A technician runs out of room in the recovery cylinder partway through a job and notices an empty disposable refrigerant jug on the truck. Why can that jug not be used to hold the rest of the recovered charge?
Correct Answer
C) One-time-use cylinders are not built or approved for refilling, and recovered refrigerant belongs in an approved refillable recovery cylinder
A disposable cylinder is built for a single trip from the factory to the job. It is not designed for repeated pressurization, it is not subject to the periodic requalification that refillable cylinders undergo, and refilling it is prohibited. Recovered refrigerant goes into a cylinder approved and marked for recovery service, which is built for repeated use and carries a requalification date. Empty disposable cylinders should be depressurized properly and disposed of according to local practice, never refilled and never used for storage.
Why This Is the Correct Answer
Refillable recovery cylinders are designed, marked and periodically requalified for repeated service. Disposable cylinders are none of those things, and refilling one puts a vessel of unknown condition and unverified history under pressure on a truck.
Why the Other Options Are Wrong
Option A: Disposable jugs are too small to hold what remains of the charge once a commercial system of this size is pulled down
Size is not the objection. Disposable cylinders come in capacities comparable to the smaller recovery cylinders, and the prohibition on refilling one would apply just the same if it held the whole charge.
Option B: Disposable jugs are made of a steel that reacts chemically with recovered refrigerant once it has picked up oil and acid from the system it came out of
There is no chemical incompatibility between the steel and the refrigerant, its oil or its acid. What rules the jug out is its mechanical and regulatory status as a single-trip vessel, not what it is made of.
Option D: Disposable jugs are manufactured without any pressure relief device at all, so a warm cylinder has no way to vent
Disposable cylinders do carry relief provisions. Their limitation is that they are not built, marked, or periodically requalified for refilling, which is what an approved recovery cylinder must be.
Memory Technique
One-time use means one time. Yellow-topped recovery cylinder for anything coming out of a system.
Reference Hint
Recovery cylinders must be DOT approved for refillable service and periodically requalified; disposable cylinders may not be refilled.
More epa-608-type-2 Questions
A walk-in cooler condensing unit holds a full charge of twenty-five pounds of R-404A, which is below the fifty pound threshold that brings an appliance under the leak repair provisions. What still applies to this unit?
An office building has thirty water source heat pumps on a common water loop, and each one left the factory assembled, hermetically sealed and charged with four pounds of R-410A. How is one of those units classified?
A data sheet for an unfamiliar refrigerant lists a boiling point of about fifty-five degrees Fahrenheit at atmospheric pressure. What does that tell a technician holding Core and Type II certification?
A technician holds Core, Type I and Type III certification and is sent to recover the charge from a twenty ton rooftop unit charged with R-410A. What does that combination of sections allow on this job?
A fleet garage technician holds only the vehicle air conditioning certification issued under Section 609 and is asked to recover the charge from the shop's own rooftop air conditioner. What does that credential allow?
A split system's outdoor unit, indoor coil and the line set the installer ran and brazed between them are being considered. For the purposes of the refrigerant rules, what makes up the appliance here?
On a new installation the line set is brazed to a factory charged outdoor unit and an indoor coil shipped under a nitrogen holding charge, with the outdoor unit's service valves still closed. What does the recovery requirement call for before that brazing?
A rooftop unit's data plate has weathered until the charge figure cannot be read, and the technician needs the full charge to place the appliance under the evacuation and leak provisions. Where should that figure come from?
A computer room air conditioning unit holds forty pounds of R-407C and connects to a remote air cooled condenser through refrigerant piping run and brazed by the installer. How is that unit classified?
A shop's office manager, who holds no technician certification, is sent to a supply house to pick up a new recovery machine for the commercial crew. What does the sales restriction require at that counter?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass
Related Study Resources
Previous Question
A small leak is suspected somewhere inside an evaporator coil, in tubing buried among the fins and the rows of the bundle. What makes that kind of leak so hard to pin down?
Next Question
Rather than one very long single pull, a technician evacuates a contaminated system three times and breaks the vacuum with dry nitrogen between the pulls. Why does that approach clean the system more thoroughly?