CFC Core Test

62 Questions | Total Attempts: 144

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CFC Core Test

The following exam is produced to test knowledge of safe refrigerant handling and EPA regulations regarding the HVAC industry. �


Questions and Answers
  • 1. 
     __ is a blend of two or more components whose equilibrium vapor phase and liquid phase compositions are the same at a given pressure. (core)
    •  
    • A. 

      Azeotrope

    • B. 

      Compound

    • C. 

      Fractionation

    • D. 

      Halocarbon

  • 2. 
    __ is a halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine, and bromine. (core)
    • A. 

      Azeotrope

    • B. 

      Compound

    • C. 

      Fractionation

    • D. 

      Halocarbon

  • 3. 
    Chlorofluorocarbons (CFCs) consist of ___,  ___, and __ . (core)
    • A. 

      Chlorine, fluorine, carbon

    • B. 

      .chlorine, fluorine, cesium

    • C. 

      Carbon, fluorine, other chemicals

    • D. 

      Cesium, fluoride, carbon

    • E. 

      Chlorine, fluoride, carbon

  • 4. 
    CFCs are chemically very stable because they contain no __ .(core)
    •  
    • A. 

      Hydrogen

    • B. 

      Bromine

    • C. 

      Chlorine

    • D. 

      .air

  • 5. 
    CFCs are damaging to the __ ozone layer.(core)
    • A. 

      Atmospheric

    • B. 

      Stratospheric

    • C. 

      Marine

    • D. 

      Climatic

  • 6. 
    Of the three common types of refrigerants __ has the highest high ozone-depletion potential (ODP). (core)
    •  
    • A. 

      CFCs

    • B. 

      HCFCs

    • C. 

      HFCs

    • D. 

      LJCs

  • 7. 
    ______ test methods are assumed by the EPA as the most effective methods for locating the general area of small leaks. (core)
    •  
    • A. 

      Electronic and Ultrasonic

    • B. 

      Halide torch

    • C. 

      Soap bubble

    • D. 

      Both I and 2

  • 8. 
    After evacuation of a system, if the pressure rises ABOVE ambient pressure, then ____. (core)
    •  
    • A. 

      Trapped refrigerant is probably boiling-off .

    • B. 

      It could be a leak

    • C. 

      .both 1and 2

    • D. 

      None of the above

  • 9. 
     In cases where the refrigerant cannot be reclaimed due to contamination with other refrigerants, the refrigerant __ . (core)
    •  
    • A. 

      Can be legally vented to the atmosphere since it can't be reclaimed

    • B. 

      Must be destroyed by incineration at a approved facility

    • C. 

      Must be used only in Small Appliances

    • D. 

      Must be transferred into a disposable cylinder and discarded at a municipal landfill

  • 10. 
    The system vacuum gauge should be connected __ . (core)
    • A. 

      Close to the vacuum pump

    • B. 

      As close as possible to the system being evacuated

    • C. 

      In series to avoid EPA problems

    • D. 

      In parallel to avoid EPA problems

  • 11. 
    Manufacture of CFCs will be banned after December 31, __ .
    •  
    •   
    • A. 

      1994

    • B. 

      1995

    • C. 

      2000

    • D. 

      2010

  • 12. 
    A second category of refrigerants currently available is the hydrochlorofluorocarbons (HCFCs).  Although they contain chlorine, which is damaging to the ozone layer, they also contain_________, which makes them chemically less stable once they enter the atmosphere. (core)
    •  
    • A. 

      Hydrogen

    • B. 

      Water

    • C. 

      Bromine

    • D. 

      Helium

    • E. 

      Heptane

  • 13. 
    Under EPA's regulations, reclaimed refrigerant must meet __ standards for purity before it can be resold. .
    • A. 

      ARI-700

    • B. 

      ARI-740

    • C. 

      SAE 1792

    • D. 

      EPA 1992

  • 14. 
    __ recovery devices are so named because they depend on components of the system; that is, they capture refrigerant with the assistance of components in the air conditioning or refrigeration equipment they are emptying.
    •  
    • A. 

      System-dependent

    • B. 

      Self-contained

    • C. 

      System-independent

    • D. 

      Approved

    • E. 

      Illegal

    • F. 

      Automatic

  • 15. 
    All devices used for refrigerant recovery must meet __ standards.
    •  
    • A. 

      EPA

    • B. 

      DOT

    • C. 

      DOE

    • D. 

      EPRI

  • 16. 
    List one HCFC:
    • A. 

      R134a

    • B. 

      R12

    • C. 

      R22

    • D. 

      R113

  • 17. 
    Refrigerants which contain no chlorine at all are called __ .
    •  
    • A. 

      CFCs

    • B. 

      HCFCs

    • C. 

      HFCs

    • D. 

      ODCs

  • 18. 
    CHF2CF3 refrigerant is a __ .
    • A. 

      HFC

    • B. 

      HCFC

    • C. 

      HFCF

    • D. 

      HBFC

  • 19. 
    Ozone in the stratosphere consists of' molecules containing __ oxygen atom(s).
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 20. 
    __ in refrigerants causes ozone destruction.
    •  
    • A. 

      Chlorine

    • B. 

      Fluorine

    • C. 

      Both chlorine and fluorine

    • D. 

      Both fluoride and carbon

  • 21. 
    CFCs are able to reach the stratosphere because __ .
    •  
    • A. 

      They are chemically very stable

    • B. 

      They are chemically very unstable

    • C. 

      They are lighter than air

    • D. 

      They are very toxic

  • 22. 
    The lower case letter following the refrigerant number, as in 134a for example, is the:
    • A. 

      Number of A atoms

    • B. 

      Number of A molecules

    • C. 

      .form of the isomer

    • D. 

      Stands for advanced molecule.

  • 23. 
    ________ refrigerants are toxic.
    •  
    • A. 

      Group 1

    • B. 

      Group 2

    • C. 

      Group 3

    • D. 

      Group 4

  • 24. 
    __ refrigerants are nonflammable mixtures of group 1 and 3 refrigerants, which are nonflammable as formulated but whose composition can become flammable due to fractionation under some leakage situations.
    • A. 

      Group 1

    • B. 

      Group 2

    • C. 

      Group 3

    • D. 

      Group 4

  • 25. 
    __ refrigerants are flammable but not toxic.
    • A. 

      Group 1

    • B. 

      Group 2

    • C. 

      Group 3

    • D. 

      Group 4