EPA 608 Core Exam Questions with Verified Answers., Exams of Nursing

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Refrigeration technicians who violate the clean air act can: A. lose their epa certification B. be fined. C. be required to appear in federal court D. all of the above - Correct Answers all of the above It has been illegal to vent substitutes for CFC and HCFC refrigerants since: - Correct Answers November 1995 which refrigerant has the lowest odp? R22, R11, R12, R113 - Correct Answers R 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 is to ________. - Correct Answers recover

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Does the EPA recognize any refrigerant "drop-in" replacements? - Correct Answers no Do low ambient temperatures slow or speed up the process of refrigerant recovery? - Correct Answers slow Chemical composition of R-124 - Correct Answers hcfc The term used to describe the fact that a refrigerant blend has a range of boiling or condensing points at a constant pressure is ________ _________. - Correct Answers temperature glide What is the best proof that there are CFCs in the atmosphere? Is it the measurement of: A. CFCs in smog B. other man-made compounds in air samples from the stratosphere?

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C. CFCs in air samples from the atmosphere - Correct Answers CFCs in air samples from the atmosphere According to the EPA, which of the following do NOT contribute to global warming? CFC, HCFC, HFC? - Correct Answers all contribute Even though R-22 is considered non-toxic, it: A. is lighter than air B. can cause asphyxia C. is a class 1 refrigerant D. can be detected by its color - Correct Answers can cause asphyxia CFCs will no longer be manufactured or imported into the U.S. after what year? - Correct Answers 1995 A system is dehydrated to remove water and _____ ______. - Correct Answers water vapor

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Which of the following refrigerants contains a CFC: R500, R410A, R134A, OR R123? - Correct Answers R The EPA's definition of a, type 1, small appliance, is a device that contains a factory charge of _____ lbs or less and is hermetically sealed at the factory. - Correct Answers 5 The EPA regulation requires any person who opens an appliance for maintenance to have at least one self-contained recovery machine available. The only exception: _____ _____ - Correct Answers small appliances At high temperatures, R-12 and R-22 can decompose to form: ______ _______. - Correct Answers Phosgene gas

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The EPA recommends, for safety, goggles when working with compressed gas, and _________ when working with refrigerant. - Correct Answers respirator When it comes to schrader valves, inspecting, replacing damaged valves, and capping service ports is considered ______. - Correct Answers critical The EPA believes that the most effective leak detection method is: __________ or ___________. - Correct Answers electronic ultrasonic The chemical composition of R-134A is: - Correct Answers hfc An HFC refrigerant considered non-typical because it is a near azeotropic, can charge either as a liquid or a vapor, and has a 400 series number, even though it behaves like a 500 series refrigerant is: - Correct Answers R410A

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Chemical composition of R-11 - Correct Answers cfc Chemical composition of R-12 - Correct Answers cfc Chemical composition of R-500 - Correct Answers cfc Chemical composition of R-22 - Correct Answers hcfc Chemical composition of R-123 - Correct Answers hcfc Since this date, a person may not service, maintain, or dispose of appliances designed to contain refrigerants without being appropriately certified. - Correct Answers november 14 1994 Since this date, only certified technicians may purchase refrigerants. The smallest cylinder a 608-certified technician may purchase is 20

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pounds. Only a 609-certified (automotive) technician may purchase smaller containers. - Correct Answers november 14 1994 The purpose of the CAA is to limit how much of a _________ can be in the air anywhere in the U.S. - Correct Answers pollutant It is a violation of the CAA not to keep records. Technicians must provide an invoice to customers stating how much refrigerant was added when the system operates on _____ pounds or more. - Correct Answers 50 The earth's security blanket is the stratosphere, which is located between 10 and _______ miles above sea level. - Correct Answers 30 An Ozone molecule consists of _____ oxygen atoms. - Correct Answers 3

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Ozone protects us from harmful ultraviolet radiation and helps maintain stable Earth temperatures. Its depletion causes: crop loss, increase in eye diseases, skin cancer, reduced marine life, deforestation, and ___________. - Correct Answers increased ground level ozone Ozone protects us from harmful ultraviolet radiation and helps maintain stable Earth temperatures. Its depletion causes: crop loss, increase in eye diseases, skin cancer, reduced marine life, ______, and increased ground level ozone. - Correct Answers deforestation Ozone protects us from harmful ultraviolet radiation and helps maintain stable Earth temperatures. Its depletion causes: crop loss, increase in eye diseases, skin cancer, ________, deforestation, and increased ground level ozone. - Correct Answers reduced marine life Ozone protects us from harmful ultraviolet radiation and helps maintain stable Earth temperatures. Its depletion causes: crop loss, increase in eye diseases, _______, reduced marine life, deforestation, and increased ground level ozone. - Correct Answers skin cancer

