Type Of Refrigerant Vacuum Pump Quiz

85 Questions | Total Attempts: 730

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Type Of Refrigerant Vacuum Pump Quiz

A refrigerator helps keep food from going bad at the house or the office. To be able to fix a refrigerator ensure you give it to someone certified to work on refrigerators. Are you working to get that certificate? The test below is designed to jolt your memory on refrigerator pumps. Good luck in the exams.


Questions and Answers
  • 1. 
    When moisture is present in a refrigeration system, it will react with the refrigerant and the oil to form ________.
    • A. 

      Carbon dioxide

    • B. 

      Acid

    • C. 

      Carbon monoxide

    • D. 

      All of the above

  • 2. 
    Which of the following represents the lowest vacuum?
    • A. 

      10 psia

    • B. 

      5" Hg VAC

    • C. 

      5 psig

    • D. 

      1000 microns

  • 3. 
    To pull a vacuum means to ________.
    • A. 

      Raise the pressure in a refrigeration system

    • B. 

      Lower the pressure in a refrigeration system below atmospheric

    • C. 

      Allow refrigerant to escape into the atmosphere

    • D. 

      Condense the gas in the system

  • 4. 
    A compound gauge ________.
    • A. 

      Indicates pressures above 14.696 psia

    • B. 

      Indicates pressures in inches Hg below atmospheric pressure

    • C. 

      Is one of two gauges on a typical gauge manifold

    • D. 

      All of the above

  • 5. 
    A micron gauge is used to measure
    • A. 

      Atmospheric pressures at high altitudes

    • B. 

      Atmospheric pressures at sea level

    • C. 

      Absolute pressures below 1 mm Hg

    • D. 

      High pressure in a refrigeration system

  • 6. 
    The best method of leak checking is when the refrigeration system is ________.
    • A. 

      In a vacuum

    • B. 

      Open to the atmosphere

    • C. 

      Operation with all fans activated

    • D. 

      Standing with dry nitrogen pressure of 150 psig in the system

  • 7. 
    Noncondensable gases ________.
    • A. 

      Are desirable in a refrigeration system

    • B. 

      Are undesirable in a refrigeration system

    • C. 

      Condense readily under normal atmospheric conditions

    • D. 

      Help in pulling a vacuum

  • 8. 
    What is the most accurate instrument for checking a deep vacuum?
    • A. 

      Compound gauge

    • B. 

      Mercury "U" tube manometer

    • C. 

      Mercury barometer

    • D. 

      Electronic vacuum gauge

  • 9. 
    To insure accurate testing, the best material to use for connecting lines to the vacuum pump and gauge set is ________.
    • A. 

      Light flexible hose

    • B. 

      Heavy duty rubber gauge line

    • C. 

      Copper tube

    • D. 

      Garden hose

  • 10. 
    A multiple evacuation means that ________.
    • A. 

      You connect three vacuum pumps simultaneously to a refrigeration system and pull a vacuum

    • B. 

      You pull a vacuum on three different systems at the same time

    • C. 

      You pull a vacuum on a refrigeration system more than once, allowing refrigerant or nitrogen into the system between each procedure

    • D. 

      There must be more than one system operating before a vacuum can be pulled

  • 11. 
    Moisture in a liquid state must be ________ before it can be removed with a vacuum pump.
    • A. 

      Vaporized

    • B. 

      Condensed

    • C. 

      Cooled

    • D. 

      Solidified

  • 12. 
    How many chlorine atoms does it take to destroy 100,000 ozone molecules in the stratosphere?
    • A. 

      10

    • B. 

      1

    • C. 

      100

    • D. 

      10,000

  • 13. 
    Which of the following refrigerants is a CFC-type refrigerant?
    • A. 

      R-22

    • B. 

      R-123

    • C. 

      R-134a

    • D. 

      R-12

  • 14. 
    Which of the following is an example of an HCFC refrigerant?
    • A. 

      R-12

    • B. 

      R-402

    • C. 

      R-22

    • D. 

      R-134a

  • 15. 
    Which of the following refrigerants is considered an HFC-type of refrigerant?
    • A. 

      R-134a

    • B. 

      R-12

    • C. 

      R-22

    • D. 

      R-11

  • 16. 
    Which type of refrigerant has the highest Ozone Depletion Potential (ODP)?
    • A. 

      HFC

    • B. 

      HCFC

    • C. 

      CFC

    • D. 

      All have the same ODP.

  • 17. 
    What effect is ozone depletion having on the environment?
    • A. 

      Increased ground level ozone (smog)

    • B. 

      Reduced marine life

    • C. 

      Reduced crop fields

    • D. 

      All of the above

  • 18. 
    The abbreviation for refrigerants containing chlorine, fluorine, and carbon is ________.
    • A. 

      HFC

    • B. 

      HCFC

    • C. 

      CFC

    • D. 

      HFAC

  • 19. 
    The abbreviation for refrigerants containing chlorine, fluorine, carbon, and hydrogen is ________.
    • A. 

      HFC

    • B. 

      HCFC

    • C. 

      CFC

    • D. 

      HFAC

  • 20. 
    The abbreviation for refrigerants containing fluorine, carbon, and hydrogen is ________.
    • A. 

      HFC

    • B. 

      HCFC

    • C. 

      CFC

    • D. 

      HFAC

  • 21. 
    To reprocess refrigerant to meet new product specifications is called ________.
    • A. 

      Recovery

    • B. 

      Renew

    • C. 

      Reclaim

    • D. 

      Recycle

  • 22. 
    To clean refrigerant by the use of filter dryers is called 
    • A. 

      Recovery

    • B. 

      Renew

    • C. 

      Reclaim

    • D. 

      Recycle

  • 23. 
    To remove the refrigerant from a system without any testing or processing and to be put back into the same system is called ________.
    • A. 

      Recovery

    • B. 

      Renew

    • C. 

      Reclaim

    • D. 

      Recycle

  • 24. 
    Refrigerants that are made up of two refrigerants that, when blended in the right proportions, combine to make a third stable refrigerant, are called ________.
    • A. 

      Blends

    • B. 

      Azeotropes

    • C. 

      Near azeotropes

    • D. 

      Mixtures

  • 25. 
    The ozone depletion factor of R-12 is ________.
    • A. 

      0.8

    • B. 

      0.016

    • C. 

      0.05

    • D. 

      1.0

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