and Answers | A+ Score Assured
Which of the following statement about R-1233zd is FAlSE? - 🧠ANSWER
✔✔It is a SNAP approved replacement
What should we use to remove ice from site or viewing glasses? -
🧠ANSWER ✔✔Isopropyl alcohol
R-123 and a pressure of 18.1 inHg Has a saturation temperature of -
🧠ANSWER ✔✔32 degrees Fahrenheit
,Where does the purge unit on a centrifugal System take it suction -
🧠ANSWER ✔✔Top of the condenser
Where does the refrigerant go after it leaves the purge unit of a low
pressure centrifugal system? - 🧠ANSWER ✔✔To the evaporator
Identify the saturation pressure corresponding 32 degrees Fahrenheit for
R-123 - 🧠ANSWER ✔✔20" inHg
How long must a technician keep records of evacuating/recovering 5-50lbs
of refrigerant - 🧠ANSWER ✔✔3 years
What should you do after reaching the required recovery vacuum on a low-
pressure appliance? - 🧠ANSWER ✔✔Wait for at least a few minutes to see
if the system pressure rises before opening the system
Which of the following always falls under the EPA definition for "major"
maintenance, service or repair? - 🧠ANSWER ✔✔Replacing a compressor
Which of the following statements is true of recycling and recovery
equipment? - 🧠ANSWER ✔✔It must be labeled as certified for EPA's
requirements
, Which of the following message can be used to pressurized an R-1233zd
Systems for the purpose of opening the system for a non-major repair? -
🧠ANSWER ✔✔Warming the liquid refrigerant in the system
Winch and an appliance NOT be evacuated all the way to the prescribed
level? - 🧠ANSWER ✔✔When therepair is followed by evacuation of the
appliance to the environment
To prevent freezing when recharging and evacuated water-cooled chiller
system with R-123, at what pressure can liquid charging first begin? -
🧠ANSWER ✔✔20 Psi's
Refrigerant removal from my low- pressure system starts with: - 🧠ANSWER
✔✔Liquid removal
When evacuating a system, the use of a severely oversized vacuum pump
could: - 🧠ANSWER ✔✔Caused the trapped water to freeze
What is the typical advantage of a water cooled recovery unit? - 🧠ANSWER
✔✔Fast recovery of large quantities of refrigerant
Why must water be circulated through a chiller during refrigerant
evacuation? - 🧠ANSWER ✔✔To prevent freezing of water in the appliance
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