EPA FLASH CARDS.xlsx

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  1. Question
    Answer
  2. What type of refrigerant is chlorine free?
    HFC's
  3. Refrigerant migrates to the compressor crankcase because of a difference in ________ between the refrigerant and the oil
    Vapor pressure
  4. Which Refrigerant is an HCFC? A) R-124, B) R-134A, C) R410a, D) R-12, E) R-22
    E) R- 22
  5. Which Refrigerant is an HFC? A) R-124, B) R-134A, C) R410a, D) R-12, E) Both B and C
    E) Both B and C
  6. What factor(s) affects the speed of evacuation? A) the size of the equipment being evacuated, B) the ambient temperature, C) the amt of moisture in the system, D) All of the above
    D) All of the above
  7. Systems charged with R-134a should be leak checked with:
    Pressurized dry nitrogen
  8. HCFC refrigerants contain:
    Hydrogen, chlorine, fluorine, carbon
  9. Manifold gauge sets are often color coded, when this is done, the low pressure gauge is color coded:
    Blue
  10. After refrigerant liquid transfer between recovery unit and the system being emptied, you need to avoid trapping:
    Liquid refrigerant between service valves
  11. When can you use a disposable cylinder to recover refrigerant?
    Never
  12. CFC refrigerants are so named because they contain the elements:
    Chlorine, fluorine, carbon
  13. Recovery equipment that relies upon the compressor in the system would be considered:
    System-dependant
  14. The EPA requires the installation of a service aperture stub on all appliances using a class I or class II sustance as a refrigerant. The main purpose of this requirement is to make it easier to:
    Recover refrigerant
  15. When dealing with small systems, how many different refrigerants may be recovered in the same cylinder?
    Only one
  16. It is important not to mix different refrigerants in the same container because:
    The mixture may be impossible to reclaim
  17. Chlorofluorocarbons (CFC's) and hydrochlorofluorocarbons (HCFC's) have which of the following in common?
    They must be recovered before opening or disposing of appliances
  18. Refrigerant that is recovered can be returned to:
    The same system or other systems owned by the same person without restrictions
  19. An example of a HFC refrigerant is:
    R-134a
  20. When transporting cylinders containing used refrigerant, the DOT requires that you:
    Attach DOT classification tags
  21. Blended refrigerants leak from a system:
    In uneven amounts due to different vapor pressures
  22. Which type of refrigerant is the most harmful to stratospheric ozone?
    CFC
  23. Long hoses between the unit and the recovery machine should not be used because they cause: A) Excessive pressure drop, B) Increased recovery time, C) Increased emissions, D) All of the above
    D) All of the above
  24. If corrosion is found within the body of a relief valve, the valve must be:
    Replaced
  25. Disposable refrigerant containers are used for ______ refrigerant.
    Virgin
  26. Never use an open flame to heat a refrigerant tank because: A) it can result in venting refrigerant to the atmosphere, B) the tank may explode, causing serious injury to people nearby, C) refrigerant in the tank may decompose, forming a toxic material, D) All of the above
    D) All of the above
  27. If an oil is hygroscopic it means that it:
    Readily absorbs moisture
  28. The type of oil that is most commonly used in stationary refrigeration applications w/ HFC-134a refrigerant is:
    Ester oil
  29. Which type of refrigerant is the most harmful to stratospheric ozone?
    Refrigerants containing bromine
  30. Ozone depletion in the Stratosphere is what type of problem?
    Global
  31. Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be resold?
    ARI 700
  32. Under the EPA's " safe disposal requirements ", who is responsible of making sure that the refrigerant is removed from household refrigerators before they are disposed of:
    Final person in the disposal chain
  33. Ozone depletion potential, or "ODP," is:
    A measure of the ability of CFCs' and HCFCs' to destroy ozone
  34. _______ is the process of removing refrigerant in any condition from a system and storing it in a container without necessarily testing or processing it in any way.
    Recovering
  35. The EPA can require a technician to demonstrate their ability to perform proper procedures for recovering and/or recycling refrigerant. Failure to demonstrate competency can result in:
    Revocation of the technician's certification
  36. Never use oxygen or compressed air to pressurize a system because:
    When mixed with compressor oil or some refrigerants, it could explode
  37. Which of the following is an approved "drop-in" service replacement for R-12? HFC-134a, HFC-410a, R-407c, according to the EPA there are no "drop-in" replacements.
