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FREE AND STUDY GAMES ABOUT EPA 2 EXAM QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation
Question 1: Which refrigerant is a HCFC?
Answer:
R-22 Question 2: For small appliance use, the recovery unit manufactured after November 15, 1993
must be capable of recovering:
Answer:
1) 80% of the refrigerant when the compressor is not operating 2) 90% of the refrigerant when the compressor is operating or achieve a 4" vacuum under ARI
740-1993
Question 3: Exceptions to the required evacuation levels for recovery equipment that require an appliance be evacuated to only 0 PSIG apply
Answer:
are filled with water or substances that would damaged the recovery equipment Question 4: Refrigerant vapor is charged into a low pressure chiller initially to prevent
Answer:
water freeze up caused by system vacuum
Question 5: To prevent freezing of the water coils of a low pressure chiller, it is recommend that:
Answer:
1) when charging, begin with vapor 2) circulate water through the chiller when charging 3) do not charge liquid until saturation temperature is above 32F Question 6: R-123 is classified as a ___ under ASHRAE 34 Standard Safety Group:
Answer:
B1 Question 7: Deep vacuums used for evacuation and dehydration of refrigeration systems are
measured in:
Answer:
microns Question 8: The refrigerant you would expect to find in a split system air conditioner
manufactured before 1995 would be:
Answer:
R-22 Question 9: Under ASHRAE Standard 15, what refrigerant requires equipment room oxygen deprivation sensors?
Answer:
1) R-12
2) R-500
3) R-134a Question 10: The maximum safe fill level of a refrigerant cylinder is _______ % liquid
Answer:
80 Question 11: Recovery time can be shortened by:
Answer:
1) recovering as much liquid as possible in the initial stages 2) using short hoses 3) cooling the recovery tank in ice water
Question 12: The required evacuations level for recovering refrigerant for a low pressure
appliance with a recovery machine manufactured BEFORE November 15, 1993 is:
Answer:
25" Hg Question 13: Before disposing of a small appliance containing CFC-12, it is necessary to:
Answer:
recover the refrigerant Question 14: The required evacuation level for recovering refrigerant from a low pressure
appliance with a recovery machine manufactured AFTER November 15, 1993 is:
Answer:
25" Hg Question 15: A condition of excessive superheat at the evaporator outlet and compressor inlet
of an air conditioning system could be an indication of:
Answer:
low refrigerant charge Question 16: Package terminal heat pumps with less than five (5) pounds of refrigerant must be serviced by technicians with a _____ certification
Answer:
Type I Question 17: Comfort cooling chillers and all other equipment with an annual leak rate of ____% requires repair under EPA regulations.
Answer:
15
Question 18: One time (disposable) refrigerant cylinders are used for
Answer:
virgin refrigerant
Question 19: It becomes the owners responsibility to maintain records of all refrigerant added to units that contain more than ___ pounds of refrigerant charge
Answer:
50 Question 20: Should the regulations of the Clean Air Act (CAA) change after a technician
becomes certified:
Answer:
it will be the technician's responsibility to comply with any changes in the law Question 21: A low pressure chiller that provides comfort cooling that an annual leak rate of ___% of the total charge, must be repaired
Answer:
15
Question 22: HFC-134a is a drop-in replacement for
Answer:
HFC-134a is not a drop-in refrigerant
Question 23: Containers of HFC-134a are colored
Answer:
light blue Question 24: R-134a is a drop-in replacement for:
Answer:
it is not a drop-in replacement (R-12,R-11,R-22)
Question 25: The purge unit usually draws from the
Answer:
top of the condenser Question 26: The short term replacement for R-11 refrigerant in chillers is:
Answer:
R-123
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