EPA 608 Core (2023) correctly answered!

EPA 608 Core (2023) correctly answered! Where is the stratosphere? 10 to 30 miles Where is ozone located? stratosphere What does an ozone molecule consist of? 3 oxygen atoms The ozone layer protects us from... ultraviolet radiation The ozone layer helps to maintain... stable earth temperatures Depletion of ozone causes... crop loss, eye disease, skin cancer, reduced marine life, deforestation, increased ground level ozone. What type of refrigerants, when released into the atmosphere, cause ozone depletion? cfcs and hcfcs What in refrigerants causes ozone depletion? chlorine What compound is formed when chlorine meets ozone? chlorine monoxide How many ozone molecules can be destroyed by one chlorine atom? 100,000 The rise in the amount of chlorine measured in the stratosphere over the past twenty years matches the rise in... flourine The chlorine in CFCs will break down in water(true/false). false The chlorine in CFCs will break down into compounds that will dissolve in water(true/false). false What does ODP stand for? ozone depletion potential HFCs have a higher ODP than CFCs (true/false). false Which refrigerant type has no ODP? HFCs What chemicals make up CFCs? chlorine flourine carbon What chemicals make up HCFCs? hydrogen chlorine fluorine carbon What chemicals make up HFCs? hydrogen fluorine carbon Give examples of CFCs? r-11, 12, 500 Give examples of HCFCs? r-22, 123 Give examples of HFCs? r-134a Who regulates section 608 of the clean air act? epa How much is the fine for releasing refrigerant into the atmosphere? 27,500 per day per violation. What is the bounty for turning someone in? up to 10,000 Who gets fined? you and your company Can the EPA require you to demonstrate the ability to properly perform refrigerant recovery/recycling duties? yes What can happen if you cannot properly perform recovery/recycling? revocation of certification To falsify or {BLANK} required records will get your certification revoked. fail to keep Failure to reach {BLANK} prior to opening or disposing of appliances will get your certification revoked. required evacuation rates Knowingly releasing HCFCs, CFCs, or HFCs while repairing appliances, with the exception of {BLANK} releases will get your certification revoked. de-minimus Whose responsibility is it to ensure that refrigerant has been removed from appliances before disposal? final person in the disposal chain Since what date has it been illegal to service, maintain or dispose of appliances without being appropriately certified? november 14th, 1994 Since what date has it been illegal to vent CFCs or HCFCs? july 1st, 1992 Since what date has it been illegal to vent HFCs? november 15th, 1995 Failure to {BLANK} refrigerant before opening or disposing of an appliance will get your certification revoked. recover Who has to approve a recovery device? epa A recovery device must have what type of fittings? low loss A recovery device must be registered with the EPA(true or false) true You can only add nitrogen to a system if it is ... empty What steps must be taken to dispose of a disposable cylinder? recover to 0 psi, render useless, recycle the metal. When did the Montreal Protocol go into effect? mid 1989 What date were CFCs phased out? december 31st, 1995 Recovery equipment manufactured after what date must be certified and labelled by the EPA? november 15th, 1993 What are the 2 types of recovery equipment? system-dependent and self-contained What type of recovery device captures refrigerant with the assistance of components in the appliance? system-dependent What type of recovery device has its own means to draw refrigerant out of the appliance? self-contained What date did it become mandatory for buyers of CFCs and HCFCs to be certified technicians? november 14th, 1994 Which section of the clean air act do technicians need to be certified in order to purchase refrigerant in amounts smaller than 20lbs? 609 motor vehicle air conditioning Which type of refrigerant is considered ozone frielndly? hfc What type of refrigerant is r-134a? hfc Which refrigerant is generally used to replace r-12? r-134a What type of oil is used in an r-134a system? esters Can esters be mixed with other oils? no What do we call a 3-part blend? ternary What type of oil is used with ternary blends? alkyl benzene What type of oil has a high affinity for water? hygroscopic Why will the components of a refrigerant blend leak at different rates? different vapor pressures Do you charge a system with a blended refrigerant in the high side or the low side? high side Do you charge a vapor blend in liquid form or vapor form? liquid What is the term used for a refrigerant blend that has multiple boiling points and condensing points? temperature-glide What is the term for a refrigerant blend that does not have temperature-glide? azeotropic A service aperture or stub is required on all equipment of what types? Class I and class II What must you do if you discover that two or more refrigerants have been mixed in a system? recover the mixture into a separate tank Can you mix refrigerants into the same recovery tank? no What does a strong odor durint the recovery process usually indicate? compressor burn out What should you watch out for if you discover a burnt out compressor? oil contamination Can nitrogen be legally flushed from a system after it is used to flush debris out of a system? yes What additional component should also be installed when you replace a burn out compressor? suction line filter drier The {BLANK} the ambient temperature, the slower the recovery process. lower Do you want long or short hoses when recovering? short Long hoses will cause excessive pressure drop, increased recovery time, and have a potential for increased emissions. (true or false) true After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration system, you should guard against trapping liquid refrigerant, where? between the service valves What type of leak detection should you use first, to determine the general area of the leak? electronic or ultrasonic What method is used to zero-in on the exact spot of a leak? soap bubbles Dehydration through evacuation removes what? water and water vapor What two substances are formed if water is allowed to remain in a refrigeration system? hydrochloric and hydrofluoric acid Is it possible to over-evacuate a system? no WHen evacuating, you must always achieve the {BLANK} vacuum level. mandated What 5 things affect the speed and efficiency of evacuation? size of system, ambient temperature, moisture in system, size of vacuum pump, suction line. Vacuum lines should equal to or larger than... pump intake connection Should the system vacuum gauge be close or far from the vacuum pump? far Measuring a system vacuum should be done with the system isolated, and the vacuum pump turned off (true or false). true What is complete when the vacuum gauge shows that you have reached and held the required vacuum. dehydration Disposable cylinders are only used with ... virgin refrigerant Disposable cylinders must be used for recovery(true or false). false Name the ports of a recovery cylinder. liquid and vapor A refillable recovery container can be filled to what capacity? 80% of capacity by weight Name the 3 ways filling of a recovery cylinder can be controlled. mechanical float, electronic shut off, weight. Refillable containers must be hydrostatically tested and date stamped how often? every 5 years. Who regulates refillable cylinders? DOT Recovery cylinders are what color? yellow tops and gray bodies All cylinders should be inspected for what? rust What should be done if a cylinder appears to have a problem? reduce to 0 psi and discard. What precautions should you take when working with refrigerant? safety glasses, gloves, follow manufacturers precautions. When pressurizing with nitrogen, what should always be used? pressure regulator When pressurizing with nitrogen, what should always be inserted downsteam? relief valve When leak checking a system, why can't oxygen or compressed air be used? explosion Where can you find safe pressure for leak-checking? data plate Is it ok to cut or braze a refrigerant line on a charged system? no What does SCBA stand for? self contained breathing apparatus Refrigerant is lighter than air.(true or false) false How can inhaling refrigerant affect the human body? heart irregularity, unconsciousness, asphyxia When exposed to an open flame or hot metal surface, r-12 and r-22 will form what three compounds? hydrochloric acid, hydrofluoric acid, phosgene gas. What must be stamped on a DOT classification tag? 2.2 non-flammable gas