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Mixed skills
10 original practice questions · Untimed · Follow each question’s response instructions
1. A leak prevents a normal evacuation target without substantial contamination. Which first planning step is appropriate where possible?
epa-608-leaking-recovery-12. An uncertified disposal worker uses recovery equipment. Which requirement still matters despite the activity-specific certification exception?
epa-608-service-disposal-33. Recovered refrigerant from one supermarket rack is proposed for another rack owned by the same company. Which ownership fact supports reuse without mandatory ownership-transfer reclamation?
epa-608-ownership-transfer-14. A whole high-pressure appliance has a full charge of 250 lb. Post-1993 recovery equipment is used. Which table target applies?
epa-608-very-high-and-isolation-35. A customized appliance is directly linked to a chemical manufacturing process. Which use category is described?
epa-608-cold-storage-classification-36. A qualifying small appliance initially contains 3 lb. Recovery equipment was manufactured after November 15, 1993, and the appliance compressor is not functional. Using the percentage method, what minimum mass must be recovered?
epa-608-failed-compressor-37. A low-pressure evacuation worksheet compares 25 mm Hg absolute with 25 inches Hg vacuum as if they were identical. What is the main error?
epa-608-absolute-target-58. Two appliances have similar cabinet sizes but different classifications. Which information should control the recovery-rule selection?
epa-608-charge-boundary-49. A required test evaluates repaired equipment after return to normal operating characteristics. Which category is being considered?
epa-608-leak-evidence-310. An owner elects retrofit/retirement instead of repairing an applicable above-trigger ODS leak. When is the plan generally developed?
epa-608-repair-plan-timing-3Answers & reasoning
1. Isolate leaking components from non-leaking components · Choice C
The relevant stated condition is: A leak prevents a normal evacuation target without substantial contamination. Apply the relevant source rule. When leaks prevent normal evacuation without substantial contamination, isolate where possible, fully evacuate non-leaking parts, and evacuate leaking parts to the lowest attainable level not above 0 psig. This supports “Isolate leaking components from non-leaking components”. The alternative “Treat every component as exempt” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-leaking-recovery-12. Applicable recovery-equipment performance standards · Choice D
The relevant stated condition is: An uncertified disposal worker uses recovery equipment. Apply the relevant source rule. The disposal-only certification exception does not remove recovery-equipment standards. Equipment used before final disposal must meet the applicable performance standards even when the person performing that specific recovery activity need not hold technician certification. This supports “Applicable recovery-equipment performance standards”. The alternative “A Universal credential requirement for every disposal-only worker” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-service-disposal-33. Both appliances have the same owner · Choice B
The relevant stated condition is: Recovered refrigerant from one supermarket rack is proposed for another rack owned by the same company. Apply the relevant source rule. Recovered refrigerant may be returned to equipment under the same ownership; transfer to another owner requires reclamation by an EPA-certified reclaimer. This supports “Both appliances have the same owner”. The alternative “Both appliances use the same refrigerant type” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-ownership-transfer-14. 10 inches Hg vacuum · Choice A
The relevant stated condition is: A whole high-pressure appliance has a full charge of 250 lb. Apply the relevant source rule. The whole appliance is high pressure with 250 lb full charge. Post-1993 recovery equipment selects the 10 inches Hg-vacuum table entry for the at-least 200 lb row. This is not the very-high-pressure zero-vacuum row. This supports “10 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.
epa-608-very-high-and-isolation-35. Industrial process refrigeration · Choice C
The relevant stated condition is: A customized appliance is directly linked to a chemical manufacturing process. Apply the relevant source rule. EPA classifies equipment by itsuse:comfortcooling controls occupied-building heat/humidity; commercial refrigeration includes retail food/cold storage; industrial process is linked to manufacturing processes. This supports “Industrial process refrigeration”. The alternative “Comfort cooling by default” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-cold-storage-classification-36. 2.4 lb · Choice A
The relevant stated condition is: A qualifying small appliance initially contains 3 lb. 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. 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.
epa-608-failed-compressor-37. The units and pressure references differ · Choice B
The relevant stated condition is: A low-pressure evacuation worksheet compares 25 mm Hg absolute with 25 inches Hg vacuum as if they were identical. Apply the relevant source rule. The values use different unit sizes and pressure references:millimetersHg absolute versus inches Hg vacuum. Equal numeral 25 does not establish equal pressure. This supports “The units and pressure references differ”. The alternative “The numbers must be added because both are 25” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-absolute-target-58. The applicable appliance definition and refrigerant charge · Choice D
The relevant stated condition is: Two appliances have similar cabinet sizes but different classifications. 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. This supports “The applicable appliance definition and refrigerant charge”. The alternative “Cabinet dimensions alone” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-charge-boundary-49. Follow-up verification · Choice C
The relevant stated condition is: A required test evaluates repaired equipment after return to normal operating characteristics. Apply the relevant source rule. A leak inspection locates leaks; an initial verification checks repair success; follow-up verifies after normal operating conditions subject to the stated professional-judgment exception. This supports “Follow-up verification”. The alternative “A refrigerant sales eligibility check” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-leak-evidence-310. Within 30 days of detecting the excessive leak · Choice D
The relevant stated condition is: An owner elects retrofit/retirement instead of repairing an applicable above-trigger ODS leak. Apply the relevant source rule. For an applicable ODS leak above its trigger, the ordinary repair period is 30 days; a required industrial-process shutdown can use 120 days. A retrofit/retirement plan is developed within 30 days and normally completed within 1 year. This supports “Within 30 days of detecting the excessive leak”. The alternative “Only after five years” uses a different condition or conclusion;the applicable rule above explains why it does not answer this case.
epa-608-repair-plan-timing-3Original source-grounded practice. Content and reasoning checks are separate from professional educator review, which remains pending. Not an official exam paper.