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Ozone protects us from harmful ultraviolet radiation and helps maintain stable Earth temperatures. Its depletion causes: crop loss, ________, skin cancer, reduced marine life, deforestation, and increased ground level ozone. - Correct Answers increase in eye diseases Ozone protects us from harmful ultraviolet radiation and helps maintain stable Earth temperatures. Its depletion causes: _______, increase in eye diseases, skin cancer, reduced marine life, deforestation, and increased ground level ozone. - Correct Answers crop loss When a chlorine atom meets with an Ozone molecule, it takes one Oxygen atom from the Ozone, forming a compound known as ______ ______. - Correct Answers chlorine monoxide When Ozone (O3) loses an atom to a chlorine atom and chlorine monoxide is formed, what remains of the Ozone becomes:___________

• Correct Answers o

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Chlorine monoxide molecules collide with Ozone molecules and release the oxygen atom so that the two form __ ___ _______. - Correct Answers 2 o2 molecules When chlorine monoxide and Ozone join and form two O2 molecules the _______ atom is left free to attack another Ozone molecule. - Correct Answers chlorine A single Chlorine atom can destroy _____ thousand Ozone molecules. - Correct Answers 100 The chlorine in CFCs will neither dissolve in water nor break down into compounds that DO dissolve in water, so they do not ______ out of the atmosphere. - Correct Answers rain ODP is a measurement of CFCs and HCFCs ability to destroy Ozone. The letters stand for _____ _____ _____. - Correct Answers ozone depletion potential

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______ have the highest ODP. - Correct Answers CFCs ______ do not contain chlorine and have no ODP. - Correct Answers HFCs Who regulates section 608 of the Federal Clean Air Act? - Correct Answers EPA Failure to comply with section 608 could cost a company a daily fine, per day, per violation. How much? - Correct Answers 27, There is a reward for those who turn in technicians who violate section

608. How much? - Correct Answers 10, Service technicians who violate the Clean Air Act may be _____, lose their certification, may be required to appear in Federal court. - Correct Answers fined

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Service technicians who violate the Clean Air Act may be fined,_____ ______, may be required to appear in Federal court. - Correct Answers lose certification Service technicians who violate the Clean Air Act may be fined, lose their certification, may be required to ______. - Correct Answers appear in federal court The EPA may require a technician to _______ the ability to properly perform refrigerant recovery/recycling procedures. - Correct Answers demonstrate Failing to properly demonstrate recovery and recycling skills if asked by the EPA to do so, can result in ________ of certification. - Correct Answers revocation

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It has been illegal to vent CFCs or HCFCs since this date. - Correct Answers july 1 1992 It has been illegal to vent HFCs since this date. - Correct Answers november 15 1995 Technicians are required to have a recovery device which is approved by the _____ - Correct Answers EPA Recovery devices must be equipped with _____ _____ fittings. - Correct Answers low loss Recovery devices must be ________ with the EPA - Correct Answers registered In order to dispose of a disposable cylinder, a technician must render it useless and recycle the metal. Step one is to recover remaining refrigerant to what pressure? - Correct Answers 0 psig

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CFCs were phased out of production on this date. - Correct Answers december 31 1995 Future supplies of CFCs will come from recovered, recycled, or reclaimed refrigerants after _____ supplies are depleted. - Correct Answers virgin To clean refrigerant for reuse by separating the oil from the refrigerant and removing moisture from it by passing it through one or more filter driers is to _________. - Correct Answers recycle to process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis so that it meets the standard set forth in ARI 700 before resale, is to ___________. - Correct Answers reclaim

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Recovery equipment sold after this date must be certified and labeled by an EPA approved equipment testing organization in order to meet EPA standards. - Correct Answers november 15 1993 recovery device which captures refrigerant with the assistance of components in the appliance from which the refrigerant is being recovered. - Correct Answers system dependent recovery device which has its own means to draw the refrigerant out of the appliance. - Correct Answers self contained R134A is a leading candidate for CFC R12 retrofit. R134A will not mix with most refrigerant oils. The oil in these systems is an ________. - Correct Answers ester Some refrigerant blends are called Ternary, meaning they are a three- part blend. Ternary blends are used with a synthetic lubricant called _________. - Correct Answers Alkylbenzene

