EPA 608 Type II practice test

1. A refrigerant has a liquid phase saturation pressure of 250 psia at 104 °F. Under the definitions, an appliance using it is which kind of appliance?

• A. Medium-pressure appliance
• B. Low-pressure appliance
• C. Very high-pressure appliance
• D. High-pressure appliance

2. One appliance is used partly for industrial process refrigeration and partly for other applications. When is it considered industrial process refrigeration equipment?

• A. When 50 percent or more of its operating capacity is used for industrial process refrigeration
• B. Only when all of its capacity serves an industrial process
• C. Whenever the owner chooses to classify it that way
• D. Whenever any part of its capacity serves an industrial process

3. Which appliances does the definition of comfort cooling name as examples?

• A. Industrial ice machines and ice rinks
• B. Supermarket display cases and walk-in coolers
• C. Chillers, commercial split systems, and packaged roof-top units
• D. Cold storage warehouse refrigeration

4. An appliance uses a refrigerant whose critical temperature is below 104 °F. Under the EPA definitions, which kind of appliance is it?

• A. Very high-pressure appliance
• B. Medium-pressure appliance
• C. High-pressure appliance
• D. Low-pressure appliance

5. Under the definitions, what does it mean to retire an appliance?

• A. Remove the refrigerant and disassemble or impair the refrigerant circuit so the appliance as a whole cannot be used by anyone in the future
• B. Convert it from one refrigerant to another
• C. Evacuate it to atmospheric pressure and temporarily shut it down
• D. Sell it to a new owner

6. Under the EPA definition, what does it mean to mothball an appliance?

• A. Permanently retire it and send it for disposal
• B. Evacuate its refrigerant to at least atmospheric pressure and temporarily shut it down
• C. Convert it from one refrigerant to another
• D. Leave it fully charged and turn off its power

7. An owner converts an appliance to a new refrigerant and, to make the system compatible with it, also changes the lubricant, filters, driers and o-rings. How does the definition of retrofit treat those changes?

• A. They make the work a retirement of the appliance
• B. They are part of retrofitting the appliance
• C. They count as mothballing the appliance
• D. They count as a seasonal variance

8. An owner needs the full charge of a high-pressure appliance (full charge of 50 or more pounds of a class I or class II refrigerant). Which of these is one of the four methods the definition of full charge allows?

• A. Actual measurements of the amount of refrigerant added to or evacuated from the appliance, including for seasonal variances
• B. The amount printed on the last refrigerant cylinder bought for the appliance
• C. The total refrigerant bought for the whole facility in the last calendar year
• D. The largest single refrigerant addition made in the past 12 months

9. Which pattern of refrigerant removal and addition fits the definition of a seasonal variance?

• A. Refrigerant is added every summer to make up for a slow leak
• B. Refrigerant is removed when the season changes, and more than that amount is added back later
• C. Refrigerant is removed one season and added back 18 months later
• D. Refrigerant is removed because of a seasonal change in ambient conditions, then an amount less than or equal to it is added back, both within one consecutive 12-month period

10. Using recovery equipment made in 2020, a technician must reach 15 inches of Hg vacuum before a major repair on which of these no-leak appliances?

• A. A high-pressure appliance with a full charge of less than 200 pounds
• B. A very high-pressure appliance
• C. A medium-pressure appliance with a full charge of 200 pounds or more
• D. A low-pressure appliance

11. For which of these appliances does Table 1 in 40 CFR 82.156 set the same evacuation level whether the recovery equipment was made before or after November 15, 1993?

• A. A high-pressure appliance with a full charge of 200 pounds or more
• B. A very high-pressure appliance
• C. A medium-pressure appliance with a full charge of less than 200 pounds
• D. A medium-pressure appliance with a full charge of 200 pounds or more

12. Before a major repair on a no-leak medium-pressure appliance with a 150-pound full charge, a technician's recovery machine made in 2010 reaches 10 inches of Hg vacuum. Under Table 1, is that enough?

• A. No, 15 inches of Hg vacuum is required
• B. Yes, 10 inches is the level for this appliance with equipment made on or after November 15, 1993
• C. No, 25 mm Hg absolute is required
• D. No, 29 inches of Hg vacuum is required

13. A technician recovers refrigerant from the air conditioner of a construction loader (an MVAC-like appliance) before the machine is scrapped. To which pressure level does 40 CFR 82.156(c) allow the technician to reduce the system?

• A. Reaching 0 psig
• B. Reaching 10 inches of Hg vacuum
• C. Reducing the system pressure to or below 102 mm of mercury vacuum
• D. Reaching 25 mm Hg absolute

14. A technician evacuates refrigerant from appliances with a full charge of more than 5 and less than 50 pounds so they can be disposed of. Which item must the technician's records include for each appliance?

