EPA 608 Core Quiz English


1. Refrigeration technicians who violate the Clean Air Act can:




2. After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from:




3. Refrigerant that is recovered can be returned to:




4. Refrigerant can not be called "reclaimed" unless it:




5. 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:




6. What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds containing chlorine?




7. A system is considered dehydrated when:




8. Disposable refrigerant containers are used for _______ refrigerant.




9. Which refrigerant is an HCFC?




10. What statement is true about an azeotropic refrigerant mixture?




11. Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in common?




12. To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least:




13. Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded:




14. In general, blended refrigerants should be charged:




15. Blended refrigerants leak from a system:




16. Which of the following gases help form the earth's protective shield?




17. In a refrigeration system, the device that changes a low pressure vapor to a high pressure vapor is the:




18. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources such as volcanoes because:




19. Which atom of the CFC molecule causes ozone depletion?




20. The ozone layer protects the earth from:




21. When using with any solvent, cleaner, chemical or refrigerant, you should review:




22. An award of up to what amount may be paid to a person supplying information that leads to a penalty against a technician who is intentionally venting?




23. The Montreal Protocol is:




24. Which refrigerant is an HCFC?




25. What is one of the most serious results of damage to the ozone layer?




26. Of the refrigerants listed below, which has the lowest ozone depletion potential?




27. To determine the maximum allowable pressure to use when checking a system, check:




28. Ozone depletion potential, or "ODP," is:




29. An example of an HFC refrigerant is:




30. Whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most importance in consideration of safety?




31. During servicing of a refrigeration system containing R-12, the refrigerant must be:




32. Which safety precaution(s) should always be followed:




33. In a vapor compression refrigeration system, cooling occurs when:




34. The evacuation of a system is a method of:




35. Each chlorine atom in the stratosphere can destroy ____ ozone molecules.




36. An example of a HFC refrigerant is:




37. Which gas(es) would cause the LEAST damage to the environment during a leak check?




38. Refrigerant migrates to the compressor crankcase because of a difference in __________ between the refrigerant and the oil.




39. Which refrigerant is an HCFC?




40. It is important not to mix R-22 and R-410A refrigerants in the same container because:




41. When using recovery unit, the fill level of the recovery tank can be controlled by:




42. Which of the following refrigerant releases is a violation of the EPA prohibition on venting?




43. Which of the following human health effects could result from an increase in ultraviolet radiation?




44. Never use an open flame to heat a refrigerant tank because:




45. When transporting cylinders containing used refrigerant, the DOT requires that you:




46. According to ASHRAE's 1992 refrigerant safety classification, which of the following designations would be the most safe?




47. The over-evacuation of a system:




48. Equipment covered by EPA regulations include:




49. Never overfill refrigerant storage cylinders because:




50. It is important not to mix different refrigerants in the same container because:




51. Manifold gauge sets are often color coded, when this is done, the low pressure gauge is color coded:




52. All devices used for refrigerant recovery must:




53. Reusable refrigerant containers that are normally under any pressure above 15 psig, must be hydrostatically tested and date stamped every:




54. Which refrigerant(s) must be recovered before opening a system or disposing of a system?




55. To obtain an accurate vacuum readings during system evacuation, the system vacuum gauge should be located:




56. What is the best proof that CFCs are in the stratosphere?




57. The recovery of refrigerants is necessary to:




58. An example of an HFC refrigerant is:




59. A compound pressure gauge, typically used on the low side of the system, measures pressure in:




60. _____________ refers to the process of cleaning refrigerant by oil separation and single or multiple passes through filter-driers, which reduce moisture and acidity?




61. The high pressure gauge on service manifold sets has a continuous scale, usually calibrated to read from:




62. ________ is the process that returns refrigerant to new-product specifications and that requires chemical analysis?




63. A cylinder with a gray body and a yellow top indicates that the cylinder is designed to hold:




64. HCFC refrigerants:




65. Which type of refrigerant is the most harmful to stratospheric ozone?




66. According to the EPA, a _________ leak detection methods is considered to be the most effective for locating the general area of a small leak.




67. Long hoses between the unit and the recovery machine should not be used because they cause:




68. Recovery equipment that relies upon the compressor in the system would be considered:




69. A hermetic compressor must never be operated when:




70. "Self-contained" recovery devices:




71. Systems charged with R-410A should be leak checked with:




72. R-410A is not a typical blended refrigerant because:




73. A ternary refrigerant blend is a ____ part mixture.




74. In a refrigeration system, high pressure vapor is converted to high pressure liquid in the:




75. Which of the following is an approved "drop-in" service replacement for R-12?




76. The proper method of discarding a disposable refrigerant cylinder is to:




77. CFC refrigerants are so named because they contain the elements:




78. Before you dispose of any system containing a refrigerant, you must:




79. According to EPA regulations, which of the following is procedures is not an approved technique for system cleanup after a burnout?




80. When using nitrogen to pressurize a system, you should always:




81. What effects can ozone depletion have on the environment?




82. Non-Azeotropic refrigerants leak from a system:




83. An example of an HCFC refrigerant is:




84. Which chemicals are controlled by the Montreal Protocol?




85. Systems charged with R-134a should be leak checked with:




86. When evacuating a system, the hoses should be:




87. It has been illegal to vent substitutes for CFC and HCFC refrigerants since:




88. Never use oxygen or compressed air to pressurize a system because:




89. Refrigerant cylinders should always be:




90. Even though R-22 is considered non-toxic, it:




91. A system is dehydrated to:




92. According to the EPA, of the refrigerants listed below, which types of refrigerants will not contribute to Global Warming?