    According to the EPA there are no "drop-in" replacements
  38. The synthetic lubricant presently used with ternary blends containing HCFCs is:
    Alkybenzene
  39. On a typical three port ( three hose) manifold gauge, the center port is used for:
    Recovery, evacuation and charging
  40. What refrigerant type has the highest ozone depletion potential?  A) HCFCs, B) HFCs, C) CFCs
    C) CFCs
  41. What refrigerant has the lowest ozone depletion potential? A) R-22, B) R-11, C) R-12, D) R-113
    A) R-22
  42. Which refrigerants must be recovered before opening a system or disposing of a system?
    All refrigerants must be recovered
  43. When dehydrating a system, the system can be heated to:
    Decrease the dehydration time
  44. Use _______ to remove ice from the sight glass.
    An alcohol spray
  45. What atom of the CFC molecule causes ozone depletion?
    Chlorine
  46. Refrigerant vapors or mist should not be inhaled because:
    They may cause heart irregularities and/or unconsiousness
  47. The high pressure gauge on service manifold sets has a continuous scale, usually calibrated to read from:
    0-500psi
  48. P.P.E.'s (gloves, safety glasses, safety shoes, etc.) should always be worn is when:
    Handling and filling cylinders
  49. "Self-contained" recovery devices:
    Can capture liquid and/or vapor refrigerant without the assistance of components in the air-conditioning or refrigeration equipment
  50. It is necessary to place a refrigerant label on:
    A refrigerant cylinder which is being returned for reclaiming
  51. Before you dispose of any system containing a refrigerant, you must:
    Recover the refrigerant
  52. Refrigerant leaves the condenser of an operating system as a:
    High pressure liquid
  53. Non-Azeotropic refrigerants leak from a system:
    In uneven amounts due to different vapor pressures
  54. Whe using nitrogen to pressurize a system, you should always:
    Charge through a pressure regulator
  55. All recovery equipment currently being made is required to have:
    An EPA approved certification label
  56. The color code for approved refrigerant recovery cylinders is:
    Yellow tops and gray bodies
  57. All devices used for refrigerant recovery must:
    Meet EPA standards
  58. Which of the following gases help form the earth's protective shield? chlorine, chlorides, carbon monoxide, stratosphere ozone
    Stratosphere ozone
  59. Refrigerant cylinders should always be: A) Free of rust and damage, B) Color coded to indicate the contents, C) Secure, D) All of the above
    D) All of the above
  60. It is illegal to:
    Knowingly release any refrigerant during the service, maintenance, repair or disposal of appliances, with the exception of de minimis releases
  61. When using nitrogen in a system, when is it a violation of the EPA prohibition on venting?
    Release of mixtures of nitrogen and refrigerant that result from adding nitrogen to a fully charged appliance to "leak-check" the appliance
  62. An award of up to what amount may be paid to a person supplying information that leads to a penalty against the technician who is intentionally venting?
    $10,000
  63. Ester based oils can be mixed with:
    No other oils
  64. Recycling and recovery equipment intended for use with air-conditioning and refrigeration equipment (except for small appliances) must be tested under:
    ARI 740
  65. A compound pressure gauge, typically used on the low side of the system, measures pressure in:
    Psig and inches of mercury
  66. Which of the following human health effects could result from an increase in ultraviolet radiation?
    An increase in cataracts cases
  67. When a system will not hold a vacuum after it has been evacuated, then:
    The system may be leaking
  68. You can determine safe pressure for leak testing a system from the:
    Low-side test-pressure data-plate value
  69. Systems charged with R-410a should be leak checked with:
    Pressurized nitrogen
  70. Which chemicals are controlled by the Montreal Protocol? A) Chlorofluorocarbons, B) Hydrochlorofluorocarbons, C) Halons, D) All of the above
    D) All of the above
  71. After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from:
    Recovery and recycling
  72. A ternary refrigerant blend is a ____ part mixture. two, three, four or five
    Three 
  73. Reusable refrigerant containers that are normally under any pressure above 15 psig, must be hydrostatically tested and date stamped every:  A) 1yr, B) 2yr, C) 3yr, D) 5yr
    D) 5 years
  74. Refrigerant recovery during low ambient temperatures will:
    Slow the recovery process
  75. What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds containing chlorine?
    Refrigerants that contain chlorine but not hydrogen are so stable that they do not break down in the lower atmosphere after being released. The chlorine or bromine reacts with ozone, causing it to change back to oxygen, thus destroying the ozone layer.
