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EPA 608 Type 1
Small appliances practice (test may include content from Core & Types 2/3)
| Question | Answer |
|---|---|
| When using [what type of recovery device in what scenario] is it essential to take extra measures (such as heating or striking compressor) to help release trapped refrigerant from compressor oil? | correct answer: passive system-dependent recovery devices on small appliances with non-operating compressors incorrect options: active/self-contained recovery device, passive recovery devices on operating system, when refrigerant system has low side leak |
| At high temperatures (i.e. exposure to open flames, glowing metal surfaces, etc.), refrigerants can decompose to form [what kind of gas]? | correct answer: phosgene gas incorrect options: hydrozine gas, helium gas, all of above will be formed |
| When using system-dependent recovery system on appliance that has operating compressor, technicians should [do what and recover from where]? | correct answer: run compressor and recover from high side of system only incorrect options: run compressor and recover from low side of system only, install access fittings on both high/low sides of system, never allow refrig. to go to high side |
| When using system-dependent recovery system on appliance that has non-operating compressor, technicians should [do what to recover from where]? | correct answer: place access fitting on both low and high side of system incorrect options: not heat oil to release refrigerant, send unit to junkyard to be crushed, cut unit's suction line to release refrigerant |
| When is it essential to take measures to help release CFC, HCFC, or HFC refrigerant from compressor oil during refrigerant recovery? | correct answer: when using passive recovery devices on small appliances with non-operating compressors incorrect options: when using self-contained recovery devices, when using system-dependent active recovery devices, when system has low side leak |
| On small appliance with operating compressor that has completely plugged capillary tube, what is minimum number of access valves that are needed to evacuate refrigerant? | correct answer: only one access valve, on high side of system incorrect options: only one access valve on low side of system, two valves (one on high side and one on low side) because tube is plugged, all of above |
| Which of following are included in EPA's definition of "small appliance?" | correct answer: products manufactured, fully charged, and hermetically sealed in factory incorrect options: products having 15 pounds or less of refrigerant, products with compressors under 1 horsepower, fully charged split system components |
| When using self-contained recovery device on CFC, HCFC, or HFC system with operating compressor, technicians must [recover to what level]? | correct answer: either recover refrigerant to 4 inches of mercury vacuum or 90% of nameplate charge incorrect options: recover to 5 inches of Hg vacuum, recover 80% of nameplate charge, recover to both 4 inches Hg vacuum & 80% of nameplate charge |
| What may be done to speed recovery process and ensure that all CFC, HCFC, or HFC refrigerant has been removed from frost-free refrigerator? | correct answer: turn on defrost heater to increase refrigerant's temp. & vaporize any liquid incorrect options: cool comp. to force liq. out of high side, heat recov. cyl. to vaporize liq. refrig., pack ice around evap. to ensure max liq. is available |
| If reclamation facility receives tank of mixed refrigerant, they may do what? | correct answer: refuse to accept refrigerant or charge extra for processing it incorrect options: vent refrigerant, resell refrigerant for reuse in its current state, agree to separate refrigerants by fracking process |
| What is maximum allowable factory charge of refrigerant for Type I appliances using CFCs, HCFCs, or HFCs? | correct answer: 5 pounds incorrect options: 3 pounds, 10 pounds, 15 pounds |
| Which refrigerants can be mixed in appliance? | correct answer: refrigerants cannot be mixed incorrect options: R-22 and R-407C, R-12 and R-134a, R-407C and R-410A |
| Passive system-dependent recovery equipment/device/process for small appliances: | correct answer: captures refrigerant in non-pressurized container incorrect options: still uses pump to recover refrigerant, must use pressure relief device when recovering refrigerant, can only be performed on system with operating compressor |
| Why should low and high side access valves be installed when recovering refrigerant from household refrigerator? | correct answer: to improve speed of recovery incorrect options: to prevent non-condensables contamination, to protect recovery machine, to prevent oil migration |
