#5 EPA 608 Type III

A chiller with a charge of 200 pounds has passed the initial verification leak test. When must a follow ­up verification test be conducted?

• The same day.

• The next day.

• Within 10 days.

• Within 30 days.

What evacuation level must technicians recover refrigerant to before disposing a low-pressure appliance?

• 0 psig

• 15 inches of Hg vacuum

• 25 inches of Hg vacuum

• 25 mm of Hg absolute

A rupture disc on a recovery vessel for low-pressure refrigerants relieves at;

• 5 psig.

• 10 psig.

• 15 psig.

• 20 psig.

On low-pressure chillers, moisture most frequently enters the refrigerant system through;

• air leaks in the rupture disc assembly.

• tube leaks in the evaporator.

• leaks from areas with gaskets or fittings.

• leaks from the charging service valve.

How long must owners and operators of low-pressure chillers using HCFC refrigerant keep records of leak inspections, initial verification, and follow-up verification tests?

• 2 years

• 3 years

• 5 years

• Life of the appliance

Starting in 2019, what is the leak rate threshold for comfort cooling appliances with a full charge of 50 or more pounds?

• 5%

• 10%

• 20%

• 30%

Where is the lowest access point on a low-pressure centrifugal air-conditioning appliance?

• Evaporator charging valve.

• Condenser service valve.

• Compressor cooler jacket.

• Purge unit exhaust port.

Under what code group of Standard 34 does R-123 fall?

• A1

• A2

• B1

• B2

What is the typical design burst pressure for a rupture disk on a low-pressure centrifugal air-conditioning system?

• 5 psig

• 10 psig

• 15 psig

• 20 psig

Charging liquid R-245fa into a low-pressure refrigeration system under a vacuum greater than 18 inches Hg vacuum can cause the;

• liquid to absorb excess moisture.

• purge unit to operate.

• system water to freeze.

• system water to boil.