  76. A system is dehydrated to:
    Remove water and water vapor
  77. What refrigerant listed is a "low-pressure refrigerant" under EPA's refrigerant recycling regulations?  A) R-22, B) R-123, C) R-134a, D) R-500
    B) R-123
  78. Which of the following is a "high-pressure refrigerant" under EPA's refrigerant recycling regulations?  A) R-11, B) R-22, C) R-113, D) R-123
    B) R-22
  79. When dealing with small systems, how many different refrigerants may be recovered into the same cylinder?
    Only one
  80. The evacuation of a system is a method of:
    Dehydration
  81. This chemical was found in the upper stratosphere and that indicates that the ozone layer is being destroyed.  A) Chlorine monoxide, B) Carbon monoxide, C) Carbon dioxide, D) Nitrogen dioxide
    A) Chlorine monoxide
  82. Which refrigerant contains a CFC?  A) R-12, B) R-22, C) R-134a, D) R-410a
    A) R-12
  83. According to the EPA, of the refrigerants listed below, which types of refrigerants will not contribute to global warming?  A) CFCs, B) HCFCs, C) HFCs, D) They all contribute to global warming
    D) They all contribute to global warming
  84. According to the EPA, an oil sample should be taken for which of the following reasons? A) A new filter-drier has been installed, B) The system had a leak or a major component failure, C) System not cooling properly, D) Recycled refrigerant was added to the system
    B) The system had a leak or a major component failure
  85. A refillable refrigerant cylinder must never be filled to more than _______ of its capacity by weight:
    80%
  86. Which of the following is a "very high-pressure refrigerant" under EPA's refrigerant recycling regulations?  A) R-22, B) R-134a, C) R-13, D) R-500
    C) R-13
  87. In a vapor compression refrigeration system, cooling occurs when:
    Refrigerant liquid turns to a vapor
  88. What statement is true about an azeotropic refrigerant mixture? A) It is always made from just two components, B) It has a pressure-temperature curve identical to one of its components, C) It is a mixture that is always made from at least three component refrigerants, D) It is a mixture that acts like a single-component refrigerant over its entire range.
    D) It is a mixture that acts like a single-component refrigerant over its entire range
  89. What is one of the most serious results of damage to the ozone layer?
    Increase in human skin cancer
  90. When moisture exists in an operating system, which of the following is the most likely to occur? A) Copper tubes and fittings will rust, B) Compressor discharge valves will freeze up, C) Acid will form, D) Compressor head pressures will rise
    C) Acid will form
  91. Each chlorine atom in the stratosphere ca destroy ______ ozone molecules.
    100,000
  92. State and local governments can make state laws that: A) Follow the clean air act/EPA regulations, B) Contain stricter regulations than the clean air act/EPA regulations, C) Both A and B
    C) Both A and B
  93. It is important not to mix R-22 and R-410a refrigerants in the same container because:
    The mixture may be impossible to reclaim
  94. The term used to describe the fact that a refrigerant blend has a range of boiling or condensing points at a constant pressure is:
    Temperature glide
  95. To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least:
    0 psig
  96. What is the best proof that CFCs are in the stratosphere?
    Measurement of CFCs in air samples from stratosphere
  97. During servicing of a refrigeration system containing R-22, the refrigerant must be:
    Recovered
  98. Which of the following statements would be considered good service practices for conserving refrigerant? A) Recover or recycle refrigerant, B) Keep systems tight, C) Find and repair leaks, D) All of the above
    D) All of the above
  99. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources such as volcanoes because: A) The rise in the amount of chlorine in the stratosphere matches the rise in the amount of fluorine, which has different natural sources than chlorine, B) The rise in the amount of chlorine in the stratosphere matches the rise in CFC emissions, C) Air samples taken from the stratosphere over erupting volcanoes shows that the volcanoes contribute a small quantity of chlorine to the stratosphere when compared to CFC's, D) All of the above
    D) All of the above
  100. It has been illegal to vent substitutes for CFC and HCFC refrigerants since:
    Nov-95
  101. According to ASHRAE's 1992 refrigerant safety classification, which of the following designations would be the most safe? A) A-1, B) A-3, C) B-1, D) B-3
    A) A-1
  102. In general, blended refrigerants should be charge:
    As a liquid
  103. Equipment covered by EPA regulations include:
    All air-conditioning and refrigeration equipment using CFC, HCFC of HFC refrigerants
  104. Which atom of the CFC molecule causes ozone depletion? fluorine, chlorine, sodium, helium
    Chlorine
  105. The proper method of discarding a disposable refrigerant cylinder is to:
