Type 1-#1

Whenever nitrogen is used to pressurize or blow debris out of the system.

• Only nitrogen vapor should be used

• Only liquid nitrogen should be used

• Either liquid or vapor nitrogen can be used

• Nitrogen can only be used if mixed with R-22

What is the maximum allowable factory charge of refrigerant for Type I appliances using CFCs, HCFCs, or HFCs?

• 3 lbs

• 5 lbs

• 10 lbs

• 15 lbs.

Which of the following are included in EPA’s definition of a “small appliance?”

• Products manufactured full charged and hermetically sealed in a factory.

• Products having 15 lbs or less of refrigerant

• Products with compressors under 1 horsepower

• Fully charged components ready for installation in a split system

When using a self-contained recovery device on a CFC, HCFC, or HFC system with an operating compressor, technicians must:

• Recover the refrigerant to 5 inches of mercury vacuum

• Recover 80% of the nameplate charge

• Recover the refrigerant to both 4 inches of mercury vacuum and 80% of the nameplate charge

• Either recover the refrigerant to 4 inches of mercury vacuum or 90% of the nameplate charge.

Which refrigerants can be mixed in an appliance?

• R-22 and R-407C

• R-12 and R-134a

• R-407C and R-410A

• Refrigerants cannot be mixed.

A passive system-dependent recovery process for small appliances.

• Still uses a pump to recover refrigerant

• Must use pressure relief device when recovering refrigerant

• Captures refrigerant in a non-pressurized container.

• Can only be performed on a system with an operating compressor

What may be done to speed the recovery process and ensure that all CFC, HCFC, or HFC refrigerant has been removed from a frost-free refrigerator?

• Cool the compressor to force liquid out of the high side.

• Heat the recovery cylinder to vaporize liquid refrigerant

• Turn on the defrost heater to increase the refrigerant’s temperature and vaporize any liquid.

• Pack ice around the evaporator to ensure maximum liquid is available.

If a reclamation facility receives a tank of mixed refrigerant, they may:

• Refuse to accept the refrigerant or charge extra for processing it.

• Vent the refrigerant

• Resell the refrigerant for reuse in its current state

• Agree to separate the refrigerants, by the fracking process.

Why should low and high side access valves be installed when recovering refrigerant from a household refrigerator?

• To improve speed of recovery.

• To prevent non-condensables contamination

• To protect the recovery machine

• To prevent oil migration

All appliances must be equipped with a service aperture or process stub which is used when adding or removing refrigerant from the appliance. What is typically used on small appliances?

• A straight piece of tubing that is entered using a piercing access valve.

• A line located 15 inches below the compressor

• A valve installed at the factory which has ¼ diameter and machine threads

• A service aperture or process stub is not present because small appliances are exempt from this requirement.