#3 EPA 608 Type III

Who is responsible for keeping records of all leak inspections and any completed leak repair verification tests?

• The original installing technician's employers

• Only the technician that has actually performed each inspection or verification test

• The owner and/or operator of the equipment

• The EPA leak rate assessment division

What steps may be taken to prevent air accumulation into an idle low-pressure refrigeration system?

• Leave the purge unit on-line at all times.

• Maintain system pressure slightly above atmospheric pressure.

• Open the air vents on the condenser.

• Intermittently operate the system with no load.

Generally, chillers belong to which EPA leak repair category?

• Commercial refrigeration

• Industrial process refrigeration

• Comfort cooling

• Ice making refrigeration

A chiller containing 150 pounds of HCFC refrigerant is leaking above the leak rate threshold. Unless granted additional time, what must be completed within 30 days?

• Repair the appliance so that it leaks below the threshold and conduct the initial verification test

• Retrofit the appliance to a different natural refrigerant approved by ASHRAE.

• Document that all OEM replacement parts have been ordered.

• Notify the EPA of the leak rate and the time required to complete the repair.

Where does the purge unit on a centrifugal system take its suction?

• Top of the condenser

• Compressor oil sump

• Top of the evaporator

• Suction elbow

1. What must be done after recovering the liquid refrigerant from a low-pressure chiller?

• Recover the vapor refrigerant.

• Pressurize the system with nitrogen.

• Separate the oil from the system.

• Solvent flush the entire system.

What should be done to reduce refrigerant loss from a purge unit on a R-123 chiller?

• Leak test and repair the chiller.

• Seal the purge unit discharge line.

• Pipe purge unit back into the low side.

• Pipe purge unit back into recovery unit.

How long must a technician evacuating refrigerant from appliances with a full charge of more than 5 pounds and less than 50 pounds that are being disposed of keep records of the event?

• 1 year

• 3 years

• 5 years

• 10 years

Why should the oil be removed from a low-pressure system at 130°F?

• 130°F is the normal operating temperature for oil in a low-pressure system.

• Less refrigerant will be contained in the oil at the higher temperature.

• Warmer oil has a lower viscosity and flows more easily.

• It shows that the heater is working.

Which of the following indicates air in a low-pressure system?

• High head pressure.

• High liquid level.

• Low head pressure.

• Low suction pressure.