Certified refrigerant recovery or recycling equipment means equipment manufactured before November 15, 1993, that meets the standards in 82.158(c), (e), or (g); equipment certified by an approved equipment testing organization to meet the standards in 82.158(b), (d), or (f); or equipment certified pursuant to 82.36(a). In general, recycled refrigerant is cleaned using oil separation and single or multiple passes through devices, such as replaceable core filter-driers, which reduce moisture, acidity, and particulate matter. 240 What would you check if the automatic shutoff nozzle continuously shuts off? 2003-2022 Chegg Inc. All rights reserved. Which of the following are included in EPA's definition of a "small appliance?". C: IT IS NOT NECESSARY TO RECOVER SINCE THE REFRIGERANT IS PROBABLY CONTAMINATED D: IT IS NECESSARY TO CHASE THE REFRIGERANT FROM THE OIL WITH PRESSURIZED DRY NITROGEN. WHICH OF THESE SHOULD BE RECOVERED WITH CURRENT EPA-APPROVED RECOVERY DEVICES? (iii) Step 3. D: THE SYSTEM MUST BE PRESSURIZED WITH DRY NITROGEN BEFORE LEAK TESTING CAN BE ATTEMPTED. A: an MVAC like system that holds 3 lbs of R-12 B: a water cooler that hold 13oz. Substitute means any chemical or product, whether existing or new, that is used as a refrigerant to replace a class I or II ozone-depleting substance. B: ONLY ONE, ON THE LOW SIDE. C: CAPTURES REFRIGERANT IN A NON-PRESSURIZED CONTAINER D: CAN ONLY BE PERFORMED ON A SYSTEM WITH AN OPERATING COMPRESSOR, WHEN FILLING A GRADUATED CHARGING CYLINDER, REFRIGERANT THAT IS VENTED OFF THE TOP OF THE CYLINDER: A: NEED NOT BE RECOVERED B: MUST BE RECOVERED C: IS CONSIDERED A DE MINUS RELEASE D: NONE OF THE ABOVE.
A: CHECK VACUUM PUMP FOR ANY LEAKS B: CHECK RECOVERY DEVICE FOR ANY REFRIGERANT LEAKS C: CHECK AMP DRAW OF RECOVERY DEVICE D: ALL OF THE ABOVE, SINCE SMALL AMOUNTS OF CFC/HCFC REFRIGERANT HAVE NO ODOR, WHEN A PUNGENT ODOR IS DETECTED DURING A SEALED SYSTEM RECOVERY OR REPAIR: A: THE REFRIGERANT SHOULD NOT BE RECOVERED B: A COMPRESSOR BURN OUT HAS LIKELY OCCURRED C: IT IS THE CHARACTERISTIC SMELL OF REFRIGERANT D: NONE OF THE ABOVE, AFTER RECOVERING REFRIGERANT FROM A SEALED SYSTEM, IF NITROGEN IS USED TO PRESSURIZE OR BLOW DEBRIS OU OF THE SYSTEM THE NITROGEN: A: MUST BE RECOVERED B: MAY BE VENTED C: SHOULD NOT BE USED D: SHOULD ONLY BE USED IF MIXED WITH AMMONIA, WHICH REFRIGERANTS CAN BE MIXED? B: RUN THE COMPRESSOR FOR SEVERAL MINUTES, SHUTTING OFF THEN RECOVERING FROM THE HIGH SIDE C: RUN COMPRESSOR AND RECOVER FROM THE HIGH SIDE D; RUN COMPRESSOR FOR SEVERAL MINUTES, SHUT OFF AND THEN RECOVER FROM THE LOW SIDE. Hydrocarbons are not approved for retrofit applications. Activities conducted on appliances that have been properly evacuated pursuant to 82.156 are not reasonably expected to release refrigerants unless the activity includes adding refrigerant to the appliance.
A: WHEN THE RECOVERY TANK INLET VALVE HAS NOT BEEN OPENED B: WHEN THERE IS EXCESS AIR IN THE RECOVERY TANK C: WHEN THE RECOVERY TANK OUTLET VALVE HAS NOT BEEN OPENED D: BOTH A AND B, WHICH OF THE FOLLOWING IS NOT A METHOD OR DEVICE PRESENTLY USED FOR MONITORING THE 80% FILL LEVEL IN A RECOVERY TANK? Disposal means the process leading to and including: (1) The discharge, deposit, dumping or placing of any discarded appliance into or on any land or water; (2) The disassembly of any appliance for discharge, deposit, dumping or placing of its discarded component parts into or on any land or water; (3) The vandalism of any appliance such that the refrigerant is released into the environment or would be released into the environment if it had not been recovered prior to the destructive activity; (4) The disassembly of any appliance for reuse of its component parts; or. Retire, when referring to an appliance, means the removal of the refrigerant and the disassembly or impairment of the refrigerant circuit such that the appliance as a whole is rendered unusable by any person in the future. A: TO PREVENT SAFETY VALVES FROM PURGING REFRIGERANT B: IT IS A QUICK WAY TO DETERMINE REFRIGERANT LEVEL INSIDE TANK.
