A technician holds Type II certification only. Which assignment may that technician legally carry out without earning another certification?
Correct Answer
B) Recovering the charge from a five hundred ton R-134a screw chiller
Type II certification authorizes work on high-pressure appliances. An R-134a screw chiller is a high-pressure appliance regardless of its tonnage, so recovering its charge falls squarely inside Type II authority. The other three assignments all involve machines charged with the low-pressure family, R-11, R-123 and R-113, and any maintenance, service or repair that could release those charges requires Type III certification. Machine size and the specific task do not change which category the appliance sits in.
Why This Is the Correct Answer
The R-134a machine is a high-pressure appliance, and recovery from high-pressure appliances is exactly what Type II covers. Its size is irrelevant to the certification question. The technician stays within scope because the refrigerant, not the tonnage or the compressor style, determines the category.
Why the Other Options Are Wrong
Option A: Adding refrigerant to an R-11 centrifugal chiller that is low on charge
Adding refrigerant to an R-11 machine is service on a low-pressure appliance, which requires Type III. Charging counts as maintenance that could release refrigerant.
Option C: Pumping out an R-123 machine so the tube bundle can be repaired
Pumping out an R-123 machine is recovery from a low-pressure appliance and is Type III work no matter how routine the repair behind it is.
Option D: Running a standing vacuum test on an R-113 machine after its charge was removed
A standing vacuum test on an R-113 machine is service on a low-pressure appliance, so it also falls under Type III authority.
Memory Technique
Read right to left: refrigerant first, task second. R-11, R-113, R-123 all shout Type III.
Reference Hint
Type II authorizes high-pressure appliance work; any service on R-11, R-113 or R-123 machines requires Type III.
More epa-608-type-3 Questions
Some jobs on a chiller count as a major repair under the refrigerant rules, which changes what a technician is allowed to do with a badly leaking machine. Which job falls into that category?
An owner asks how many pounds of refrigerant the rules allow to be left inside a chiller once the recovery has been signed off. What is the correct answer to give him?
The motor of a hermetic centrifugal chiller sits inside the pressure boundary rather than outside it on a shaft. What follows from that construction?
An oxygen monitor is used to decide whether a chiller machine room is safe to enter after a refrigerant release. Below what oxygen reading is the atmosphere treated as oxygen deficient?
A low-pressure chiller's rupture disc has a discharge line running from it. Where does that line have to terminate?
A refrigerant vapor detector in a chiller machine room reaches its alarm level. Besides sounding, what is that alarm expected to do?
Which piece of equipment requires a technician to hold Type III certification before it may be serviced?
What property of the refrigerant is what actually places an appliance into the low-pressure category?
During normal operation, what condition exists inside the evaporator of a running low-pressure centrifugal chiller?
In what unit is the required final recovery vacuum for a low-pressure appliance normally expressed?
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