EPA 608 Practice exam Type 3
questions well answered graded A+
10 psig - correct answer ✔✔The maximum test pressure for leak testing a low-pressure
centrifugal chiller is
The system has a leak on the sub-ambient pressure side of the system - correct answer
✔✔Excessive operation of a purge system means
20% - correct answer ✔✔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.
10% - correct answer ✔✔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.
100 pounds of refrigerant in the system - correct answer ✔✔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
10 psig - correct answer ✔✔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).
15 psig - correct answer ✔✔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.
, Should be increased to speed recovery - correct answer ✔✔If possible, the temperature of the
equipment room where the chiller is located
Less refrigerant will be soluble and/or trapped in the oil at higher temperatures - correct answer
✔✔When possible, oil in the chiller should be heated because
20 in Hg vacuum - correct answer ✔✔To prevent freezing, when recharging an evacuated water
cooled chiller system with R-123, first charge with a vapor 20 pressure of at least
Freezing of the water in the chiller barrels - correct answer ✔✔When recharging a chiller,
refrigerant is first added as a vapor followed by a liquid refrigerant to avoid
1.)An evaporator 2.) condenser 3.)compressor - correct answer ✔✔Replacing _________ is
always considered a "major maintenance, service, or repair"?
25 mm of Hg absolute - correct answer ✔✔Low pressure systems must be evacuated to
_________ before being discarded.
Labeled as certified to meet EPA's requirements - correct answer ✔✔Every recovery and
recycling unit must be
3 years - correct answer ✔✔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
Wait a few minutes to see if the system pressure rises before opening the system up for repairs -
correct answer ✔✔After reaching the required recovery vacuum,
When leaks in the appliance make evacuation to the prescribe level unattainable - correct
answer ✔✔When does the EPA allow you to not evacuate to the prescribed level?
questions well answered graded A+
10 psig - correct answer ✔✔The maximum test pressure for leak testing a low-pressure
centrifugal chiller is
The system has a leak on the sub-ambient pressure side of the system - correct answer
✔✔Excessive operation of a purge system means
20% - correct answer ✔✔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.
10% - correct answer ✔✔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.
100 pounds of refrigerant in the system - correct answer ✔✔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
10 psig - correct answer ✔✔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).
15 psig - correct answer ✔✔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.
, Should be increased to speed recovery - correct answer ✔✔If possible, the temperature of the
equipment room where the chiller is located
Less refrigerant will be soluble and/or trapped in the oil at higher temperatures - correct answer
✔✔When possible, oil in the chiller should be heated because
20 in Hg vacuum - correct answer ✔✔To prevent freezing, when recharging an evacuated water
cooled chiller system with R-123, first charge with a vapor 20 pressure of at least
Freezing of the water in the chiller barrels - correct answer ✔✔When recharging a chiller,
refrigerant is first added as a vapor followed by a liquid refrigerant to avoid
1.)An evaporator 2.) condenser 3.)compressor - correct answer ✔✔Replacing _________ is
always considered a "major maintenance, service, or repair"?
25 mm of Hg absolute - correct answer ✔✔Low pressure systems must be evacuated to
_________ before being discarded.
Labeled as certified to meet EPA's requirements - correct answer ✔✔Every recovery and
recycling unit must be
3 years - correct answer ✔✔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
Wait a few minutes to see if the system pressure rises before opening the system up for repairs -
correct answer ✔✔After reaching the required recovery vacuum,
When leaks in the appliance make evacuation to the prescribe level unattainable - correct
answer ✔✔When does the EPA allow you to not evacuate to the prescribed level?
