Chlorofluorocarbon (CFC) Refrigeration Practice Exam (100 Questions)
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The topic is Chlorofluorocarbon (CFC) Refrigeration. The following exam is produced to test knowledge of safe refrigerant handling and EPA regulations regarding the HVAC industry. It contains over hundred questions of the topic to make sure your knowledge level gets tested so you can prepare yourself for the final exam.
- 1.__ is a blend of two or more components whose equilibrium vapor phase and liquid phase compositions are the same at a given pressure.
- 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.
- A.
Azeotrope
- B.
Compound
- C.
Fractionation
- D.
Halocarbon
- 3.Chlorofluorocarbons (CFCs) consist of ___, ___, and __ .
- A.
Chlorine, fluorine, carbon
- B.
.chlorine, fluorine, cesium
- C.
Carbon, fluorine, other chemicals
- D.
Cesium, fluoride, carbon
- E.
Chlorine, fluoride, carbon
- 4.
- A.
Hydrogen
- B.
Bromine
- C.
Chlorine
- D.
.air
- 5.CFCs are damaging to the __ ozone layer.
- A.
Atmospheric
- B.
Stratospheric
- C.
Marine
- D.
Climatic
- 6.Of the three common types of refrigerants __ has the highest high ozone-depletion potential (ODP).
- 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.
- 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 ____.
- 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 __ .
- 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.
- 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.
- 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
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