| All appliances must be equipped with service aperture or process stub which is used when adding or removing refrigerant from appliance. What is typically used on small appliances? | correct answer: straight piece of tubing entered using piercing access valve incorrect options: line located 15" below compressor, valve installed at factory which has 1/4" diameter & machine threads, small appliances are exempt from this requirement |
| What is maximum normal charge of HCFC or HFC refrigerant in appliance that is allowed to use system-dependent recovery equipment? | correct answer: 15 pounds incorrect options: 5 pounds, 10 pounds, 50 pounds |
| For which of following refrigeration systems/appliances would it be permissible to use passive recovery device for recovery of CFCs, HCFCs, and HFCs? | correct answer: domestic refrigerator incorrect options: centrifugal air conditioner, reciprocating liquid chiller, single compressor large commercial walk-in freezer |
| Which of following is approved refrigerant for new household refrigerators, freezers, and combination refrigeration/freezers? | correct answer: R-600a (isobutane) incorrect options: R-1234yf, R-1234zd, R-170 |
| Which hydrocarbon (HC) refrigerant is approved for retrofit into existing household refrigerators? | correct answer: hydrocarbons are not approved for retrofit applications incorrect options: HC R-600a 2 ounces or less, blended HC R-441A, HC R-290 1 lb. or less |
| When installing any type of access fitting onto sealed system: | correct answer: fitting should be leak tested before proceeding with recovery incorrect options: not necessary to leak test access fitting, fitting need not be leak tested until repair is completed, system must be pressurized with dry nitrogen before |
| If, after installing fitting for purpose of recovering appliance's refrigerant, you find that system pressure is 0psig: | correct answer: refrigerant recovery is not required incorrect options: utilize recovery equipment to achieve 4 inch vacuum, pressurize system with nitrogen prior to recovery, pressurize system and leak system |
| System-dependent recovery methods may only be used on appliances containing: | correct answer: 15 pounds of refrigerant or less incorrect options: more than 15 pounds of refrigerant, 18 pounds of refrigerant or less, refrigerant vapor that is vented off top of cylinder must be recovered |
| When filling charging cylinder with regulated refrigerant: | correct answer: refrigerant vapor vented off top of cylinder must be recovered incorrect options: it must be added as vapor to reduce losses, refrigerant being added must be weighed to ensure accuracy, vapor can be vented off top as de minimis release |
| Which of following is an example of non-condensable? | correct answer: air incorrect options: moisture, R-12. R-134a |
| Which of following is true regarding refrigerant leaks on small appliances? | correct answer: EPA does not require repair, but leaks should be repaired whenever possible incorrect options: all Type I equipment leaks must be repaired, only very large leaks must be repaired, all systems with annual leak rate of 15%+ must be repaired |
| With non-operating system compressor, recovery equipment must be capable of recovering: | correct answer: 80% of refrigerant or achieving 4" (Hg) of vacuum incorrect options: 90% of refrigerant or achieving 4" of vacuum, 90% of refrigerant or achieving 5" of vacuum, 80% of refrigerant or achieving 5" of vacuum |
| After refrigerant has been recovered, which of following can be used to flush system? | correct answer: nitrogen incorrect options: compressed air, water, R-22 |
| Type I Certification is required for: | correct answer: persons handling refrigerant during maintenance, service, or repair of small appliances incorrect options: all persons who work refrig. factories, all persons working at refrig. disposal site, owners of refrig. manufacturing companies |
| Which HC refrigerant is allowed for use in new domestic small appliances? | correct answer: R-600a (isobutane) incorrect options: R-717, R-404A, R-410A |
| On system with operating compressor, recovery equipment must be capable of recovering: | correct answer: 90% refrigerant or achieving 4" (Hg) of vacuum incorrect options: 95% of refrigerant or achieving 5" of vacuum, 80% refrigerant or achieving 4" of vacuum, 100% refrigerant or achieving 0" of vacuum |
| Small appliances in recreational vehicles may use refrigerants such as ammonia, hydrogen, and water. These refrigerants: | correct answer: should not be recovered incorrect options: must be recovered, should be stored for later use, must be pressurized prior to use |
| Recovery equipment must be: | correct answer: certified by EPA-approved testing laboratory incorrect options: CSA approved, used on all equipment manufactured after July 1995, used on all equipment manufactured after November 1995 |
