Type III EPA 608 – 50 Multiple Choice Questions

What type of equipment is Type III certification intended for?

• High-pressure appliances

• Low-pressure appliances

• Small appliances

• Motor vehicle air conditioners

Which refrigerants are typically used in low-pressure appliances?

• R-22, R-410A

• R-134a, R-404A

• R-11, R-123

• R-32, R-407C

At what vacuum level must you recover refrigerant from a low-pressure appliance (with 200 lbs or more refrigerant) using recovery equipment manufactured after November 15, 1993?

• 0 inches Hg

• 10 inches Hg

• 15 inches Hg

• 25 inches Hg

What is the typical high-pressure side of a low-pressure chiller under normal operation?

• Greater than 150 psig

• 30 psig

• Vacuum

• Slight positive pressure

What is the proper method to recover refrigerant from a low-pressure system?

• Recover vapor only

• Recover liquid only

• Recover liquid first, then vapor

• Use venting

What temperature should be achieved to increase refrigerant removal efficiency from a chiller?

• 0°F

• Room temperature

• 130°F

• 212°F

Why is it important to heat the oil in a chiller during recovery?

Which device prevents refrigerant from flowing back into the system during recovery?

• Pressure relief valve

• Schrader valve

• Check valve

• Expansion valve

Which component should be monitored when heating a chiller to speed up recovery?

• Discharge temperature

• Water temperature

• Pressure-relief valve

• Oil temperature

Before recovering refrigerant, what should be done to isolate the system?

• Open all valves

• Pump down the system

• Close the service valves

• Close the purge unit