    Assure that all refrigerant is recovered and that the cylinder is rendered useless, then recycle the metal
  106. A hermetic compressor must never be operated when:
    There is a dehydration vacuum in the system
  107. Of the items listed below, which is (are) violation(s) of the clean air act? A) Falsifying or failing to keep required records, B) Failing to reach required evacuation levels before opening or disposing of appliances, C) Knowingly releasing CFC or HCFC refrigerants or their substitutes while preparing appliances, D) All of the above
    D) All of the above
  108. When evacuating a system, the hoses should be:
    As short in length and as large in diameter as possible
  109. To obtain an accurate vacuum readings during system evacuation, the system vacuum gauge should be located:
    As far from the vacuum pump as possible
  110. Refrigerant that enters the expansion or throttling device (also known as the metering device) is a: A) Saturated vapor, B) Superheated vapor, C) Mixture of vapor and liquid, D) Liquid
    D) Liquid
  111. Even though R-22 is considered non-toxic, it: A) Is lighter than air, B) Can cause asphyxia, C) Is a class I refrigerant, D) Can be detected by its color
    B) Can cause asphyxia
  112. R-410A is not a typical blended refrigerant because:  A) It is a near azeotropic refrigerant., B) It can be charged as either a liquid or vapor, C) While it has a 400 series refrigerant number it behaves like a 500 series refrigerant, D) All of the above are true
    D) All of the above are true
  113. Never overfill refrigerant storage cylinders because:
    The internal pressure of the cylinders may rise in heated areas and cause an explosion
  114. Of the refrigerants listed below, which has the lowest ozone depletion potential?  A) R-22, B) R-11, C) R-12, D) R-113
    A) R-22
  115. Which refrigerant contains a CFC? A) R-500, B) R-410A, C) R-134A, D) R123
    A) R-500
  116. Which refrigerant is an HCFC?  A) R-123, B) R-134A, C) R-410A, D) R-12
    A) R-123
  117. Of the refrigerants listed, which has the lowest ozone depletion potential? A) R-22, B) R-123, C) R-134A, D) R-502
    C) R-134A
  118. "Self-contained" recovery devices:
    Can capture liquid and/or vapor refrigerant without the assistance of components in the air-conditioning or refrigeration equipment
  119. The Montreal Protocol is:
    Atreaty among nations that controls production of CFCs and HCFCs
  120. What gas(es) would cause the least damage to the environment during a leak check? A) Dry nitrogen and R-22, B) Dry nitrogen and R-12, C) Compressed air and R-12, D) Dry nitrogen
    D) Dry nitrogen
  121. According to the EPA, a _______ leak detection method is considered to be the most effective for locating the general area of a small leak.
    Electronic or ultrasonic tester
  122. Measuring the system's final vacuum is always done with:
    The system isolated and the vacuum pump heated
  123. Which safety precaution(s) should always be followed: A) Never apply an open flame to a refrigerant cylinder, B) Never cut or weld any refrigerant line when refrigerant is in the line, C) Never use oxygen to purge lines or to pressurize a system, D) All of the above
    D) All of the above
  124. If a technician has a system where some R-502 was added to an R-22 system. The technician should:
    Recover all the refrigerant into a separate tank
  125. What refrigerant(s) must be recovered before opening a system or disposing of a system?
    All refrigerants must be recovered
  126. During servicing of a refrigeration system containing R-12, the refrigerant must be: 
    Recovered
  127. Refrigerant that enters the compressor, under normal operating conditions, is a:
    Low pressure vapor
  128. According to the EPA, when dealing with customer complaints regarding additional costs due to refrigerant recovery efforts, the technician should: A) Explain that refrigerant recovery is necessary to protect human health and the environment, B) Explain that refrigerant recovery is required by federal (and in some cases state and local) laws, C) Inform the customer that professional service personnel are duty bound to follow the law and to protect the environment, D) All of the above
    D) All of the above
  129. Refrigerant entering the compressor of a refrigeration system is a:
    Superheated vapor
  130. According to EPA regulations, which of the following procedures is not an approved technique for system cleanup after a burnout? A) Installing a suction-line filter-drier, B) Flushing with liquid refrigerant to clean tubing, C) Triple evacuation or deep vacuum evacuation
    B) Flushing with liquid refrigerant to clean tubing

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Author:
Anonymous
ID:
328526
Filename:
EPA FLASH CARDS.xlsx
Updated:
2017-02-15 19:50:58
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EPA 608
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EPA 608 Flash cards
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