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EPA 608 PRACTICE FINAL EXAM QUESTIONS WITH COMPLETE ANSWERS
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EPA 608 PRACTICE FINAL EXAM QUESTIONS WITH COMPLETE ANSWERS
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EPA 608 PRACTICE FINAL EXAMQUESTIONS WITH COMPLETE
ANSWERS
The maximum test pressure for leak testing a low-pressure centrifugal chiller is -
Answer-10 psig
Excessive operation of a purge system means - 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.
- 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.
- 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 -
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). - 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. - Answer-15 psig
If possible, the temperature of the equipment room where the chiller is located -
Answer-Should be increased to speed recovery
When possible, oil in the chiller should be heated because - 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 - Answer-20 in Hg vacuum
When recharging a chiller, refrigerant is first added as a vapor followed by a liquid
refrigerant to avoid - Answer-Freezing of the water in the chiller barrels
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