9 Universal Certification and Comprehensive Review Free Online FlashCards

Which equipment categories does Universal certification cover?

Universal certification covers Types I, II, and III: small appliances, high- and very-high-pressure appliances, and low-pressure appliances.

What exams are required for Universal certification?

Pass the Core and all three type-specific exams through an EPA-approved organization. Universal testing must be closed-book and proctored; an open-book Core test does not count.

Which appliances fall under Type I certification?

Type I covers factory-made, charged, hermetically sealed small appliances containing 5 pounds or less of refrigerant.

Which equipment does Type II cover?

Type II covers high- and very-high-pressure appliances, except small appliances and motor-vehicle air conditioners.

Which equipment does Type III cover?

Type III covers low-pressure appliances.

When can attaching gauges require Section 608 certification?

Section 608 certification is generally required for servicing stationary refrigeration or air-conditioning equipment in ways that could release refrigerant, including attaching gauges.

What is the general Section 608 rule on intentional refrigerant venting?

Intentional venting of ozone-depleting refrigerants and most substitutes during service is prohibited, apart from limited regulatory exceptions.

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

Use dry nitrogen with a regulator and suitable pressure-relief protection. Oxygen or compressed air can create fire or explosion hazards when mixed with oil.

What does refrigerant reclamation involve?

Reclaiming processes recovered refrigerant and verifies that it meets the applicable purity standard.

Why must a recovery cylinder not be overfilled?

Leave vapor space because liquid refrigerant expands as it warms; overfilling can create dangerous pressure.

What are the general recovery requirements for small appliances?

Generally, recover 90% if post-November 15, 1993 equipment is used and the compressor works, or 80% if it does not work or the appliance predates that date. Evacuation to 4 inches of mercury vacuum is an alternative.

What happens to refrigerant through the four main cycle components?

The evaporator absorbs heat as refrigerant boils; the compressor raises vapor pressure and temperature; the condenser rejects heat as refrigerant condenses; the metering device lowers pressure before the evaporator.