93. The type of oil that is most commonly used in stationary air conditioning applications with HFC-410A refrigerant is:




94. Technicians receiving a passing grade on the Type II (medium-pressure, high-pressure and very high pressure) exam are certified to recover refrigerant during the maintenance, service, or repair of medium- and high-pressure equipment and very high pressure refrigerants, including:




95. Personal protective equipment (gloves, safety glasses, safety shoes, etc.) should always be worn is when:




96. Refrigerant vapors or mist should not be inhaled because:




97. Of the items listed below, which is (are) violation(s) of the Clean Air Act?




98. HFC refrigerants contain:




99. Which refrigerant contains an HCFC?




100. Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be considered:




101. Refrigerant that enters the compressor, under normal operating conditions, is a:




102. It is necessary to place a refrigerant label on:




103. Which refrigerant contains a CFC?




104. Use __________ to remove ice from a sight glass.




105. According to the EPA, an oil sample should be taken for which of the following reasons?




106. The EPA requires the installation of a service aperture or process stub on all appliances using a class I or class II substance as a refrigerant. The main purpose of this requirement is to make it easier to:




107. Recycling and recovery equipment intended for use with air-conditioning and refrigeration equipment (except for small appliances) must be tested under:




108. Refrigerant entering the compressor of a refrigeration system is a:




109. What is being done in the U.S. to stop damage to the stratospheric ozone layer?




110. The type of oil that is most commonly used in stationary refrigeration applications with HFC-134a refrigerant is:




111. The term used to describe the fact that a refrigerant blend has a range of boiling or condensing points at a constant pressure is:




112. Which refrigerant contains a CFC?




113. Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be resold?




114. An example of a HFC refrigerant is:




115. It is illegal to:




116. Which type of refrigerant is the most harmful to stratospheric ozone?




117. Refrigerant that enters the expansion or throttling device (also known as the metering device)is a:




118. Which of the following statements would be considered good service practices for conserving refrigerant?




119. Under the EPA "safe disposal requirements", the person responsible for making sure that the refrigerant has been removed from household refrigerators before they are disposed of is the:




120. Which refrigerant listed below is a "low-pressure refrigerant" under EPA's refrigerant recycling regulations?




121. When moisture exists in an operating system, which of the following is the most likely to occur?




122. Which of the following is a "very high-pressure refrigerant" under EPA's refrigerant recycling regulations?




123. When using nitrogen to pressurize a system, you should:




124. Of the refrigerants listed below, which has the lowest ozone depletion potential?




125. We dealing with small systems, how many different refrigerants may be recovered into the same cylinder?




126. When operating refrigerant recovery or recycling equipment, the following precautions should always be followed.




127. Of the refrigerants listed below, which types of refrigerants will not damage stratospheric ozone?




128. When evacuating a system, the hoses should be:




129. Refrigerant leaves the condenser of an operating system as a:




130. If corrosion is found within the body of a relief valve, the valve must be:




131. The Clean Air Act:




132. Measuring the system's final vacuum is always done with:




133. A refillable refrigerant cylinder must never be filled to more than ________ of its capacity by weight:




134. Of the refrigerants listed below, which refrigerant type have the highest ozone depletion potential?




135. This chemical was found in the upper stratosphere and that indicates that the ozone layer is being destroyed.




136. What factor(s) affects the speed of evacuation?




137. HCFC refrigerants contain:




138. When a system will not hold a vacuum after it has been evacuated, then:




139. All recovery equipment currently being made is required to have:




140. The color code for approved refrigerant recovery cylinders is ____________.




141. When can you use a disposable cylinder to recover refrigerant?




142. Which of the following is a "high-pressure refrigerant" under EPA's refrigerant recycling regulations?




143. After refrigerant liquid transfer between recovery unit and the system being emptied, you need to avoid trapping:




144. You can determine safe pressure for leak testing a system from the:




145. If a technician has a system where some R-502 was added to an R-22 system. The technician should:




146. Ozone in the stratosphere above the earth consists of:




147. The size (capacity) of the vacuum pump and the size of the suction line used will determine:




148. According to the EPA, when dealing with customer complaints regarding additional costs due to refrigerant recovery efforts, the technician should:




149. State and local governments can make state laws that:




150. If an oil is hygroscopic it means that it:




151. When dehydrating a system, the system can be heated to:




152. The synthetic lubricant presently used with ternary blends containing HCFCs is:




153. Ozone depletion in the stratosphere is what type of problem?




154. On a typical three port (three hose) manifold gauge, the center port is used for:




155. Ester based oils can be mixed with:




156. CFCs will no longer be manufactured or imported into the United States after:




157. Which type of refrigerants are chlorine-free?




158. Refrigerant recovery during low ambient temperatures will:




159. ________ is the process of removing refrigerant in any condition from a system and storing it in an external container without necessarily testing or processing it in any way.




160. Containers designated "refillable" by DOT are used for transporting recovered pressurized refrigerant _________.




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