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Following retrofit procedures, R134A can be used as a substitute in most _______ systems. - Correct Answers R Most refrigerant oils readily absorb water. Oils that have this high affinity for water are called _______. - Correct Answers hygroscopic An ________ sample should be taken and analyzed if a system has had a major component failure. - Correct Answers oil Due to different vapor pressures, the components of a blended refrigerant will leak at ________ rates. - Correct Answers uneven Blended refrigerants should be charged as a ______. - Correct Answers liquid The proper charging method for blended refrigerants is to weigh into the ________ side of the system. - Correct Answers high

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A _________ mixture acts like a single component refrigerant over its entire temperature/pressure range and does not have a temperature glide. - Correct Answers azeotropic It is important not to mix refrigerants in the same tank because the mixture may be impossible to _______. - Correct Answers reclaim A system that experienced a compressor burn-out may have ______ oil.

• Correct Answers contaminated Replacing a compressor after a burn out, it is a good idea to install a filter drier on the ______ ______. - Correct Answers suction line ________ recovery hoses will cause excessive pressure drop, increased recovery time, and a potential for increased emissions. - Correct Answers long

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After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration system, you should guard against trapping liquid refrigerant between ____ ____. - Correct Answers service valves After using an electronic or ultrasonic leak detector to determine the general area of a leak, the use of _____ ______ will pinpoint the leak. - Correct Answers soap bubbles Two kinds of acids may form in a system where moisture is allowed to remain. They are _______ and ______. - Correct Answers hydrochloric hydrofluoric The over-evacuation of a system is _______. - Correct Answers impossible When evacuating a system, the hose connected to the pump should be as short as possible and as large in ______ as possible. - Correct Answers diameter

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When evacuating a system the vacuum gauge should be connected as ______ as possible from the vacuum pump. - Correct Answers far Measuring a system's vacuum should be done with the system isolated and the vacuum pump turned _____. - Correct Answers off Heating a refrigeration system will _______ dehydration time. - Correct Answers decrease A system that will not hold a vacuum probably has a ____. - Correct Answers leak When can disposable cylinders be used for recovery? - Correct Answers never Recovery cylinders have two ports: one liquid and one______. - Correct Answers vapor

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Recovery cylinders have a gray body and a ______ top. - Correct Answers yellow Overfilling or heating recovery cylinders may cause an ______. - Correct Answers explosion For safety, a recovery cylinder must never be filled above ______ percent of its capacity. - Correct Answers 80 The _______ filling of recovery cylinders can be controlled by either mechanical float devices, electronic shut-off, or weight. - Correct Answers safe Refillable cylinders must be hydrostatically tested and date stamped every _____ years. - Correct Answers 5

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Refillable cylinders used for transporting recovered pressurized refrigerant must be ______ approved. - Correct Answers DOT Recovery cylinders should be inspected for _____. - Correct Answers rust A recovery cylinder that shows signs of rust or appears to not be secure, should be reduced to this pressure before discarding. - Correct Answers 0 psig When pressurizing a system with nitrogen, you should always charge through a pressure regulator and insert a _____ _____ downstream from the regulator - Correct Answers relief valve Relief valves, on a nitrogen tank, must NEVER be installed in _________.

• Correct Answers series

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When leak testing a system, never pressurize the system with _______ or compressed air. - Correct Answers oxygen When mixed with refrigerants, oxygen or compressed air can cause an ____________. - Correct Answers explosion To determine the safe pressure for leak testing, check the ______ ______ for the low-side test pressure value. - Correct Answers data plate Refrigerants can cause suffocation because they are heavier than air and displace oxygen. Inhaling the vapors or mist may cause heart irregularities, unconsciousness, and oxygen deprivation (asphyxia) leading to _______. - Correct Answers death Before shipping any used refrigerant cylinders, one must check that each one meets ______ _____. - Correct Answers DOT standards

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To ship refrigerant cylinders, techs must complete the shipping paperwork, including the number of cylinders of each refrigerant, and properly label the cylinder with the type and amount of refrigerant. Each one must be marked with a DOT classification ______ indicating it is a 2.2 non-flammable gas. - Correct Answers tag Refrigerant cylinders must be transported in an ______ position. - Correct Answers upright Individual states may have their own _______ procedures, so a tech must check with the DOT in his state. - Correct Answers shipping