EPA 608 Practice exam Type 3 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
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
Replacement of __________ is always considered "major" under EPA's regulations. -
CORRECT ANSWER 1.) A condenser 2.) A compressor 3.) An evaporator
ACTUAL Exam Questions and CORRECT
Answers
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
Replacement of __________ is always considered "major" under EPA's regulations. -
CORRECT ANSWER 1.) A condenser 2.) A compressor 3.) An evaporator
