has to be recovered in what
state? - CORRECT ANSWER - Liquid
, Page | 2
When using recovery or recycling equipment manufactured or
imported on or after Nov 15, 1993, the required level of
evacuation for low pressure equipment is _____ Hg absolute: -
CORRECT ANSWER - 25mm
Open-drive compressors are typically _____ compressors -
CORRECT ANSWER - Reciprocating
The purge unit takes its suction from the top of the ____ -
CORRECT ANSWER - Condenser
The EPA requires that all commercial and industrial process
refrigeration systems with more than 50lb of refrigerant be
repaired when the annual leak rate exceeds ______% -
CORRECT ANSWER - 35%
Reverse-acting rupture discs, which are installed with the process
pressure against the ______ side of the disc. Convex or
Concave? - CORRECT ANSWER - Convex
, Page | 3
Every ______ months or as required by the manufacturer of your
unit, check the recovery or recycling unit for leaks. - CORRECT
ANSWER - 3
To ensure the purge unit will perform to its published efficiency
rating, verify the unit is ARI-certified to Standard _____ -
CORRECT ANSWER - 580
The temperature at which the non-azeotropic blend first begins to
evaporate? - CORRECT ANSWER - Bubble Point
A halogenated hydrocarbon contains which of the following
halogens:
All the options are correct
Fluorine
Chlorine
Bromine - CORRECT ANSWER - All of the options are correct
Chillers will not be low pressure appliances. T or F - CORRECT
ANSWER - False
, Page | 4
Class I refrigerants have an ozone depletion potential (ODP)
greater than - CORRECT ANSWER - 0.2
Class II refrigerants have an ozone depletion potential (ODP) less
than ___ - CORRECT ANSWER - 0.2
'Asphyxia' refers to displacement of which gas by the denser
refrigerant: - CORRECT ANSWER - Oxygen
One of a group of substances having the same combination of
elements but arranged spatially in different ways: - CORRECT
ANSWER - Isomer
Leak Rate refers to the rate at which an appliance is losing
refrigerant, projected over the period of _____ months: -
CORRECT ANSWER - 12
Hygroscopic oils readily absorb moisture. T or F - CORRECT
ANSWER - True