Find the component of a in the direction of b. D: WHEN SYSTEM HAS A LOW SIDE LEAK. A: AMMONIA B: HYDROGEN C: WATER D: NON OF THE ABOVE, WHICH OF THE FOLLOWING REFRIGERANTS IS MOST COMMONLY USED AS A REPLACEMENT FOR R-12 IN NEW HOUSEHOLD REFRIGERATORS? How many access valves are needed to recover the refrigerant on a sealed system with an operating compressor that has a completely restricted capillary tube? Take the sum of the pounds of refrigerant added to the appliance over the previous 365-day period (or over the period that has passed since the last successful follow-up verification test showing all identified leaks in the appliance were repaired, if that period is less than one year); (ii) Step 2. Equipment which is used to recover CFC, HCFC, and HFC refrigerant from small appliances for the purpose of disposal must meet what standard? Very high-pressure appliance means an appliance that uses a refrigerant with a critical temperature below 104 F or with a liquid phase saturation pressure above 355 psia at 104 F. A stan dard vacuum pump designed specifically for evacuation and dehydration can; never be used as a recovery device in combination with a pressurized container. C: RECOVERS REFRIGERANT IN A NON PRESSURIZED CONTAINER D: CAN ONLY BE PERFORMED ON A SYSTEM WITH AN OPERATING COMPRESSOR, WHICH OF THE FOLLOWING ARE SAFE WORK PRACTICES WHEN RECOVERING REFRIGERANT: A: WEAR SAFETY GLASSES WHEN WORKING WITH ANY COMPRESSED GASES B: WEAR A RESPIRATOR WHEN WORKING WITH ANY REFRIGERANT C: WEAR BUTYL-LINED GLOVES WHEN CONNECTING/DISCONNECTING HOSES D: BOTH A AND C, WHEN USING NITROGEN IN REPAIRING A SEALED REFRIGERATION SYSTEM, THE NITROGEN TANK SHOULD ALWAYS BE EQUIPPED WITH A: A: REGULATOR B: FLOAT SENSOR C: RED TOP D: HAND VALVE, IN THE EVENT OF A LARGE RELEASE OF R-12 OR R-22 IN A CONTAINED AREA, WHICH OF THE FOLLOWING ARE TRUE?
Industrial process refrigeration means complex customized appliances that are directly linked to the processes used in, for example, the chemical, pharmaceutical, petrochemical, and manufacturing industries. Seasonal variance means the removal of refrigerant from an appliance due to a change in ambient conditions caused by a change in season, followed by the subsequent addition of an amount that is less than or equal to the amount of refrigerant removed in the prior change in season, where both the removal and addition of refrigerant occurs within one consecutive 12-month period.
Small appliance means any appliance that is fully manufactured, charged, and hermetically sealed in a factory with five (5) pounds or less of refrigerant, including, but not limited to, refrigerators and freezers (designed for home, commercial, or consumer use), medical or industrial research refrigeration equipment, room air conditioners (including window air conditioners, portable air conditioners, and packaged terminal air heat pumps), dehumidifiers, under-the-counter ice makers, vending machines, and drinking water coolers. Technician also means any person who in the course of disposal of an appliance (except small appliances, MVACs, and MVAC-like appliances) could be reasonably expected to violate the integrity of the refrigerant circuit and therefore release refrigerants from the appliances into the environment. C: ONLY ONE ON THE HIGH SIDE D: ALL OF HE ABOVE, TO SPEED THE RECOVERY PROCESS AND ENSURE THAT ALL REFRIGERANT HAS BEEN REMOVED FROM A FROST FREE REFRIGERATOR: A: COOL THE COMPRESSOR TO FORCE LIQUID OUT THE COMPRESSOR B: HEAT THE RECOVERY CYLINDER TO VAPORIZE THE REFRIGERANT C: TURN ON THE DEFROST HEATER TO VAPORIZE ANY TRAPPED LIQUID D: PACK ICE AROUND THE EVAPORATOR TO ENSURE MAXIMUM LIQUID IS AVAILABLE. WHEN USING A SYSTEM-DEPENDENT (PASSIVE) RECOVERY PROCESS ON OPERATING COMPRESSORS, TECHS SHOULD: A: RUN THE COMPRESSOR AT 240 VOLTS WHILE RECOVERING THE REFRIGERANT FROM THE CAPILLARY TUBE. Recovering 90 % of the refrigerant when the compressor is operating or achieving a 4 inch vacuum under the conditions of AHRI 740. Who must certify recovery equipment used during maintenance, service or repair of small appliances that use CFCs, HCFCs, and HFCs? EQUIPMENT MANUFACTURED AFTER NOVEMBER 15 1993 WHICH IS USED TO RECOVER REFRIGERANT FROM SMALL APPLIANCES FOR THE PURPOSE OF DISPOSAL MUST MEET WHAT STANDARD: THE SALE OF CFC AND HCFC REFRIGERANTS IS:. Products fully manufactured, charged and hermetically sealed in a factory.
