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Cfc Practice Exam (100 Questions)

100 Questions  I  By Pbarton
CFC practice exam (100 Questions)
The following exam is produced to test knowledge of safe refrigerant handling and EPA regulations regarding the HVAC industry. �

  
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Question Excerpt

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1.   __ is a blend of two or more components whose equilibrium vapor phase and liquid phase compositions are the same at a given pressure.
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A.
B.
C.
D.
2.  __ is a halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine, and bromine.
A.
B.
C.
D.
3.  Chlorofluorocarbons (CFCs) consist of ___,  ___, and __ .
A.
B.
C.
D.
E.
4.  CFCs are chemically very stable because they contain no __ .
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A.
B.
C.
D.
5.  CFCs are damaging to the __ ozone layer.
A.
B.
C.
D.
6.  Of the three common types of refrigerants __ has the highest high ozone-depletion potential (ODP).
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A.
B.
C.
D.
7.  _ test methods are assumed by the EPA as the most effective methods for locating the general area of small leaks.
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A.
B.
C.
D.
8.  After evacuation of a system, if the pressure rises ABOVE ambient pressure, then ____.
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B.
C.
D.
9.   In cases where the refrigerant cannot be reclaimed due to contamination with other refrigerants, the refrigerant __ .
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A.
B.
C.
D.
10.  The system vacuum gauge should be connected __ .
A.
B.
C.
D.
11.  Manufacture of CFCs will be banned after December 31, __ .
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  •   
A.
B.
C.
D.
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.
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A.
B.
C.
D.
E.
13.  Under EPA's regulations, reclaimed refrigerant must meet __ standards for purity before it can be resold. .
A.
B.
C.
D.
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.
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A.
B.
C.
D.
E.
F.
15.  All devices used for refrigerant recovery must meet __ standards.
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A.
B.
C.
D.
16.  List one HCFC:
A.
B.
C.
D.
17.  Refrigerants which contain no chlorine at all are called __ .
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A.
B.
C.
D.
18.  CHF2CF3 refrigerant is a __ .
A.
B.
C.
D.
19.  Ozone in the stratosphere consists of' molecules containing __ oxygen atom(s).
A.
B.
C.
D.
20.  __ in refrigerants causes ozone destruction.
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A.
B.
C.
D.
21.  CFCs are able to reach the stratosphere because __ .
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A.
B.
C.
D.
22.  The lower case letter following the refrigerant number, as in 134a for example, is the:
A.
B.
C.
D.
23.  ________ refrigerants are toxic.
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B.
C.
D.
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.
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B.
C.
D.
25.  __ refrigerants are flammable but not toxic.
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B.
C.
D.
26.  __ refrigerants do not show flame propagation.
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  •   
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B.
C.
D.
27.  R-134a tanks are __________.
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B.
C.
D.
28.  Disposable cylinders are manufactured to specifications established by the_.
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B.
C.
D.
E.
29.  Every refrigerant cylinder is equipped with a device that will automatically vent pressure from the cylinder before it reaches the rupture point. What is this devise called?
A.
B.
C.
D.
30.  Refillable cylinders are regulated in their design, fabrication and testing by the _________ for use in the transportation of refrigerants-
A.
B.
C.
D.
31.  Capturing and ultimately eliminating the use of chlorofluorocarbons is being done in the United States to stop damage to the __ ozone layer.
A.
B.
C.
D.
32.  State and local governments may establish laws that contain __ regulations than Clean Air Act/EPA regulations.
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B.
C.
D.
33.  The Clean Air Act __ .
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B.
C.
D.
34.  Before you dispose of any appliance containing refrigerant, you must recover the refrigerant.
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B.
C.
D.
E.
F.
35.  CFCs can no longer be manufactured or imported into the United States after _____
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B.
C.
D.
36.  Recovery cylinders are painted __ in the shoulder area and twelve inches down the side.
A.
B.
C.
D.
37.  Refrigerant cylinders must bere-tested at ______ intervals.
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B.
C.
D.
38.  Chemically, oxygen is 02, and ozone is _____.
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B.
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D.
E.
39.  After __ individuals servicing and disposing of air conditioning and refrigeration equipment are prohibited from knowingly venting refrigerant into the atmosphere.
