ACTUAL Exam Questions and CORRECT
Answers
The required level of evacuation for recovery equipment manufactured after
November 15, 1993, on a system containing less than 200 pounds of R-12
refrigerant is:
a. 0 inches Hg
b. 4 inches Hg
c. 10 inches Hg
d. 15 inches Hg - CORRECT ANSWER c. 10 inches Hg
What is the purpose of the filter drier and when should it be changed?
a. To filter the oil. Change every year.
b. To remove moisture from the refrigerant, replace on a routine basis
or anytime a system is opened
c. Cleans the air. Replace monthly
d. Dryer's air filters. Replace yearly - CORRECT ANSWER b. To remove moisture from the
refrigerant, replace on a routine basis or anytime a system is opened
Industrial process and commercial refrigeration equipment with over 50 pounds
of refrigerant with an annual leak rate of ___ % requires repair under EPA
regulations.
a. 0
b. 15
c. 35
d. 50 - CORRECT ANSWER c. 35
, How can you tell through a sight glass if there is excess moisture in the system?
a. You can see moisture bubbles
b. Look for color changes of the refrigerant
c. You can see gas bubbles
d. Site glass is clear - CORRECT ANSWER b. Look for color changes of the refrigerant
Comfort cooling chillers and all other equipment with over 50 pounds of
refrigerant with an annual leak rate of ___ % requires repair under EPA
regulations:
a. 0
b. 15
c. 35
d. 50 - CORRECT ANSWER b. 15
Using large vacuum pumps can lead to freezing of water in the system what are
ways the technician can help prevent the freezing?
a. Increase pressure by introducing nitrogen to counteract freezing
b. Begin charging with vapor until pressure is above freezing
c. a and b
d. None of the above - CORRECT ANSWER c. a and b
The majority of the liquid to be recovered from a system will be found in the:
a. Condenser
b. Receiver (when applied)
c. Low side of the system
d. Evaporator - CORRECT ANSWER b. Receiver (when applied)
Foaming at start-up may be found in what component? What does this mean?