• A. The appliance owner's phone number
• B. The appliance's serial number and purchase price
• C. The company name, location of the appliance, date of recovery, and type of refrigerant recovered
• D. A photograph of the empty appliance

15. A technician may evacuate only the part of an appliance being serviced, instead of the whole appliance, if the refrigerant in that part can be isolated to what?

• A. A disposable refrigerant cylinder
• B. A system receiver
• C. The recovery machine's filter-drier
• D. The appliance's suction line

16. Recovery and/or recycling equipment certified under 40 CFR 82.158(d), for use on appliances such as high-pressure systems, must have what on all hoses?

• A. Low-loss fittings
• B. Open-ended quick connectors
• C. Flare fittings
• D. Process stubs

17. Leaks in a high-pressure appliance make the Table 1 levels unattainable. Its leaking and non-leaking components have been isolated from each other. To what level must the non-leaking components to be opened be evacuated?

• A. No evacuation is required
• B. No higher than 0 psig
• C. No higher than 5 psig
• D. The levels specified in Table 1

18. A company services only appliances that it owns, and all of them contain pump-out units. Which requirement of 40 CFR 82.156 is the company exempt from?

• A. Evacuating the appliances to the Table 1 levels
• B. Having its technicians certified as Type II technicians
• C. Recovering refrigerant before opening the appliances
• D. Using certified, self-contained recovery and/or recycling equipment

19. A certified technician will open the air-conditioning system of a farm tractor, an MVAC-like appliance. Which equipment does 40 CFR 82.156(c) require the technician to be properly using?

• A. Any recovery machine that reaches the Table 1 level for high-pressure appliances
• B. Recovery and/or recycling equipment certified pursuant to § 82.158(f) or § 82.36, as applicable
• C. Small-appliance recovery equipment certified under appendix C
• D. System-dependent recovery equipment of any kind

20. A technician connects a recovery machine to a high-pressure appliance that holds a large charge. According to EPA's Type 2 test topics, what at the beginning of the job speeds up recovery?

• A. Recovering vapor first and leaving the liquid for last
• B. Recovering liquid at the beginning of the recovery process
• C. Briefly opening the system to the atmosphere to lower its pressure
• D. Running the recovery machine with its outlet valve closed

21. A recovery from a high-pressure appliance is running slower than the technician would like. Which combination of temperature changes do EPA's Type 2 test topics list as methods for speeding recovery?

• A. Heat the recovery vessel, and chill the appliance the refrigerant is being recovered from
• B. Heat both the recovery vessel and the appliance
• C. Chill the recovery vessel, and heat the appliance the refrigerant is being recovered from
• D. Chill both the recovery vessel and the appliance

22. A recovery machine has just pulled a high-pressure appliance down to the required recovery vacuum. Why do EPA's Type 2 test topics say to wait a few minutes before finishing?

• A. To see if system pressure rises, which would indicate liquid refrigerant still in the system or in the oil
• B. To let non-condensables vent to the atmosphere
• C. To let the gauges return to zero before disconnecting
• D. To let the recovery cylinder warm up so it can be filled further

23. As of April 10, 2020, the appliance maintenance and leak repair rules in 40 CFR 82.157 apply to which appliances?

• A. Appliances with a full charge of 50 or more pounds of any refrigerant, including substitutes alone
• B. All high-pressure appliances, regardless of charge size
• C. Appliances with a full charge of more than 15 pounds of any refrigerant
• D. Appliances with a full charge of 50 or more pounds of a class I or class II refrigerant, or a blend containing one

24. Under 40 CFR 82.157(c)(2), the 10 percent leak rate applies to comfort cooling appliances and to which other appliances?

• A. All commercial refrigeration equipment
• B. All industrial process refrigeration equipment
• C. Other appliances with a full charge of 50 or more pounds that are not commercial refrigeration or industrial process refrigeration
• D. Small appliances

25. A supermarket's display case system has a full charge of 50 or more pounds of a class II refrigerant. Which leak-rate category in 40 CFR 82.157 does it fall into?

• A. Commercial refrigeration
• B. Comfort cooling
• C. Industrial process refrigeration
• D. It is not covered by any leak-rate category

26. An owner chooses to repair an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant) but fails to bring the leak rate below the applicable rate. What must the owner then do?

• A. Pay a fixed penalty to EPA and keep operating
• B. Create and implement a retrofit or retirement plan
• C. Report the appliance to the state fire marshal
• D. Nothing more, because a repair was attempted

27. For an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant), when must the owner or operator calculate the leak rate?