| When pressurizing system with nitrogen, you should: | correct answer: both charge through pressure regulator and install relief valve in line downstream from pressure regulator incorrect option: never exceed 3.5 times high side pressure rating |
| Small appliance is defined by EPA as: | correct answer: appliances manufactured/charged/hermetically sealed in factory containing 5 lbs. or less of refrig. incorrect options: containing 8 lbs. or less of refrig., 10 lbs. or less, appliances with internal volumes no greater than 3 cubic feet |
| Applying heat, with a heat gun, to the compressor: | correct answer: can help vaporize any trapped liquid refrigerant during recovery incorrect options: can help free up bound compressor motor, can help remove trapped refrigerant vapor during recovery, can aid in isolating and pinpointing refrigerant leak |
| Self-contained or active recovery equipment: | correct answer: has its own means to recover refrigerant incorrect options: depends on special charcoal bag filter, is not capable of reaching required liquid rates, requires vacuum pump rated at more than 3CFM |
| Technicians who perform sealed-system service on small appliances must have: | correct answer: Type I or Universal certification incorrect options: Type 1, 2, or 3 certification, Type II certification, Universal 609 certification |
| Small appliances are equipped with straight piece of tubing (process stub) that is used: | correct answer: as installation location for piercing type access valve incorrect options: to help technician measure system subcooling, as p-trap to help capture system contaminants and debris, to help technician measure evaporator superheat |
| Recovering multiple types of refrigerants in the same cylinder: | correct answer: will make reclaimed refrigerants unreclaimable incorrect options: is acceptable field service practice, will require venting to properly dispose of it, will lower pressure in recovery cylinder |
| If strong odor is detected while performing refrigerant recovery process: | correct answer: compressor burnout has likely occurred incorrect options: condenser has been operating incorrectly, wrong oil has probably been added to unit, system has likely been subjected to power surge |
| When system is in deep vacuum: | correct answer: never energize compressor incorrect options: never add refrigerant to system, never use micron gauge, never energize system fans and blowers |
| If EPA regulations should change after technician becomes certified: | correct answer: it is technician's responsibility to comply with any future changes in law incorrect options: technician must retake certification exam within 90 days, must retake test within 6 months, there are no additional compliance requirements |
| Recovery equipment used for service or repair of small appliances must be certified by EPA-approved laboratory if recovery equipment was manufactured after: | correct answer: November 15, 1993 incorrect options: May 1993, June 1992, July 1993 |
| Why is it important to obtain accurate pressure reading of refrigerant inside recovery cylinder? | correct answer: pressure reading along with temperature reading can indicate if there is excessive air or other non-condensables in cylinder incorrect options: can indicate remaining capacity, can indicate if refrig. has been damaged, all of above |
| Recovery devices that were manufactured after November 15, 1993 and are used for recovery of refrigerant from small appliances must be capable of: | correct answer: recovering 90% of refrig. when compressor is operating or achieving 4" vacuum under conditions of ARI 740-1993 incorrect options: recovering 95% of refrig. when comp. is operating or achieving 4" vacuum, 80%, 85% |
| Solderless piercing valves should not remain installed on refrigeration systems after completion of repairs because: | correct answer: they tend to leak over time incorrect options: they are too expensive to remain on every product, they become loose and vibrate, all of above |
| Whenever nitrogen is used to pressurize or blow debris out of system: | correct answer: only nitrogen vapor should be used incorrect options: only liquid nitrogen should be used, either liquid or vapor nitrogen can be used, nitrogen can only be used if mixed with R-22 |
| What can cause excessive pressure on high side of active self-contained recovery device? | correct answer: either closed recovery tank inlet valve or excessive air / other non-condensables in recovery tank incorrect option: closed recovery tank outlet valve |
| Portable refillable tanks or containers used to ship recovered refrigerants must meet what standards? | correct answer: Department of Transportation (DOT) incorrect options: Community Right to Know Act, Underwriters Laboratories (UL), all of above |
