EPA 608 - Core

A disposable cylinder should be reduced to what pressure before scrapping?

• 0 psig

• 20 psig

• 50 psig

• 80 psig

A major system repair is being performed on an R-22 appliance. What CANNOT be done to recharge the appliance?

• Add R-22 after the repair is completed.

• Retrofit the unit to R-407C.

• Use recovered or recycled R-22 from the same owner.

• Top off the unit with R-410A.

A refillable refrigerant cylinder must not be filled above what percent of its capacity by weight:

• 50%

• 70%

• 80%

• 95%

A refrigerant label is placed on a:

• refrigerant cylinder to be returned for reclaiming.

• truck to identify cylinder hauler.

• cylinder to identify gross weight.

• cylinder to identify pressure.

A refrigerant label to identify the type of refrigerant recovered is placed on recovery cylinders for all of the following reasons, EXCEPT to:

• Avoid accidental mixing of recovered refrigerants.

• Allow the recycler to identify the contents.

• Tell if the cylinder is safe.

• Allow the technician's company to determine the amount of refrigerant recovered for record keeping purposes.

According to the ASHRAE refrigerant safety classification standard, which of the following designations would be the safest?

• A-1

• A-3

• B-1

• B-3

After the phase-out of a refrigerant, where will supplies of that refrigerant for equipment servicing come from?

• Recovery and reclaimed gas

• Solvent conversion

• Foreign manufacturers

• Exemptions granted under the Montreal Protocol

Although the saturation pressure-temperature behavior of two refrigerants might be similar, of all the following characteristics of the refrigerants being compared what must also be considered?

• Latent heat of evaporation

• Cooling effect per volume

• Necessary volumetric displacement of the compressor

• Potential to oxidize copper tubing

An example of a CFC refrigerant is:

• R-134a

• R-123

• R-22

• R-12

Approved refrigerant recovery cylinders can be identified by which color code?

• Gray tops and yellow bodies

• Blue tops and green bodies

• Yellow tops and gray bodies

• Green tops and gray bodies