• A. Every time refrigerant is added, except right after a retrofit or new installation, or for a seasonal variance
• B. Only once per calendar year
• C. Only when a leak inspection finds a leak
• D. Only when the appliance is disposed of

28. Leaks were repaired on an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant). The leaks are presumed repaired if there is no further refrigerant addition for how long after the repair?

• A. 10 days
• B. 30 days
• C. 3 months
• D. 12 months

29. An appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant) is over its leak rate. The only reason the repair needs more time is that replacement components are not available within 30 days. No industrial process shutdown is required, and the owner or operator meets the documentation and EPA request requirements for an extension. What is the latest the repair time can run, counted from the date the appliance exceeded the leak rate?

• A. 120 days
• B. 180 days
• C. 270 days
• D. 365 days

30. An appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant) is mothballed during its repair period. When do the repair time frames start running again?

• A. On the day additional refrigerant is added to the appliance (or the isolated leaking component)
• B. On the day the appliance is mothballed
• C. 12 months after the appliance is mothballed
• D. When EPA sends written approval

31. The owner of an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant) writes a retrofit or retirement plan. What is the longest schedule for completing the work that the plan may set?

• A. 30 days
• B. 90 days
• C. One year
• D. Five years

32. An appliance with 50 pounds or more of a class I or class II refrigerant leaked 125 percent or more of its full charge this calendar year. What deadline does 40 CFR 82.157 set for the owner or operator to submit a report to EPA?

• A. December 31 of the same year
• B. January 30 of the next year
• C. July 30 of the next year
• D. March 1 of the next year

33. An owner uses the annualizing method to calculate the leak rate of a high-pressure appliance (full charge of 50 or more pounds of a class I or class II refrigerant). Which number of days does the method divide by 365 days?

• A. Always 365 days
• B. The number of days since the appliance was installed
• C. The shorter of the number of days since the last day refrigerant was added or 365 days
• D. The number of days since the last leak inspection

34. A leak was repaired without evacuating an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant). Within how many days of the successful initial verification test must the follow-up verification test be done?

• A. 30 days
• B. 120 days
• C. 12 months
• D. 10 days

35. A leak repair on an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant) required evacuating part of the appliance. When must the initial verification test be performed?

• A. Before adding any refrigerant to the appliance
• B. After the appliance has run at normal conditions for 30 days
• C. Only after the next refrigerant addition
• D. Within 12 months of the repair

36. A commercial refrigeration appliance with a full charge of 500 or more pounds of a class I or class II refrigerant has exceeded its allowed leak rate. It has no automatic leak detection system. What leak inspection schedule does 40 CFR 82.157 set for it?

• A. Once per calendar year
• B. Once every two years
• C. Once every five years
• D. Once every three months

37. Under 40 CFR 82.157 (appliances with a full charge of 50 or more pounds of a class I or class II refrigerant), who must conduct the required leak inspections?

• A. An EPA inspector
• B. Any employee of the owner or operator, whether or not certified
• C. A certified technician
• D. The appliance manufacturer

38. An automatic leak detection system that directly detects refrigerant in air is used on an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant). What refrigerant concentration does the rule set as the level at which it must alert the owner or operator?

• A. 10 parts per million
• B. 500 parts per million
• C. 100 parts per million
• D. 1,000 parts per million

39. An automatic leak detection system on an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant) monitors the appliance's conditions instead of detecting refrigerant in air. When must it alert the owner or operator?

• A. When measurements indicate a loss of 50 pounds of refrigerant or 10 percent of the full charge, whichever is more
• B. When measurements indicate a loss of 50 pounds of refrigerant or 10 percent of the full charge, whichever is less
• C. Only when a technician next inspects the appliance
• D. When measurements indicate a loss of 20 percent of the full charge

40. A standing pressure decay test shows that an appliance is leaking but not where. Under the definition of leak inspection, what must such a method be used together with?

• A. A second standing pressure decay test
• B. A charging chart
• C. A sight glass check
• D. Methods that can determine the location of a leak

41. After a leak repair on an appliance covered by 40 CFR 82.157 (full charge of 50 or more pounds of a class I or class II refrigerant), it is unsafe to be present while the system runs at normal operating characteristics and conditions. When must the follow-up verification test be done?

• A. Only after the system has run at normal operating characteristics and conditions for 30 days
• B. Where practicable, before the system returns to normal operating characteristics and conditions
• C. Within 12 months of the repair
• D. Only after the next refrigerant addition

42. A commercial refrigeration appliance (full charge of 50 or more pounds of a class I or class II refrigerant) has exceeded its leak rate. An automatic leak detection system monitors only part of the appliance. What applies to the rest of the appliance?