| Recovery cylinder which is half full of recovered R-22 at normal room temperature (about 75 degrees F), in the absence of non-condensables, will be pressurized to: | correct answer: 130psig (rounded from 132psig on P/T chart for R-22 at 75 degrees F saturation temperature) incorrect options: 175psig, 200psig, 250psig |
| Before beginning refrigerant recovery procedure, it is always necessary to: | correct answer: determine type of refrigerant in system incorrect options: allow system to stabilize, move system to outdoor location, disconnect appliance from its power source |
| Which of following refrigerants must be recovered with equipment currently regulated by equipment certification requirements of EPA under Section 608? | correct answer: R-12 incorrect options: sulfur dioxide, methyl chloride, methyl formate |
| In event of large release of any oxygen-displacing refrigerant in contained area, which of following is true? | correct answer: self-contained breathing apparatus (SCBA) or leaving area is required incorrect options: safety goggles and lined butyl gloves are all that is needed, respiratory protection is not required, dust masks are sufficient protection |
| According to EPA, which recovery equipment maintenance practice(s) should be performed on regular basis? | correct answer: check recovery device for refrigerant leaks incorrect options: check vacuum pump for any leaks, check amperage draw of recovery device, all of above |
| Small amounts of refrigerant have no odor, therefore if pungent odor is detected during system recovery and/or repair: | correct answer: compressor burnout has likely occurred incorrect options: it is characteristic smell of oil, refrigerant should not be recovered, none of above |
| When recovering refrigerant into non-pressurized container from refrigerator with non-operative compressor: | correct answer: it is necessary to heat/strike compressor with rubber mallet incorrect options: only need to recover as much as will naturally flow out, not necessary to recover any as likely contaminated, must drive any from oil by using pressurized N |
| Large spills of refrigerant can cause suffocation because: | correct answer: they are heavier than air and displace oxygen incorrect options: they smell strong and make breathing difficult, they are lighter than air and cause dizziness. they sting nose and cause sneezing |
| Which of following is not Type I appliance? | correct answer: MVAC-like system that holds three pounds of R-12 (motor vehicle air conditioning covered by EPA/Clean Air Act 609) incorrect options: water cooler holding 13oz. of R-12, food freezer holding 22oz. of R-22, dehumidifier with 7oz. of R-500 |
| When regulated refrigerant is recovered from appliance, it: | correct answer: must be recovered into its own recovery vessel (or recovery cylinder that already contains some of that refrigerant) incorrect options: can be mixed with any other refrigerant, can be vented to atmosphere, does not need to be reclaimed |
| When you connect your service manifold to check system pressures, it's always good to: | correct answer: use equipment such as hand valves/self-sealing hoses to minimize any release incorrect options: release refrig. to smell for acid, recover refrig./recharge to specifications even when no repairs are needed, use recovery equipment |
| EPA requires that all appliances must be equipped with service aperture or other device that is used when adding or removing refrigerant from appliance. For small appliances, this service port typically is: | correct answer: straight piece of tubing, called process tube, that is entered using piercing access valve incorrect options: located 15 inches below compressor, installed at factory with 1/4" diameter/machine threads, not present because they are exempt |
| Anyone who recovers refrigerant during maintenance, service, or repair of small appliances must be certified as either Universal Technician or: | correct answer: Type I Technician incorrect options: Type II technician, Type III technician, Core certified technician |
| EPA regulations require capture of at least 80% of refrigerant from small appliance with non-operating compressor if technician is using: | correct answer: either type of recovery unit (active/self-contained or passive/system-dependent) incorrect options: system-dependent (passive), self-contained (active), refrigerant recovery from inoperable systems is not required |
| When using passive system-dependent recovery method on appliance with operating compressor, you should run appliance's compressor: | correct answer: and recover refrigerant from high side incorrect options: on 240V while recovering from capillary tube, for several minutes shutting it off then recovering from high side, for several minutes shutting it off then recovering from low side |
