6 Integrated Practice and Competency Checks Free Online FlashCards

When is EPA Section 608 certification generally needed?

Technicians who may violate the integrity of a refrigerant circuit generally need EPA Section 608 certification.

What must happen before opening an appliance with more than 5 pounds of refrigerant?

For appliances with more than 5 pounds of refrigerant, recover to the applicable EPA evacuation level before opening the appliance or isolated section.

How should technicians prevent refrigerant mixing during recovery?

Use recovery equipment suitable for the refrigerant and appliance, along with a compatible recovery cylinder. Do not mix refrigerants.

What evacuation target does the table list for high-pressure equipment charged with less than 200 pounds?

The table lists 0 inches Hg vacuum for high-pressure appliances or isolated components charged with less than 200 pounds, regardless of whether they were made before or after November 15, 1993.

What evacuation target does the table list for very-high-pressure appliances?

The table lists 0 inches Hg vacuum for very-high-pressure appliances.

What limits apply when a leak prevents the normal evacuation level?

Where possible, isolate leaking from non-leaking components. Evacuate non-leaking sections to their applicable level; the leaking section must reach the lowest achievable level without remaining above 0 psig.

Which gases must not be used to pressure-test a refrigeration circuit?

Do not use oxygen or compressed air to pressure-test a refrigeration circuit. Use regulated dry nitrogen only when the approved procedure permits it.

When is recovered refrigerant generally subject to reclamation before reuse?

Recovered refrigerant may generally be returned to the same appliance or another appliance owned by the same person. If ownership changes, an EPA-certified reclaimer is generally required.

What pressure restriction applies when changing oil that may contain refrigerant?

EPA prohibits changing oil above 5 psig, so refrigerant contained in the oil must be considered.

Which appliances may be covered by Section 608 leak-repair requirements?

Section 608 leak-repair requirements apply to appliances with a full charge of 50 pounds or more of an ozone-depleting refrigerant when the applicable leak-rate trigger is exceeded.

What leak-rate triggers are listed for Section 608 appliances?

The triggers are 30% for industrial process refrigeration, 20% for commercial refrigeration, and 10% for comfort cooling and other appliances.

What is the general AIM Act ER&R leak-repair deadline?

The general repair deadline is 30 days from the relevant refrigerant addition, or 120 days when an industrial process shutdown is required. Verification, inspections, records, and exceptions also apply.