#2 EPA 608 Type II

A chiller for comfort cooling that contains 50 pounds or more of R-123 is leaking. Starting in 2019, at what leak rate does the EPA require that the equipment be repaired?

• 5%

• 10%

• 15%

• 20%

A cold storage warehouse chooses not to repair an appliance containing R-22 that is leaking above the threshold rate. How long can the facility continue to operate that appliance before it must be retrofitted or retired, assuming no extensions apply?

• 1 month

• 9 month

• 12 month

• 24 month

A company uses a chiller that diverts 55% of its cooling capacity to one of its manufacturing lines and 45% of its cooling capacity to air condition the office spaces. Which leak rate category would this chiller be in?

• Industrial process refrigeration

• Ice making refrigeration

• Commercial refrigeration

• Comfort cooling

A customer has an industrial process refrigeration system that contains 1000 lbs. of R-22 that has exceeded the applicable leak rate threshold. How often is the customer required to perform a leak inspection?

• Every month

• Every 3 month

• Every 6 month

• Every 12 month

How can you speed up the removal of the refrigerant charge from a system?

• Using a smaller recovery vessel.

• Cooling the recovery cylinder to lower its pressure.

• Using a two-stage vacuum pump.

• Heating the recovery cylinder to raise its pressure.

It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. However, it;

• often contains moisture.

• requires a minimum of 10 psig.

• is toxic when released into the atmosphere.

• requires a pressure regulator.

Recovered refrigerant may contain which of the following impurities?

• Ammonia, carbon dioxide, and methyl chloride

• Sodium chloride, potassium nitrate, and silicone oil

• Sulphur dioxide and methane

• Acids, moisture, and oil

Refrigerant cannot be recovered without isolating a parallel compressor system because of;

• the service valve connection.

• the electrical connections.

• an open equalization connection.

• the thermal bleed connection.

To avoid freezing the water contained in a water-cooled heat exchanger of an R-134a refrigeration system during charging, the system should be initially charged with R-134a vapor to a pressure of approximately;

• 0 psig.

• 10 psig.

• 30 psig.

• 90 psig.

What action must an owner/operator take if a supermarket system containing 50 or more pounds of R­22 leaks more than 125% of its full charge in a calendar year?

• Retrofit the appliance with a substitute refrigerant.

• Recover the refrigerant and leak check the appliance with a trace gas.

• Retire the appliance until it can be replaced with a new one.

• Submit a report to EPA describing efforts to identify leaks and repair the appliance.