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B.
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F.
40.  Under the EPA equipment certification requirement, mandatory equipment certification would go into effect on __ .
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F.
41.  Under the EPA Final Rule, technician certification requirements would go into effect on
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B.
C.
D.
E.
F.
42.  ______ means to clean refrigerant for reuse by oil separation and single or multiple passes through devices, such as replaceable core filter-driers, which reduce moisture, acidity and particulate matter.
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B.
C.
D.
43.  __ requires chemical analysis of the refrigerant to verify that the ARI 700 Purity Specifications are met.
A.
B.
C.
D.
44.  __ means, to remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it in any way.
A.
B.
C.
D.
45.  Used disposable refrigerant cylinders can be _____. '
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B.
C.
D.
46.  The internal pressure of a cylinder with one pound of liquid refrigerant is __ the internal pressure of a full 50-pound cylinder.
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B.
C.
D.
47.  Refillable containers must meet __ requirements.
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B.
C.
D.
48.  Approved refillable tanks should never be filled to more than __ of their total capacity.
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B.
C.
D.
49.  The ozone layer absorbs and scatters __ light from the sun, which prevents harmful amounts from reaching the earth.
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B.
C.
D.
50.  Ozone at ground level is __ .
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B.
C.
D.
51.  When ozone depletion occurs, ______UV radiation penetrates to the Earth's surface.
A.
B.
C.
D.
52.  ______ containing compounds, which are contained in typical Halon fire extinguishers, also destroy the ozone.
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B.
C.
D.
53.  The Environmental Protection Agency is authorized to pay awards of up to _____ to any person who furnishes information which leads to a criminal conviction of another person for violation of the Clean Air Act
A.
B.
C.
D.
54.  ) The excise tax rate on refrigeration applies to _________refrigerants.
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B.
C.
D.
55.  Mixtures of __ that are used as holding charges or as leak test gases are not subject to the July 1, 1992 prohibition.
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B.
C.
D.
56.  Under EPA regulations, equipment manufactured on or after __ has to be certified to meet certain standards.
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B.
C.
D.
57.  Under the Clean Air Act, the EPA is authorized to assess fines of up to __ per day per violation for any violation of the Clean Air Act.
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B.
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D.
58.  Hydrochlorofluorocarbon (HCFC) refrigerants contain __ .
A.
B.
C.
D.
59.  Hydrofluorocarbon (HFC) refrigerants contain __ .
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B.
C.
D.
60.  HFC fluorocarbon refrigerants cause no harm to the stratospheric ozone, they have
A.
B.
C.
D.
61.  __  are a result of damage to the Earth's ozone layer.
A.
B.
C.
D.
62.  The existence of __ in the upper stratosphere indicates that the ozone layer is being destroyed.
A.
B.
C.
D.
63.  Since __ it has been illegal to knowingly release CFC and HCFC refrigerants during the service, maintenance, repair or disposal of appliances.
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B.
C.
D.
64.  Since it has been illegal to knowingly release HFC refrigerants during the service, maintenance, repair or disposal of appliances.
A.
B.
C.
D.
65.  __ are controlled by the Montreal Protocol
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B.
C.
D.
66.  The equipment covered by EPA regulations includes all air conditioning and refrigeration equipment containing and using ______refrigerants.
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B.
C.
D.
E.
F.
G.
67.  __ recovery devices can capture liquid and/or vapor refrigerant without the assistance of components in the air conditioning or refrigeration equipment
A.
B.
C.
D.
E.
F.
68.  Hygroscopic means affinity for __ .
A.
B.
C.
D.
69.  The oils that will be employed with most of the HFC-134a refrigeration applications are:
A.
B.
C.
D.
70.  The synthetic lubricant presently used with ternary blends is __ .
A.
B.
C.
D.
71.  A __ refrigerant has a range of boiling points or condensing points throughout the evaporator and condenser, respectively. The term used to describe this is temperature glide" or "gliding-temperature."
A.
B.
C.
D.
72.  A __ blend is a two-part mixture.
A.
B.
C.
D.
73.  The __ changes a high-pressure vapor to a high-pressure liquid.
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B.
C.
D.
74.  The component which changes a low-pressure vapor to a high-pressure vapor is the
A.
