#4 EPA 608 Type I

A passive system-dependent recovery process for small appliances;

• still uses a pump to recover refrigerant.

• must use a pressure relief device when recovering refrigerant.

• captures refrigerant in a non-pressurized container.

• can only be performed on a system with an operating compressor.

Before beginning a refrigerant recovery procedure, it is ALWAYS necessary to;

• allow the appliance to stabilize at room temperature.

• know the type of refrigerant that is in the system.

• remove the appliance to an outdoor location.

• disconnect the appliance from its power source.

Equipment which is used to recover CFC, HCFC, and HFC refrigerant from small appliances for the purpose of disposal must meet what standard?

• Recover 95% or the refrigerant whether or not the compressor is operative.

• Recover 80% of the refrigerant with an inoperative compressor and 90% of the refrigerant with an operative compressor.

• Recover 90% of the refrigerant with an inoperative compressor and 80% of the refrigerant with an operative compressor.

• Recover 75% of the refrigerant within 5 minutes.

How many access valves are needed to recover the refrigerant on a sealed system with an operating compressor that has a completely restricted capillary tube?

• Two valves, one on the high and one on the low side of the system.

• Only one access valve, on the low side of the system.

• Only one access valve, on the high side of the system.

• Two valves, one at the inlet to the compressor and one at the outlet of the condenser coil.

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 tracking process.

It is generally recommended that piercing-type valves be used on which of the following tubing materials?

• Copper and steel

• Aluminum and steel

• Steel and brass

• Copper and aluminum.

Recovery devices for use with small appliances containing CFCs, HCFCs, and HFCs must meet which of the following requirements?

• Recovering 90% of the refrigerant when the compressor is operating or achieving a 4-inch vacuum under the conditions of AHRI 740.

• Recovering 80% of the refrigerant when the compressor is operating.

• Recovering 95% of the refrigerant when the compressor is operating or achieving a 10-inch vacuum under the conditions of AHRI 740.

• Recovering 75% of the refrigerant when the compressor is operating.

The system dependent (passive) recovery process;

• never needs the use of a pump or heat to recover refrigerant.

• must use a pressure relief device to protect the technician and equipment.

• recovers refrigerant in a non-pressurized container.

• can only be performed on a system with an operating compressor.

What can CFC and HCFC refrigerants decompose into at high temperatures (e.g. open flames, glowing metal surfaces, etc.)?

• Boric and chromic acids

• Sulfuric and phosphoric acids

• Hydrochloric and hydrofluoric acids

• Phosphoric and dodecylbenzenesulfonic acid

What gases can CFC and HCFC refrigerants decompose into at high temperatures, (e.g., open flames, glowing metal surfaces, etc.)?

• Hydrazine gas

• Phosgene gas

• Helium gas

• Tetraethyl gas