5 Universal Certification Practice and Review Free Online FlashCards

Which equipment categories does Universal certification cover?

Universal certification covers Core and all three equipment types: Type I, Type II, and Type III. The Core exam must be proctored.

What is the environmental distinction between HFCs and ozone-depleting refrigerants?

HFCs have zero ozone-depletion potential because they contain no chlorine, but some have high global-warming potential.

What is Section 608's general rule on intentionally venting refrigerants?

Section 608 generally prohibits intentionally venting refrigerants during service, repair, or disposal, with limited exceptions.

What does recovering refrigerant mean?

Recovering means removing refrigerant from equipment and storing it without necessarily processing it.

What must generally happen before recovered refrigerant is transferred to a different owner?

Recovered refrigerant transferred to a different owner generally must be reclaimed by an EPA-certified reclaimer.

What gas should be used to pressure-test a refrigeration system?

Use regulated nitrogen with appropriate protective equipment and pressure-relief protection. Never pressure-test with oxygen or compressed air.

Why must a repaired system be evacuated before charging?

Evacuate a repaired system before charging to remove air and moisture.

What recovery level applies to a functional small-appliance compressor with post-1993 recovery equipment?

The minimum recovery level is $90\%$, or the appliance may be evacuated to $4$ inches of mercury vacuum.

Can system-dependent recovery equipment be used on a system with more than $15$ pounds of refrigerant?

No. System-dependent recovery equipment may not be used on a system containing more than $15$ pounds of refrigerant.

What evacuation level applies to a low-pressure appliance?

The evacuation level is $25\ \text{mm Hg}$ absolute, regardless of whether the appliance predates or postdates November 15, 1993.

What is the maximum system pressure before removing oil from a stationary refrigeration appliance?

Reduce system pressure to no greater than $5\ \text{psig}$ before removing oil, or drain the oil into a receiver that is then brought to that pressure.

What does recycling refrigerant mean?

Recycling cleans refrigerant for reuse, generally in equipment owned by the same person.