| Sale of CFC and HCFC refrigerants is: | correct answer: restricted to technicians who are EPA certified in refrigerant recovery incorrect options: banned, limited by law to equipment owners of commercial equipment, allowed only if quantity is less than 5 pounds |
| Which of refrigerants listed below should be recovered with current EPA-approved recovery devices? | correct answer: none of above (ammonia, hydrogen, water) |
| When servicing small appliance with leak: | correct answer: it is not mandatory to repair leak but do so whenever possible incorrect options: it is mandatory to repair leaks within 30 days, it is mandatory to repair leak if more than 35% of charge escapes within 12 month period, both incorrect |
| When using any equipment or servicing any system that has Schrader valves, it is critical to: | correct answer: all of above (inspect Schrader valve core for bends and breakage, replace any damage Schrader valve core to prevent leakage, cap Schrader ports to prevent accidental depression of valve core) |
| If CFC, HCFC, or HFC refrigerants are exposed to high temperatures, these refrigerant decompose to form what acids? | correct answer: hydrochloric and hydrofluoric acids incorrect options: sulfuric and phosphoric acids, boric and chromic acids, none of above |
| When using graduated charging cylinder, any refrigerant that is vented from charging cylinder: | correct answer: must be recovered incorrect options: does not need to be recovered, is considered de minimis release, none of above |
| Standard vacuum pump designed specifically for evacuation and dehydration can: | correct answer: never be used as recovery device with pressurized container incorrect options: be used alone as self-contained recov. device, be used alone as substitute for any recov. device, be used alone as system-dependent recov. device |
| EPA Section 608 certification must be renewed how often? | correct answer: EPA certification has no expiration date incorrect options: 2 years, 3 years, 10 years |
| Prior to shipping any used refrigerant, it is necessary to: | correct answer: all of above (properly label refrigerant container, properly complete shipping paperwork, check that refrigerant container meets Department of Transportation standards) |
| Refrigerant that can be used as direct service "drop in" substitute for R-12 in small appliance is: | correct answer: none of above incorrect options: R-410A, R-134a, R-141b |
| After installing and opening piercing access valve, if system pressure is ______ do not begin recovery procedure. | correct answer: 0psig incorrect options: 15psig, 30psig, 40psig |
| EPA definition of small appliance includes which of following? | correct answer: both device manufactured, charged, and hermetically sealed in factory and with charge of 5 pounds or less incorrect option: products with compressors under quarter horsepower |
| It is EPA regulation that any person who opens appliance for maintenance, service, or repair must have at least one self-contained recovery machine available at their place of business. Only exception to this rule are persons working on: | correct answer: small appliances incorrect options: low pressure appliances, high pressure appliances, R-410A systems |
| Which of following are part of EPA's recommended safe work practices? | correct answer: both wear safety glasses or goggle when working with any compressed gases as well as wear butyl-lined gloves when connecting/disconnecting hoses incorrect option: wear respirator when working with any refrigerant |
| Recovery devices that were manufactured before November 15, 1993 and are used for recovery of refrigerant from small appliances must be capable of: | correct answer: recovering 80% of refrig. whether or not compressor is operating or achieving 4" vacuum under conditions of ARI 740-1993 incorrect options: 70% with comp. operating or 4" vacuum, achieving 10" vac., recovering all refrig. still to be used |
| Piercing type valves should only be used on which of following tubing materials? | correct answer: both copper and aluminum incorrect option: steel |
| When using passive system-dependent recovery process, you should access both high and low sides of system for refrigerant recovery if: | correct answer: system's compressor does not run incorrect options: there is leak in system, system's compressor operates normally, system's compressor only runs at half speed |
| Technicians with Type I small appliance certification are certified to recover refrigerant during maintenance, service, or repair of: | correct answer: packaged terminal air conditioners ("PTACs") with 5 pounds or less of refrigerant incorrect options: small unitary A/C systems with 7 pounds or less of refrigerant, low pressure equipment, motor vehicle A/C equipment |
