EPA 608 Core Refrigerant Handling Quiz

What is the purpose of using bubble and dew points in a pressure-temperature chart?

• To indicate the condensing and evaporation temperatures

• To indicate the boiling and freezing points

• To indicate the melting and sublimation temperatures

• To indicate the saturation and superheat temperatures

When is the bubble point used for charging refrigerant?

• When charging by condenser subcooling

• When charging by suction or evaporator superheat

• When charging by liquid injection

• When charging by flash gas bypass

Which charging method is recommended for R-400 series blended refrigerants?

• Weighing the refrigerant into the high side as a liquid

• Throttling liquid refrigerant into the low side with the system operating

• Adding refrigerant as a gas through the suction line

• Adding refrigerant as a gas through the liquid line

What is the concern with using blended refrigerants in systems that develop a leak?

• Fractionization of the refrigerant due to different vapor pressures

• Increased flammability of the refrigerant

• Decreased efficiency of the system

• Corrosion of the system components

Which refrigerant is known to have a high temperature glide and may easily experience fractionation?

• R-407C

• R-134a

• R-410A

• R-22

What type of equipment must be used to handle refrigerants with flammability?

• Equipment designed specifically for handling flammable refrigerants

• Standard HVACR equipment

• Equipment with enhanced safety features

• Equipment with higher pressure ratings

Which refrigerants are being phased out in the U.S. to protect the ozone layer?

• Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs)

• Hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs)

• Ammonia and carbon dioxide (CO₂)

• All refrigerants except HFCs

What is the purpose of Section 608 certification?

• To allow technicians to purchase or handle regulated refrigerants

• To regulate the maximum amount of refrigerant that can be used in new systems

• To establish laws for refrigerant handling at the state and local level

• To identify refrigerants with lower overall risks to human health and the environment

Who must be Section 608 certified when performing activities that violate the refrigerant circuit?

• Anyone removing refrigerant or replacing a component containing a regulated refrigerant

• Only technicians working with external electric circuits

• Only technicians working with the refrigerant components of an HVACR appliance

• No one is required to be certified for such activities

Under the Clean Air Act, what is the requirement for disposing of appliances with CFCs, HCFCs, HFCs or HFOs?

• Recover all remaining refrigerant, render the cylinder useless, and recycle the metal

• Recover the refrigerant to the approved EPA recovery or evacuation levels

• Ensure that any refrigerant has been removed before disposal

• Record the model and serial number of the appliance