B.
C.
D.
75.  __ is the cleaning of refrigerant for reuse by oil separation and single or multiple passes through moisture absorption devices.
A.
B.
C.
D.
76.  __ is defined as processing refrigerant to a level equal to new product specifications as determined by chemical analysis.
A.
B.
C.
D.
77.  _______ is the transfer of refrigerant, in any condition, from a system to a storage container, without testing or purifying the refrigerant in any way.
A.
B.
C.
D.
78.  During dehydration of a refrigeration system, the refrigeration system can be___________ to decrease dehydration time
A.
B.
C.
D.
79.  When recharging an R-11 system, the first step is to charge the unit with refrigerant vapor __ . 
A.
B.
C.
D.
E.
80.  The EPA defines a __ as an appliance that uses a refrigerant with a boiling point below -50°C at atmospheric pressure (29.9 inches of mercury). This definition includes but is not limited to equipment utilizing refrigerants -13 and -503.
A.
B.
C.
D.
81.  System vacuum level is measured with the __
A.
B.
C.
D.
82.  When leak testing a low pressure centrifugal with nitrogen, the maximum test pressure is______ psig.
A.
B.
C.
D.
83.  The EPA defines __ as any service, maintenance, or repair on an appliance that could reasonably be expected to release refrigerant from the appliance to the atmosphere unless the refrigerant was previously recovered from the appliance.
A.
B.
C.
D.
84.  The EPA defines __ as the length of tubing that provides access to the refrigerant inside a small appliance or room air conditioner and that can be resealed at the conclusion of repair or service.
A.
B.
C.
85.  After completing the transfer of liquid refrigerant between the recovery unit and the refrigeration system, you must be careful to avoid trapping liquid refrigerant between service valves because
A.
B.
C.
D.
86.  A device that removes air and other non-condensables from the top of the condenser of a centrifugal refrigeration system during operation is called a ____.
A.
B.
C.
D.
87.  The EPA defines __ as any of the following products that are fully manufactured, charged, and hermetically sealed in a factory with five pounds or less of refrigerant: refrigerators and freezers designed for home use, room air conditioners (including window air conditioners and packaged terminal air conditioners), packaged terminal heat pumps, dehumidifiers, under-the-counter ice makers, vending machines, and drinking water coolers.
A.
B.
C.
D.
88.  Whenever a technician is working with any _______, the technician should always review the material safety data sheets, which by law should be shipped by the manufacturer with these compounds.
A.
B.
C.
D.
89.  When recovering refrigerant from an R-11 system, the service technician should keep the evaporator chiller water flowing to avoid __ .
A.
B.
C.
D.
90.  Refrigerant vapors or mist in high concentrations should not be inhaled since they have been demonstrated to cause_______.
A.
B.
C.
D.
91.  Pressure relief valves must never be __ .
A.
B.
C.
D.
92.  When pressurizing a refrigeration system with nitrogen, _____.
A.
B.
C.
D.
93.  Under EPA's regulations it is allowable to use __ to pressurize a R-11 system for the purpose of opening the system for a non-major repair.
A.
B.
C.
D.
94.  The EPA defines __ as maintenance, service, or repair that involves removal of the appliance's compressor, condenser, evaporator, or auxiliary heat exchanger oi1.
A.
B.
C.
D.
95.  The EPA defines a ____ as any appliance that is a motor vehicle air conditioner as defined in 40 CFR part 82, subpart B.
A.
B.
C.
D.
96.  The EPA defines __ as the reprocessing of refrigerant to at least the purity specified in ARI Standard 700, Specifications for Fluorocarbon Refrigerants, and to verify this purity using the analytical methodology prescribed in the Standard.
A.
B.
C.
D.
97.  When using recovery and recycling equipment manufactured AFTER November 15, 1993, technicians must evacuate an appliance containing LESS than 200 pounds of R-22 to __ of mercury vacuum before making a major repair.
A.
B.
C.
D.
98.  _______ can be used with R-22 to leak check hardware.
A.
B.
C.
D.
99.  Approved refrigerant recovery cylinders can be identified by ________.
A.
B.
C.
D.
100.  A major reason why a refrigerant tank should never be heated with an open flame is because it might __________ .
A.
B.
C.
D.
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