| Recovery cylinder which is half full of recovered R-134a at normal room temperature (about 75 degrees F), in absence of non-condensables, will be pressurized to: | correct answer: 80psig (rounded from 78.7psig on P/T chart for R-134a at 75 degrees F saturation temperature) incorrect options: 30psig, 150psig, 200psig |
| Very high pressure appliance is one that uses refrigerant with liquid phase saturation pressure above 355psig at 104 degrees F. This definition includes which refrigerant? | correct answer: R-744 (only refrigerant listed as very high pressure on top of P/T chart) incorrect options: R-134a, R-410A, all of above |
| Refrigerant that can be used as direct service "drop in" substitute for R-22 in small appliance is: | correct answer: none of above incorrect options: R-134a, R-410A, R-600a |
| If large leak of refrigerant occurs in enclosed area and no self-contained breathing apparatus is available, then technician should: | correct answer: vacate and ventilate spill area incorrect options: put on dust mask/butyl lined gloves then try to stop leak, put on dust mask then use leak detector to locate leak and try to stop it, all of above |
| When recovering refrigerant from household refrigerator with a compressor that does not run, it is recommended that low and high side access valves be installed because: | correct answer: both can enhance speed of recovery and may be necessary to achieve required recovery efficiency incorrect option: otherwise refrigerator's compressor may be damaged |
| Recovery cylinder which is half full of recovered R-12 at normal room temperature (about 75 degrees F). in absence of non-condensables, will be pressurized to: | correct answer: 75psig (rounded from 76.8psig on P/T chart for R-12 at 75 degrees F saturation temperature) incorrect options: 30psig, 150psig, 200psig |
| When using nitrogen, nitrogen tank should always be equipped with: | correct answer: (pressure) regulator incorrect options: level sensor, yellow top, hand valve |
| If you are recovering refrigerant from frost-free refrigerator, you should: | correct answer: turn on defrost heater to vaporize any trapped liquid incorrect options: cool compressor to force liquid out of high side, heat recovery cylinder to vaporize liquid, pack ice around evaporator to ensure maximum liquid available |
| When checking for existence of non-condensable gases inside recovery cylinder, why is it proper procedure to allow temperature of cylinder to stabilize at room temperature before taking pressure reading? | correct answer: comparisons to P/T chart only valid if both refrig. pressure & temperature are stable incorrect options: prevent safety valves from purging excess, quick method of determining tank level, temp. reading alone enough to determine quality |
| Standard vacuum pump designed specifically for evacuation and dehydration can: | correct answer: be only used as recovery device in combination with non-pressurized container incorrect options: be used alone as active recovery device, be used alone as substitute for any recovery device, be used alone as passive recovery device |
| Whenever nitrogen is used to pressurize or blow debris out of system, nitrogen: | correct answer: can be vented incorrect options: must be recovered, nitrogen should never be used, nitrogen can only be used if mixed with R-22 |
| If reclamation processing plant is given recovery tank containing mixture of refrigerants, they can: | correct answer: both refuse to process refrigerant and return it as well as agree to destroy refrigerant but typically substantial fee is charged for destruction incorrect option: resell refrigerant for reuse in its current state |
| Refrigerant recovery devices must be equipped with low loss fittings. Low loss fittings are used to: | correct answer: connect recovery device to appliance which manually/automatically close when they are disconnected to prevent loss of refrigerant from hoses incorrect options: leak only small amounts during use, must be discarded after each use |
| Recovery or recycling equipment which was manufactured after November 15, 1993 and is used to recover refrigerant from small appliances prior to disposal of small appliances must be used to: | correct answer: both recover 80% of refrigerant in appliance if appliance's compressor is inoperative as well as recover 90% of refrigerant in appliance if appliance's compressor is operational incorrect option: recover 90% if compressor is operational |
| Recovery cylinder which is half full of recovered R-410A at 90 degrees F, in absence of non-condensables, will be pressurized to: | correct answer: 300psig (rounded from 275psig on P/T chart for R-410A at 90 degrees F saturation temperature) incorrect options: 100psig, 200psig, 400psig |
