EPA 608 Practice Worksheets & Answer Key

Answer: Type I

1. The relevant stated condition is: A technician will service a factory-sealed household freezer containing 4 lb of refrigerant.
2. Apply the relevant source rule. Classify the appliance before selecting a certification. Type I, II and III have different equipment scopes.
3. This supports “Type I”. The alternative “Type II” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.

Answer: The five-pounds-or-fewer side

1. The relevant stated condition is: A factory-sealed household refrigerator contains exactly 5 lb.
2. Apply the relevant source rule. A small appliance is fully manufactured, charged and hermetically sealed in a factory with five pounds or less of refrigerant. Both the construction definition and charge condition matter; small-looking equipment alone does not qualify.
3. This supports “The five-pounds-or-fewer side”. The alternative “The greater-than-five side” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.

Answer: 4 inches Hg vacuum

1. The relevant stated condition is: A 100 lb medium-pressure appliance is serviced with pre-November-15-1993 recovery equipment.
2. Apply the relevant source rule. This is medium-pressure equipment with a full charge below 200 lb. The pre-November-15-1993 recovery-equipment column gives 4 inches Hg vacuum; 10 would use the later-equipment column.
3. This supports “4 inches Hg vacuum”. The alternative “0 inches Hg vacuum” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.

Answer: Absolute pressure is not the same reference as gauge vacuum

1. The relevant stated condition is: A service note omits the word absolute from a 25 mm Hg target.
2. Apply the relevant source rule. EPA lists 25 mm Hg absolute for the general low-pressure appliance evacuation target, in both recovery-equipment date columns.
3. This supports “Absolute pressure is not the same reference as gauge vacuum”. The alternative “All pressure references are identical” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.

Answer: Certified reclamation before the ownership transfer for reuse

1. The relevant stated condition is: Used refrigerant moves fromCustomer A's appliance toCustomer B's appliance after onlyfield recycling.
2. Apply the relevant source rule. The customer changes from one appliance owner to another. Field recycling does not meet the certified-reclamation requirement for that ownership transfer.
3. This supports “Certified reclamation before the ownership transfer for reuse”. The alternative “Only further field recycling by the same contractor” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.

Answer: 2.4 lb

1. The relevant stated condition is: A qualifying small appliance initially contains 3 lb.
2. Apply the relevant source rule. The applicable recovery fraction is 80%; multiply 3 lb by 80/100. This is a rule-based learning calculation, not a field recovery procedure.
3. This supports “2.4 lb”. The alternative “0.6 lb” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.

Answer: 30%

1. The relevant stated condition is: An appliance normally contains 100 lb of ozone-depleting refrigerant and is used for industrial process refrigeration.
2. Apply the relevant source rule. The stated ODS appliance contains 100 lb, so it meets the 50 lb size condition. The use is industrial process refrigeration; EPA identifies 30 percent as the applicable annual trigger for that category. The other percentages belong to different category assumptions.
3. This supports “30%”. The alternative “5%” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.

Answer: It addresses the specified pressure condition without replacing the other prerequisites

1. The relevant stated condition is: A chiller is brought to 0 psig for a qualifying non-major repair.
2. Apply the relevant source rule. For the limited non-major low-pressure repair exception not followed by evacuation to the environment, pressurize to 0 psig before opening; prohibited subsequent-purge methods are not generally allowed.
3. This supports “It addresses the specified pressure condition without replacing the other prerequisites”. The alternative “It authorizes uncontrolled refrigerant release” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.