EPA 608 Practice exam Type 3 questions and answers A+
Grade 2026\2027
The maximum test pressure for leak testing a low-pressure centrifugal chiller is
- correct answer 10 psig
Excessive operation of a purge system means
- correct answer The system has a leak on the sub-ambient pressure side of the system
For a commercial refrigeration system with a charge of 50 pounds or more refrigerant, a substantial (or
threshold) week rate will be reduced to ________ after January 1, 2019.
- correct answer 20%
For a comfort cooling system with a charge of 50 pounds or more of refrigerant, a substantial (or
threshold) Leak rate will be reduced to _________ after January 1, 2019.
- correct answer 10%
According to the EPA, when all the R-123 liquid has been removed from an average 350 ton R-123 chiller
and the system vapor pressure is 0 psig, the system contains
- correct answer 100 pounds of refrigerant in the system
When working with low pressure systems, the high-pressure cut off should be set to no more than
_________ to avoid damaging the system or activating the pressure blow off device (rupture disk).
- correct answer 10 psig
The rupture discs on the low pressure chiller and on the recovery tank should relieve at __________ to
prevent damage to the system during refrigerant transfer into or out of the system.
- correct answer 15 psig
, If possible, the temperature of the equipment room where the chiller is located
- correct answer Should be increased to speed recovery
When possible, oil in the chiller should be heated because
- correct answer Less refrigerant will be soluble and/or trapped in the oil at higher temperatures
To prevent freezing, when recharging an evacuated water cooled chiller system with R-123, first charge
with a vapor 20 pressure of at least
- correct answer 20 in Hg vacuum
When recharging a chiller, refrigerant is first added as a vapor followed by a liquid refrigerant to avoid
- correct answer Freezing of the water in the chiller barrels
Replacing _________ is always considered a "major maintenance, service, or repair"?
- correct answer 1.)An evaporator 2.) condenser 3.)compressor
Low pressure systems must be evacuated to _________ before being discarded.
- correct answer 25 mm of Hg absolute
Every recovery and recycling unit must be
- correct answer Labeled as certified to meet EPA's requirements
When disposing a system with a normal charge of more than 5 pounds and less than 50 pounds, the
disposal record must be kept by the technician for
- correct answer 3 years
After reaching the required recovery vacuum,
- correct answer Wait a few minutes to see if the system pressure rises before opening the system up for
repairs
When does the EPA allow you to not evacuate to the prescribed level?
- correct answer When leaks in the appliance make evacuation to the prescribe level unattainable
Grade 2026\2027
The maximum test pressure for leak testing a low-pressure centrifugal chiller is
- correct answer 10 psig
Excessive operation of a purge system means
- correct answer The system has a leak on the sub-ambient pressure side of the system
For a commercial refrigeration system with a charge of 50 pounds or more refrigerant, a substantial (or
threshold) week rate will be reduced to ________ after January 1, 2019.
- correct answer 20%
For a comfort cooling system with a charge of 50 pounds or more of refrigerant, a substantial (or
threshold) Leak rate will be reduced to _________ after January 1, 2019.
- correct answer 10%
According to the EPA, when all the R-123 liquid has been removed from an average 350 ton R-123 chiller
and the system vapor pressure is 0 psig, the system contains
- correct answer 100 pounds of refrigerant in the system
When working with low pressure systems, the high-pressure cut off should be set to no more than
_________ to avoid damaging the system or activating the pressure blow off device (rupture disk).
- correct answer 10 psig
The rupture discs on the low pressure chiller and on the recovery tank should relieve at __________ to
prevent damage to the system during refrigerant transfer into or out of the system.
- correct answer 15 psig
, If possible, the temperature of the equipment room where the chiller is located
- correct answer Should be increased to speed recovery
When possible, oil in the chiller should be heated because
- correct answer Less refrigerant will be soluble and/or trapped in the oil at higher temperatures
To prevent freezing, when recharging an evacuated water cooled chiller system with R-123, first charge
with a vapor 20 pressure of at least
- correct answer 20 in Hg vacuum
When recharging a chiller, refrigerant is first added as a vapor followed by a liquid refrigerant to avoid
- correct answer Freezing of the water in the chiller barrels
Replacing _________ is always considered a "major maintenance, service, or repair"?
- correct answer 1.)An evaporator 2.) condenser 3.)compressor
Low pressure systems must be evacuated to _________ before being discarded.
- correct answer 25 mm of Hg absolute
Every recovery and recycling unit must be
- correct answer Labeled as certified to meet EPA's requirements
When disposing a system with a normal charge of more than 5 pounds and less than 50 pounds, the
disposal record must be kept by the technician for
- correct answer 3 years
After reaching the required recovery vacuum,
- correct answer Wait a few minutes to see if the system pressure rises before opening the system up for
repairs
When does the EPA allow you to not evacuate to the prescribed level?
- correct answer When leaks in the appliance make evacuation to the prescribe level unattainable
