A process cooling system charged with R-22 lists a normal charge of exactly two hundred pounds, and the recovery machine is a current model. Which row of the evacuation table covers an appliance sitting precisely on the boundary?
Correct Answer
D) The row for appliances holding two hundred pounds or more
The table describes one row as less than two hundred pounds and the other as two hundred pounds or more, so a charge of exactly two hundred pounds falls in the second. With a current recovery machine on an R-22 appliance, that means ten inches of mercury vacuum rather than the atmospheric-pressure entry the smaller row allows. Boundary charges are worth reading carefully, because the wording of the two rows is what settles them rather than any rounding convention.
Why This Is the Correct Answer
The two rows are written as less than two hundred pounds and as two hundred pounds or more, which leaves no gap and no overlap. An appliance at exactly two hundred pounds is captured by the second wording, so it takes the deeper requirement. With modern recovery equipment on an R-22 system, that is ten inches of mercury vacuum before the circuit may be opened.
Why the Other Options Are Wrong
Option A: The row for appliances holding less than two hundred pounds
The smaller row is written as less than two hundred pounds, which excludes a charge of exactly two hundred. This is the reading that costs candidates the question.
Option B: The row that applies to very high-pressure appliances only
Very high-pressure is a refrigerant classification, not a charge size. An R-22 appliance never lands on that row no matter how much it holds.
Option C: Neither row, because a boundary charge has no listed requirement
The two rows are written to leave no gap, so every charge falls in one of them. There is no unregulated boundary case.
Memory Technique
Or more means the number itself is included. Two hundred on the nose is a big appliance.
Reference Hint
The evacuation table rows read less than two hundred pounds and two hundred pounds or more; exactly two hundred takes the second.
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?
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