EPA Type

25 Questions | Total Attempts: 38

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EPA Quizzes & Trivia

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Questions and Answers
  • 1. 
    Avoid charging a low temperature refrigeration system too quickly"
    • A. 

      A. because the refrigerant vapor will slug the compressor

    • B. 

      B. because the refrigerant vapor will flood the compressor

    • C. 

      C. because the refrigerant vapor might overload the compressor

    • D. 

      D. all of the above

  • 2. 
    How should a newly installed residential split system be check for leaks?
    • A. 

      A. pull a vacuum

    • B. 

      B. pressurize the system with a trace gas mixture

    • C. 

      C. pressurize the system with HCFC-22 and an inert gas, then check for leaks

    • D. 

      D. pressurize the system with refrierant to psig

  • 3. 
    If a system that has been shut down for some time and itcontains liquid, the liquid can usually be found in:
    • A. 

      A. the lowest part of a system

    • B. 

      B. the coolest part of a system

    • C. 

      C. the evaporator

    • D. 

      D. none of the above

  • 4. 
    A system that has a low charge as the result of a leak has:
    • A. 

      A. a higher than normal superheat

    • B. 

      B. a higher than normal subcooling

    • C. 

      C. a lower than normal superheat

    • D. 

      D. a lower than noraml subcooling

  • 5. 
    What must you do before you use a recovery unit on equipment with a different type of refrigerant?
    • A. 

      A. nothing as long as the next refrigerant is the same type, i.e. both CFCs or HCFCs ect.

    • B. 

      B. recovery equipment must be used only with the same type of refrigerant

    • C. 

      C. remove all of the first refrigerant from the unit before starting the next job

    • D. 

      D. recover any remaining refrigerant from the unit before starting the next job

  • 6. 
    In order to speed up your repair work you may:
    • A. 

      A. isolate most of the refrigerant in the reciver or storage tank

    • B. 

      B. not have to recover the refrigerant if only a small amount will leak out because of your speedy repair

    • C. 

      C. not have to remove the refrigerant if the repair is very small

    • D. 

      D. all of the above

  • 7. 
    If an air condtioning system containing  pounds of refrigerant is leaking 9.5 pounds of refriergant every 12 months:
    • A. 

      A. you must repair all leaking system

    • B. 

      B. the leak does not have to be repaired if you have a written plan to replace the equipment within the next year

    • C. 

      C. you only have to repair the leak if it exceeds 21 pounds each 12 months

    • D. 

      D. you do not have to repair the leak

  • 8. 
    Why do you have to wait a few minutes befor eremoving the recovery equipment from the system after the required vacuum is reached?
    • A. 

      A. to see if there is going to be any more refrigerant released from the oil

    • B. 

      B. so the pressures in the hoses will equalize so they are easier to remove

    • C. 

      C. to enable the fittings to cool so that they will not burn your fingers

    • D. 

      D. to check for leaks

  • 9. 
    The EPA defines a "system-dependent" recovery system as:
    • A. 

      A. one designed by a manufacturer for use with only one type of system

    • B. 

      B. one that is permanently attatched to the system

    • C. 

      C. one that relise on a compressor in the appliance for recovery

    • D. 

      D. none of the above

  • 10. 
    A system can be charged with liquid:
    • A. 

      A. through the low-side, if the system is off

    • B. 

      B. through the high-side, if the system is in a vacuum

    • C. 

      C. if the cylinder can be heated

    • D. 

      D. all of the above

  • 11. 
    Starting a semi-hermetic reciprocating compressor with the discharge valve closed:
    • A. 

      A. will strave the compressor of oil

    • B. 

      B. will cause it to trip on low head pressure

    • C. 

      C. can cause a hydrostatic lock and bent rod

    • D. 

      D. may rupture the refrigerant hose

  • 12. 
    If a system is pressurized with nitrogen which of the following leak checking methods can be used?
    • A. 

      A. soap bubbles

    • B. 

      B. halite torch

    • C. 

      C. A&B

    • D. 

      D. electronic leak detector

  • 13. 
    How long do you have to repair a leaking system if the leak is above the EPA minimums?
    • A. 

      A. 60 days

    • B. 

      B. 24 hours

    • C. 

      C. 25 days

    • D. 

      D. 30 days

  • 14. 
    Which of the refrigerant  should be mixed with with nitrogen to make a trace gas for detection leaks?
    • A. 

      A. R-502

    • B. 

      B. R-22

    • C. 

      C. R-12

    • D. 

      D. all of the above

  • 15. 
    • A. 

      A. system trash

    • B. 

      B. acid

    • C. 

      C. oil

    • D. 

      D. all of the above

  • 16. 
    After using a recovery unit to remove the refrigerant from a burned-out hermetic compressor you should:
    • A. 

      A. change the oil in the recovery unit compressor

    • B. 

      B. clean the coils and metering device with R-11

    • C. 

      C. recycle the refrigerant back into the repaired unit

    • D. 

      D. blow out the system with compressed air

  • 17. 
    Recovered refrigerant may be:
    • A. 

      A. destroyed

    • B. 

      B. reused in equipment owned by the same person

    • C. 

      C. recycled in the same equipment

    • D. 

      D. all of the above

  • 18. 
    Liquid can be removed from a system if it:
    • A. 

      A. is not acidic

    • B. 

      B. has had the oil trapped seperatly

    • C. 

      C. does not have moisture trapped in it

    • D. 

      D. does not have to pass through the recovery unit compressor

  • 19. 
    The purpose of a double or triple evacuation is to:
    • A. 

      A. remove acid

    • B. 

      B. remove moisture

    • C. 

      C. remove contaminated oil

    • D. 

      D. all of the above

  • 20. 
    When using a recovery unit that was manufactured in January 1994 on a system containing 10 pounds of R-22 you must recover the refrigerant to:
    • A. 

      A. 15 inches of Hg vacuum

    • B. 

      B. 10 inches of Hg vacuum

    • C. 

      C. 4 inches of Hg vacuum

    • D. 

      D. 0 inches of Hg vacuum

  • 21. 
    Oil foams as the result as of:
    • A. 

      A. moisture in the refrigerant

    • B. 

      B. a change in temperature

    • C. 

      C. refrigerant boiling out

    • D. 

      D. acid in the refrigerant

  • 22. 
    When liquid and vapor refrigerant exist in the same part of a system the refrigerant is said to be:
    • A. 

      A. under a high pressure

    • B. 

      B. subcooled

    • C. 

      C. saturated

    • D. 

      D. superheated

  • 23. 
    Ideally the suction line should contain:
    • A. 

      A. superheated vapor

    • B. 

      B. no oil

    • C. 

      C. very little liquid

    • D. 

      D. subcooled refrigerant

  • 24. 
    When the pressure in a system is 14.7 psia, the compuind reffrigerant gauge should read:
    • A. 

      A. 14.7 psig

    • B. 

      B. 0 psig

    • C. 

      C. 29.4 inches of Hg

    • D. 

      D. 14.7 inches of Hg

  • 25. 
    When evacuating an open drive compression system, the vacuum should be capcle of pulling a vacuum of:
    • A. 

      A. 0 psig

    • B. 

      B. 4 inches of Hg vacuum

    • C. 

      C. 29 inches of Hg vacuum

    • D. 

      D. 15 inches of Hg vacuum