#4 EPA 608 CORE

Which refrigerant can be purchased by someone who is NOT a Section 608 certified technician?

• Carbon Dioxide refrigerant

• Hydrofluorocarbon refrigerants

• Hydrofluoroolefin refrigerants

• Hydrochlorofluorocarbon refrigerants

For an appliance that uses a CFC, HCFC, or HFC refrigerant, which of the following violates the prohibition on venting?

• Accidental releases associated with timely repair of an appliance.

• Refrigerants emitted when cutting a line without properly evacuating the appliance.

• Refrigerants emitted in a catastrophic failure of an appliance.

• Refrigerants emitted when connecting or disconnecting low loss hoses to charge or service an appliance.

Which of the following refrigerants has the lowest ozone depletion potential?

• R-22

• R-123

• R-410A

• R-502

Distributors must verify which of the following before they can sell HFC or HCFC refrigerant?

• The distributor is a Section 608 certified distributor.

• The distributor is selling Section 608 certified refrigerant.

• The purchaser owns certified recovery and/or recycling equipment.

• The purchaser is or employs a Section 608 certified technician.

Which of the following gases is used as the baseline measurement for global warming potential?

• Ammonia

• Carbon Dioxide

• CFC-12

• Propane

Which of the following refrigerants have an ozone depletion potential of more than zero?

• R-600a and R-441A

• R-134a and R-410A

• R-123 and R-22

• R-290 and R-404A

The term "retrofit" refers to a change to the appliance in order to do what?

• Replace one of the major components.

• Repair it for use with different compressor.

• Convert it to use less energy.

• Convert it to use a different refrigerant.

How does cooling occur in a direct expansion vapor compression refrigeration system?

• When the refrigerant vapor turns to a liquid.

• When the refrigerant is under maximum pressure.

• When the liquid refrigerant is vaporized.

• When the refrigerant gives off heat.

What is one of the most serious results of damage to the stratospheric ozone layer?

• Increased acid rain.

• Increased rates of asthma.

• Increased rates of skin cancer in humans.

• Higher natural background radioactivity.

What should a technician do if they discover that some R-410A was added to an R-22 system?

• Vent the refrigerant since it cannot be reclaimed.

• Recycle the refrigerant.

• Recover the mixture in a separate recovery tank.

• Recover and use in another system.