| When transporting refrigerants, DOT (Department of Transportation) Regulation number 49 CFR requires __________ to be recorded on shipping papers for hazard class 2.2, Non Flammable Compressed Gases? | correct answer: number of cylinders of each gas incorrect options: volume of each cylinder, total cubic feet of each refrigerant, total weight of all cylinders |
| Which of following is acceptable method for monitoring that fill level of recovery cylinder does not exceed 80%? | correct answer: all of above (tank internal float device, electronic shutoff device, refrigerant scale) |
| Measured pressure and temperature should match what is shown on P/T chart as long as: | correct answer: there is liquid refrigerant present and are no impurities in the cylinder incorrect options: there are impurities in cylinder, there is vapor in cylinder, pressure and temperature are changing |
| Where are household appliances charged with hydrocarbon (HC) refrigerants required to have permanent safety markings? | correct answer: all of above (on or near any evaporators, exposed refrigerant tubing, exterior of refrigerator) |
| In which location is household refrigerator charged with hydrocarbon refrigerants not mandated to have permanent safety markings? | correct answer: inside refrigerator door incorrect options: on or near any evaporators, machine compartment, exterior of refrigerator |
| Which types of refrigerants cannot be used for new Type I appliances? | correct answer: CFCs, HCFCs, and HFCs incorrect options: HFOs, HCs, inorganic |
| What cannot be serviced by Type I technicians? | correct answer: both split systems and motor vehicle air conditioning incorrect options: domestic refrigerators, small appliances containing less than 5 pounds of refrigerant, products manufactured/fully charged/hermetically sealed in factory |
| Technicians should watch for signs of what when recovering refrigerant from system that experienced compressor burnout? | correct answer: oil contamination incorrect options: refrigerant leak, oil leak, water leak |
| What kind of air conditioning system are Type I technicians not allowed to service or dispose of, even if it holds less than 5 pounds of refrigerant? | correct answer: MVAC (motor vehicle) incorrect options: household refrigerators, household freezers, combination refrigerator/freezers |
| Which refrigerants on P/T chart are exempt from venting prohibition and do not need to be recovered? | correct answer: both R-744 (carbon dioxide) and R-717 (ammonia) incorrect options: R-134a |
| Why must recovery tanks be clearly tagged with their contents? | correct answer: to avoid mixing refrigerants incorrect options: for reclaiming, for recycling, for transport |
| What must you do before taking pressure measurement within cylinder to compare to P/T chart as you suspect it may contain multiple refrigerants? | correct answer: allow temperature of cylinder to stabilize incorrect options: label cylinder, check label, look up suspected refrigerant |
| What must be true about contents of cylinder for pressure reading to match relationship on P/T chart? | correct answer: liquid refrigerant must be present and there must be no non-condensables within cylinder incorrect options: must contain multiple refrigerants, cylinder must be upside down, all of above |
| System-dependent or passive recovery equipment: | correct answer: captures refrigerant into non-pressurized container incorrect options: captures refrigerant into one trip refrigerant cylinders, always requires assistance of vacuum pump, is always equipped with external compressor |
| What is maximum allowable factory charge of refrigerant for Type I appliances? | correct answer: 5 pounds incorrect options: 4 pounds, 7 pounds, 10 pounds |
| When R-500 is recovered from appliance, it: | correct answer: must be recovered into its own recovery vessel (or recovery cylinder that already contains some R-500) incorrect options: can be mixed with R-22/R-12 since R-500 is blend, can be mixed with R-12 not R-22, need not be recovered under CAA |
| Passive system-dependent recovery device for small appliances: | correct answer: captures refrigerant in non-pressurized container incorrect options: never needs use of pump/compressor/heat for recovery, must use pressure relief device when recovering, can only be performed on system with operating compressor |
| Sale of refrigerant is: | correct answer: restricted to technicians who are EPA certified in refrigerant recovery incorrect options: banned, limited by law to equipment owners, allowed only if there is proof of need |
| Which refrigerants can be mixed? | correct answer: refrigerants can never be mixed incorrect options: R-12 and R-134a, R-12 and R-500, R-22 and R-410A |
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