EPA 608 Review -- TYPE 3 (English)

What is the definition of a low-pressure appliance according to the EPA certification exam?

• An appliance using a refrigerant with a liquid phase saturation pressure below 45 psia at 104 °F

• An appliance using a refrigerant with a liquid phase saturation pressure above 45 psia at 104 °F

• An appliance using a refrigerant with a liquid phase saturation pressure below 30 psia at 104 °F

• An appliance using a refrigerant with a liquid phase saturation pressure above 30 psia at 104 °F

Which of the following refrigerants is NOT considered low-pressure?

• R-11

• R-123

• R-22

• R-113

What is required to work on chiller systems that do not use low-pressure refrigerants?

• Type I certification

• Type II certification

• Type III certification

• No certification

Why are water lines preferred over air ducts in larger buildings for chiller systems?

• Water lines are more expensive to install

• Water lines are smaller and less expensive to install

• Air ducts provide better cooling

• Air ducts are easier to maintain

What is one method by which a chiller rejects heat to the exterior ambient air?

• Direct air cooling

• Water-to-air chiller

• Air-to-water chiller

• Direct water cooling

What is the primary advantage of using a water-to-water chiller system?

• Lower initial cost

• Simplicity of design

• Use of water in the cooling tower to lower heat rejection temperature

• Higher maintenance costs

Which refrigerants are currently used in most commercial water-to-water chiller systems?

• R-11

• R-123

• R-22

• R-134a

What is the function of the cooling tower in a water-to-water chiller system?

• To increase the temperature of the refrigerant

• To reject heat to the air

• To compress the refrigerant

• To evaporate the refrigerant

Where is the condenser located in a water-cooled chiller system?

• Inside the mechanical room

• Just above the evaporator barrel

• Outside the building

• Below the compressor

What is the typical range of commercial water chiller capacities mentioned in the document?

• 1-ton to 5-ton

• 5-ton to 1,000-ton

• 10-ton to 500-ton

• 500-ton to 2,000-ton