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Correct Answers 2024
Where is the stratosphere? - Correct answer-10 to 30 miles Where is ozone located? - Correct answer-stratosphere What does an ozone molecule consist of? - Correct answer-3 oxygen atoms The ozone layer protects us from... - Correct answer-ultraviolet radiation The ozone layer helps to maintain... - Correct answer-stable earth temperatures Depletion of ozone causes... - Correct answer-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? - Correct answer-cfcs and hcfcs What in refrigerants causes ozone depletion? - Correct answer-chlorine What compound is formed when chlorine meets ozone? - Correct answer-chlorine monoxide How many ozone molecules can be destroyed by one chlorine atom? - Correct answer- 100, The rise in the amount of chlorine measured in the stratosphere over the past twenty years matches the rise in... - Correct answer-flourine The chlorine in CFCs will break down in water(true/false). - Correct answer- false The chlorine in CFCs will break down into compounds that will dissolve in water(true/false). - Correct answer-false What does ODP stand for? - Correct answer-ozone depletion potential HFCs have a higher ODP than CFCs (true/false). - Correct answer-false Which refrigerant type has no ODP? - Correct answer-HFCs What chemicals make up CFCs? - Correct answer-chlorine flourine carbon
What chemicals make up HCFCs? - Correct answer-hydrogen chlorine fluorine carbon What chemicals make up HFCs? - Correct answer-hydrogen fluorine carbon Give examples of CFCs? - Correct answer-r-11, 12, 500 Give examples of HCFCs? - Correct answer-r-22, 123 Give examples of HFCs? - Correct answer-r-134a Who regulates section 608 of the clean air act? - Correct answer-epa How much is the fine for releasing refrigerant into the atmosphere? - Correct answer- 27,500 per day per violation. What is the bounty for turning someone in? - Correct answer-up to 10, Who gets fined? - Correct answer-you and your company Can the EPA require you to demonstrate the ability to properly perform refrigerant recovery/recycling duties? - Correct answer-yes What can happen if you cannot properly perform recovery/recycling? - Correct answer- revocation of certification To falsify or {BLANK} required records will get your certification revoked. - Correct answer-fail to keep Failure to reach {BLANK} prior to opening or disposing of appliances will get your certification revoked. - Correct answer-required evacuation rates Knowingly releasing HCFCs, CFCs, or HFCs while repairing appliances, with the exception of {BLANK} releases will get your certification revoked. - Correct answer-de- minimus Whose responsibility is it to ensure that refrigerant has been removed from appliances before disposal? - Correct answer-final person in the disposal chain Since what date has it been illegal to service, maintain or dispose of appliances without being appropriately certified? - Correct answer-november 14th, 1994 Since what date has it been illegal to vent CFCs or HCFCs? - Correct answer-july 1st, 1992 Since what date has it been illegal to vent HFCs? - Correct answer-
Failure to {BLANK} refrigerant before opening or disposing of an appliance will get your certification revoked. - Correct answer-recover Who has to approve a recovery device? - Correct answer-epa A recovery device must have what type of fittings? - Correct answer-low loss A recovery device must be registered with the EPA(true or false) - Correct answer-true You can only add nitrogen to a system if it is ... - Correct answer-empty What steps must be taken to dispose of a disposable cylinder? - Correct answer- recover to 0 psi, render useless, recycle the metal. When did the Montreal Protocol go into effect? - Correct answer-mid 1989 What date were CFCs phased out? - Correct answer-december 31st, 1995 Recovery equipment manufactured after what date must be certified and labelled by the EPA? - Correct answer-november 15th, 1993 What are the 2 types of recovery equipment? - Correct answer-system- dependent and self-contained What type of recovery device captures refrigerant with the assistance of components in the appliance? - Correct answer-system-dependent What type of recovery device has its own means to draw refrigerant out of the appliance? - Correct answer-self-contained What date did it become mandatory for buyers of CFCs and HCFCs to be certified technicians? - Correct answer-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? - Correct answer- motor vehicle air conditioning Which type of refrigerant is considered ozone frielndly? - Correct answer-hfc What type of refrigerant is r-134a? - Correct answer-hfc Which refrigerant is generally used to replace r-12? - Correct answer-r-134a What type of oil is used in an r-134a system? - Correct answer-esters
Can esters be mixed with other oils? - Correct answer-no What do we call a 3-part blend? - Correct answer-ternary What type of oil is used with ternary blends? - Correct answer-alkyl benzene What type of oil has a high affinity for water? - Correct answer-hygroscopic Why will the components of a refrigerant blend leak at different rates? - Correct answer- different vapor pressures Do you charge a system with a blended refrigerant in the high side or the low side? - Correct answer-high side Do you charge a vapor blend in liquid form or vapor form? - Correct answer- liquid What is the term used for a refrigerant blend that has multiple boiling points and condensing points? - Correct answer-temperature-glide What is the term for a refrigerant blend that does not have temperature- glide? - Correct answer-azeotropic A service aperture or stub is required on all equipment of what types? - Correct answer- Class I and class II What must you do if you discover that two or more refrigerants have been mixed in a system? - Correct answer-recover the mixture into a separate tank Can you mix refrigerants into the same recovery tank? - Correct answer-no What does a strong odor durint the recovery process usually indicate? - Correct answer- compressor burn out What should you watch out for if you discover a burnt out compressor? - Correct answer-oil contamination Can nitrogen be legally flushed from a system after it is used to flush debris out of a system? - Correct answer-yes What additional component should also be installed when you replace a burn out compressor? - Correct answer-suction line filter drier The {BLANK} the ambient temperature, the slower the recovery process. - Correct answer-lower Do you want long or short hoses when recovering? - Correct answer-short
A refillable recovery container can be filled to what capacity? - Correct answer-80% of capacity by weight Name the 3 ways filling of a recovery cylinder can be controlled. - Correct answer- mechanical float, electronic shut off, weight. Refillable containers must be hydrostatically tested and date stamped how often? - Correct answer-every 5 years. Who regulates refillable cylinders? - Correct answer-DOT Recovery cylinders are what color? - Correct answer-yellow tops and gray bodies All cylinders should be inspected for what? - Correct answer-rust What should be done if a cylinder appears to have a problem? - Correct answer-reduce to 0 psi and discard. What precautions should you take when working with refrigerant? - Correct answer- safety glasses, gloves, follow manufacturers precautions. When pressurizing with nitrogen, what should always be used? - Correct answer- pressure regulator When pressurizing with nitrogen, what should always be inserted downsteam? - Correct answer-relief valve When leak checking a system, why can't oxygen or compressed air be used? - Correct answer-explosion Where can you find safe pressure for leak-checking? - Correct answer-data plate Is it ok to cut or braze a refrigerant line on a charged system? - Correct answer-no What does SCBA stand for? - Correct answer-self contained breathing apparatus Refrigerant is lighter than air.(true or false) - Correct answer-false How can inhaling refrigerant affect the human body? - Correct answer-heart irregularity, unconsciousness, asphyxia When exposed to an open flame or hot metal surface, r-12 and r-22 will form what three compounds? - Correct answer-hydrochloric acid, hydrofluoric
acid, phosgene gas. What must be stamped on a DOT classification tag? - Correct answer-2.2 non- flammable gas