• A. It is exempt from leak inspections because part of the appliance is monitored
• B. It continues to be subject to any applicable leak inspection requirements
• C. It needs a leak inspection only once every five years
• D. It must be retired within one year

43. On a high-pressure appliance (full charge of 50 or more pounds of a class I or class II refrigerant), the initial verification test shows that a leak repair was not successful. What does 40 CFR 82.157 allow the owner or operator to do?

• A. Conduct as many additional repairs and initial verification tests as needed within the applicable time period
• B. Wait 12 months before trying another repair
• C. Nothing more; the appliance must be retired the same day
• D. Skip the follow-up verification test for that leak

44. An automatic leak detection system that directly detects refrigerant in air replaces the leak inspections on a high-pressure appliance covered by 40 CFR 82.157. Where must its sensors or intakes be placed?

• A. Only at the building's fresh-air intake
• B. Only beside the refrigerant storage cylinders
• C. So they continuously monitor refrigerant concentrations in air in proximity to the compressor, evaporator, condenser, and other areas with a high potential for a refrigerant leak
• D. Anywhere in the building, as long as at least one sensor is used

45. For an appliance with a full charge of 50 or more pounds of a class I or class II refrigerant, how long must the owner or operator keep the records of its full charge and how it was determined?

• A. One year after the appliance is installed
• B. Until the next leak inspection
• C. Five years after the appliance is installed
• D. Until three years after the appliance is retired

46. A technician performs initial and follow-up verification tests on repaired leaks in a high-pressure appliance (full charge of 50 or more pounds of a class I or class II refrigerant). Which items must the owner's verification test records include?

• A. Only the date of the follow-up test
• B. The location(s) of all repaired leaks that were tested, the type(s) of verification test(s) used, and the results of those tests
• C. The cost of each repair
• D. The technician's certification exam score

47. A technician suspects that a high-pressure system with a hermetic compressor has been losing refrigerant. Which pair of signs of leakage do EPA's Type 2 test topics name for high-pressure systems?

• A. Excessive superheat, and traces of oil for hermetics
• B. Very low superheat, and frost on the compressor shell
• C. Higher-than-normal discharge pressure, and a clean, dry compressor shell
• D. A rise in condenser airflow, and faded paint on the cabinet

48. A technician has finished installing a new high-pressure split system and is about to put in its first refrigerant charge. According to EPA's Type 2 test topics, what comes before charging the equipment?

• A. A leak test
• B. Running the system for 24 hours on a partial charge
• C. Releasing a small amount of refrigerant to purge the lines
• D. Nothing, because leak tests are needed only on equipment that has been repaired

49. A technician will pressurize a high-pressure system to find a leak. Which ranking of leak test gases, from most to least preferred, matches EPA's Type 2 test topics?

• A. Pure refrigerant, then nitrogen with a trace quantity of R-22, then nitrogen alone
• B. Nitrogen with a trace quantity of R-22, then pure refrigerant, then nitrogen alone
• C. Nitrogen with a trace quantity of R-22, then nitrogen alone, then pure refrigerant
• D. Nitrogen alone, then nitrogen with a trace quantity of R-22, then pure refrigerant

50. A standard temperature-pressure chart gives 120 psig for a high-pressure refrigerant at a certain temperature. The technician needs the pressure in psia. Which value is it?

• A. 105.3 psia
• B. 120 psia
• C. 134.7 psia
• D. 149.9 psia

51. A technician is called to a home central air conditioner and needs to know which refrigerant it contains. Where does EPA say most air conditioners identify their refrigerant?

• A. On a nameplate on the unit
• B. On the thermostat display
• C. On the insulation of the refrigerant lines
• D. On the home's electric meter

52. A high-pressure system with a hermetic compressor has been pulled into a deep vacuum. What do EPA's Type 2 safety topics say about the compressor at this point?

• A. Run it briefly to confirm that the vacuum holds
• B. Energize it to help pull the vacuum deeper
• C. Energize it to boil moisture out of the oil
• D. Leave it de-energized while it is under vacuum

53. A high-pressure system is installed in an equipment room. Which equipment room requirement under ASHRAE Standard 15 do EPA's Type 2 safety topics name?

• A. An oxygen deprivation sensor, only with flammable refrigerants
• B. A carbon monoxide detector, with all refrigerants
• C. An oxygen deprivation sensor, with all refrigerants
• D. A refrigerant odorant injector, only with HFC refrigerants