1|Page
EPA 608 Certification Exam Test Questions with
100% Verified Correct Answers
1.Household refrigerators
2.Household freezers
3.Room air conditioners
4.Water Coolers
5.Drinking fountains - ...ANSWER✓✓✓What are 5 Type I appliances?
1.Walk-in coolers
2.Walk-in freezers
3.Reach-in refrigerators
4.Reach-in freezers
5.Residential & Commercial comfort cooling systems
6.Ice machines - ...ANSWER✓✓✓What are 6 Type II appliances?
1/1,000 - ...ANSWER✓✓✓Micron is _____ of a millimeter of mercury
vacuum
10 - ...ANSWER✓✓✓Typical AC compressors are limited to about
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_______ tons of cooling capacity
10 psig - ...ANSWER✓✓✓What is the maximum test pressure to use for
pressurizing Type III centrifugal systems with nitrogen?
10 psig when evacuating the refrigerant from a low pressure chiller
(rupture disc at 15psig) - ...ANSWER✓✓✓A recovery unit's high
pressure cut-out is set for (Psig for Type III):
100 pounds of vapor - ...ANSWER✓✓✓A substantial amount of vapor
will remain in the appliance after all the liquid is removed. An average
350 ton R-11 chiller at 0 psig still contains what amount of vapor?
12 - ...ANSWER✓✓✓Leak Rate refers to the rate at which an appliance
is losing refrigerant, projected over the period of _____ months:
130 degrees F - ...ANSWER✓✓✓When removing oil from a
lowpressure system, a temperature of what must be attained?
130-Degrees F - ...ANSWER✓✓✓What temperature should be attained
when removing oil from a low pressure system to ensure a lower level of
refrigerants in the oil?
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15 Lbs of refrigerant or less - ...ANSWER✓✓✓System-Dependent
devices may only be used on appliances containing how much
refrigerant?
15 PSIG - ...ANSWER✓✓✓The typical design burst pressure for a
rupture disc is what?
15% - ...ANSWER✓✓✓All cooling systems containing more than 50
lbs. of refrigerant must be repaired when the annual leak rate
exceeds___?
15% - ...ANSWER✓✓✓Comfort cooling appliances containing more
than 50 lbs of refrigerant must be repaired when the annual leak rate
exceeds _____%
16.9" hg. vacuum or 36 degrees F. - ...ANSWER✓✓✓Before charging
with liquid, how much pressure does an R-11 refrigeration system
require (vapor pressure), and how much saturation temperature?
2020 - ...ANSWER✓✓✓HFC's will be Phased out by?
, 4|Page
25mm - ...ANSWER✓✓✓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:
3 - ...ANSWER✓✓✓Every ______ months or as required by the
manufacturer of your unit, check the recovery or recycling unit for leaks.
30-? - ...ANSWER✓✓✓Mesosphere is?
35% - ...ANSWER✓✓✓All refrigeration systems containing more than
50 lbs. of refrigerant must be repaired when the annual leak rate
exceeds___?
35% - ...ANSWER✓✓✓Commercial and Industrial process refrigeration
containing ore than 50 lbs of refrigerant must be repaired when the
annual leak rate exceeds _____%
35% - ...ANSWER✓✓✓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 ______%
EPA 608 Certification Exam Test Questions with
100% Verified Correct Answers
1.Household refrigerators
2.Household freezers
3.Room air conditioners
4.Water Coolers
5.Drinking fountains - ...ANSWER✓✓✓What are 5 Type I appliances?
1.Walk-in coolers
2.Walk-in freezers
3.Reach-in refrigerators
4.Reach-in freezers
5.Residential & Commercial comfort cooling systems
6.Ice machines - ...ANSWER✓✓✓What are 6 Type II appliances?
1/1,000 - ...ANSWER✓✓✓Micron is _____ of a millimeter of mercury
vacuum
10 - ...ANSWER✓✓✓Typical AC compressors are limited to about
,2|Page
_______ tons of cooling capacity
10 psig - ...ANSWER✓✓✓What is the maximum test pressure to use for
pressurizing Type III centrifugal systems with nitrogen?
10 psig when evacuating the refrigerant from a low pressure chiller
(rupture disc at 15psig) - ...ANSWER✓✓✓A recovery unit's high
pressure cut-out is set for (Psig for Type III):
100 pounds of vapor - ...ANSWER✓✓✓A substantial amount of vapor
will remain in the appliance after all the liquid is removed. An average
350 ton R-11 chiller at 0 psig still contains what amount of vapor?
12 - ...ANSWER✓✓✓Leak Rate refers to the rate at which an appliance
is losing refrigerant, projected over the period of _____ months:
130 degrees F - ...ANSWER✓✓✓When removing oil from a
lowpressure system, a temperature of what must be attained?
130-Degrees F - ...ANSWER✓✓✓What temperature should be attained
when removing oil from a low pressure system to ensure a lower level of
refrigerants in the oil?
,3|Page
15 Lbs of refrigerant or less - ...ANSWER✓✓✓System-Dependent
devices may only be used on appliances containing how much
refrigerant?
15 PSIG - ...ANSWER✓✓✓The typical design burst pressure for a
rupture disc is what?
15% - ...ANSWER✓✓✓All cooling systems containing more than 50
lbs. of refrigerant must be repaired when the annual leak rate
exceeds___?
15% - ...ANSWER✓✓✓Comfort cooling appliances containing more
than 50 lbs of refrigerant must be repaired when the annual leak rate
exceeds _____%
16.9" hg. vacuum or 36 degrees F. - ...ANSWER✓✓✓Before charging
with liquid, how much pressure does an R-11 refrigeration system
require (vapor pressure), and how much saturation temperature?
2020 - ...ANSWER✓✓✓HFC's will be Phased out by?
, 4|Page
25mm - ...ANSWER✓✓✓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:
3 - ...ANSWER✓✓✓Every ______ months or as required by the
manufacturer of your unit, check the recovery or recycling unit for leaks.
30-? - ...ANSWER✓✓✓Mesosphere is?
35% - ...ANSWER✓✓✓All refrigeration systems containing more than
50 lbs. of refrigerant must be repaired when the annual leak rate
exceeds___?
35% - ...ANSWER✓✓✓Commercial and Industrial process refrigeration
containing ore than 50 lbs of refrigerant must be repaired when the
annual leak rate exceeds _____%
35% - ...ANSWER✓✓✓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 ______%
