EPA 608 Type I — small appliances: free practice test

25 questions · Type I — small appliances. Pick an answer for each, then check. Explanations cite the rule each question tests.

1. 1. A Type I appliance contains no more than how much refrigerant?

   2 lb5 lb10 lb50 lb

2. 2. When recovering from a small appliance with a working compressor using recovery equipment made after November 15, 1993, you must recover:

   50% of the charge80% of the charge or achieve 4 in Hg vacuum90% of the charge or achieve 4 in Hg vacuum100% of the charge

3. 3. If the compressor of a small appliance is not operating, the required recovery is:

   80% of the charge or 4 in Hg vacuum90% of the charge or 4 in Hg vacuum95% of the chargeRecovery is not required

4. 4. Passive recovery on a small appliance is also called:

   Push-pullSystem-dependent recovery, using the appliance's own compressor or pressureSelf-contained recoveryLiquid recovery

5. 5. A piercing-type access valve should be:

   Left permanently on the systemRemoved after recovery and the line brazed or capped, because such valves are prone to leakUsed only on Type II systemsInstalled on the high side only

6. 6. Which technique helps recover more refrigerant from a small appliance whose compressor is not running?

   Heating the compressor and tapping it, or using a vacuum pump-assisted recoveryAdding oil to the systemChilling the recovery cylinder onlyVenting briefly to break the vacuum

7. 7. Recovery equipment for small appliances must be certified by:

   The manufacturer onlyAn EPA-approved equipment testing organization (e.g., AHRI/UL) — lab certificationOSHAThe state licensing board

8. 8. Type I certification allows work on which of the following?

   Residential split systemsDomestic refrigerators, window AC units, and dehumidifiersLow-pressure chillersAny appliance under 50 lb

9. 9. Refrigerant recovered from a small appliance may be returned to the same appliance or another owned by the same person:

   NeverWithout reclamation, as recycled refrigerantOnly after AHRI 700 reclamationOnly if it is R-12

10. 10. Nitrogen may be used to pressurize a system for leak testing if:

    It is mixed with R-22 as a trace gas — this is allowedOnly dry nitrogen is used, never oxygen or compressed airThe system is a Type III chillerThe technician holds Type II

11. 11. The typical charge of a household refrigerator is closest to:

    Under 1 lb (often 4–8 oz)5–10 lb15 lb50 lb

12. 12. Before beginning recovery from a small appliance, the technician should verify the appliance's charge by:

    Weighing the whole unitReading the nameplate/data plate, which lists refrigerant type and chargeGuessing from the cabinet sizeMeasuring line temperature

13. 13. When using a system-dependent recovery process on a small appliance with an operating compressor, refrigerant is typically captured in:

    An evacuated recovery cylinder or non-pressurized container, using the appliance's own compressorThe recovery unit's oil separatorA vacuum pumpAn open bucket of ice water

14. 14. Recovery from a small appliance is considered complete under the 4 in Hg standard when:

    The vacuum holds momentarilyThe required vacuum level is reached and the system pressure does not rise above it after settling (no significant re-rise from refrigerant boiling out of the oil)The compressor stopsFrost forms on the suction line

15. 15. The sale of small cans of substitute refrigerant (2 lb or less, e.g. for MVAC top-off) to non-certified persons is:

    Always bannedAllowed only for cans with self-sealing valves (an exemption to the sales restriction)Allowed for any can sizeAllowed with a written waiver

16. 16. A solderless piercing valve is best suited to:

    Permanent service access on any systemTemporary access on copper or aluminum process tubes of small appliances during recoveryHigh-pressure liquid lines on split systemsLow-pressure chillers

17. 17. If a small appliance's compressor does not run and the technician uses a self-contained (active) recovery unit, the required recovery level is:

    4 in Hg vacuum or 80% of the charge90% of the charge always0 psig25 mm Hg absolute

18. 18. Recovered refrigerant that will be reused in the SAME owner's equipment:

    Must be reclaimed firstMay be recycled (or simply returned) without meeting AHRI 700Must be destroyedMust be sent to the EPA

19. 19. Which condition makes recovery from a small appliance faster?

    Cold ambient temperatures around the applianceWarming the appliance (e.g., running it briefly before recovery) so refrigerant pressure is higherFilling the recovery cylinder to 95%Leaving the door open

20. 20. The DOT classification/label required when shipping a filled refrigerant recovery cylinder is:

    Class 3 flammable liquidClass 2.2 non-flammable gasClass 8 corrosiveNo label is needed

21. 21. Before transferring refrigerant into a recovery cylinder, the technician must confirm the cylinder:

    Is painted whiteIs within its hydrostatic test date, rated for the refrigerant, and evacuated or holding only the same refrigerantHas at least 50% charge alreadyBelongs to the certifier

22. 22. A small appliance sealed system that reads 0 psig before recovery most likely:

    Is fully chargedHas already lost its charge through a leak — there may be nothing left to recover, but recovery equipment must still be attached to verifyIs a Type II systemContains only oil

23. 23. Persons servicing small appliances for disposal (e.g., a scrap yard receiving refrigerators) must either recover the refrigerant themselves or:

    Nothing furtherObtain a signed statement that the refrigerant was recovered by the prior person in the disposal chainVent it as de minimisRemove only the compressor

24. 24. Excess refrigerant vapor left in a recovery hose when disconnecting is minimized by:

    Long hoses without valvesLow-loss fittings or hand valves at the hose endsVenting the hose after each useHeating the hose

25. 25. When pressurizing a dead small-appliance system to find a leak, the safest gas and method is:

    Oxygen at 150 psigCompressed air at 100 psigDry nitrogen through a regulator, pressure kept within the system's rated limitsAcetylene at low pressure