Motor vehicle air conditioner (MVAC) means any appliance that is a motor vehicle air conditioner as defined in 40 CFR part 82, subpart B. MVAC-like appliance means a mechanical vapor compression, open-drive compressor appliance with a full charge of 20 pounds or less of refrigerant used to cool the driver's or passenger's compartment of off-road vehicles or equipment. A: 141B B: R-22 C: 141A/141B BLEND D: 134A, WHEN USED SOLDER LESS TYPE PIERCING VALVES THEY SHOULD NOT REMAIN INSTALLED ON SYSTEMS AFTER COMPLETION OF REPAIRS BECAUSE: A: THEY ARE TOO EXPENSIVE TO REMAIN ON EVERY PRODUCT B: THEY TEND TO LEAK OVER TIME C: THEY BECOME LOOSE AND VIBRATE D: BOTH A AND C, IT IS GENERALLY RECOMMENDED THAT PIERCING VALVES BE USED ON WHICH OF THE FOLLOWING TUBING MATERIALS? Major maintenance, service, or repair means any maintenance, service, or repair that involves the removal of any or all of the following appliance components: compressor, condenser, evaporator, or auxiliary heat exchange coil; or any maintenance, service, or repair that involves uncovering an opening of more than four (4) square inches of flow area for more than 15 minutes. Industrial process shutdown means when an industrial process or facility temporarily ceases to operate or manufacture whatever is being produced at that facility. Methods that determine whether the appliance is leaking refrigerant but not the location of a leak, such as standing pressure/vacuum decay tests, sight glass checks, viewing receiver levels, pressure checks, and charging charts, must be used in conjunction with methods that can determine the location of a leak. The outlet area and velocity are 0.01 ft^2 and 100 ft/s, respectively, and the inlet velocity is 50 ft/s. VEHICLES. of R-500, FOR WHICH OF THE FOLLOWING REFRIGERATION SYSTEMS WOULD IT BE PERMISSIBLE TO USE A PASSIVE RECOVERY DEVICE FOR REFRIGERANT RECOVERY? The air velocity is not to exceed 8 m/s to minimize vibration and noise. Self-sealing valve means a valve affixed to a container of refrigerant that automatically seals when not dispensing refrigerant and meets or exceeds established performance criteria as identified in 82.154(c)(2). Class I refers to an ozone-depleting substance that is listed in 40 CFR part 82 subpart A, appendix A. If the rods enter the oven at 30$^\circ{}$C and leave at 700$^\circ{}$C, determine (a) the rate of heat transfer to the rods in the oven and (b) the rate of entropy generation associated with this heat transfer process. IF A RECLAMATION FACILITY RECEIVES A TANK OF MIXED REFRIGERANT THEY MAY: THE SYSTEM-DEPENDANT (PASSIVE) RECOVERY PROCESS FOR SMALL APPLIANCES: A: NEVER NEEDS THE USE OF A PUMP OR HEAT TO RECOVER REFRIGERANT. Normal operating characteristics and conditions means appliance operating temperatures, pressures, fluid flows, speeds, and other characteristics, including full charge of the appliance, that would be expected for a given process load and ambient condition during normal operation. Leak rate means the rate at which an appliance is losing refrigerant, measured between refrigerant charges. B: NEVER BE USED AS A RECOVERY DEVISE IN COMBINATION WITHA PRESSURIZED CONTAINER. One-time expansion device means an appliance that relies on the release of its refrigerant charge to the environment in order to provide a cooling effect.
Process stub means a length of tubing that provides access to the refrigerant inside a small appliance or room air conditioner and that can be resealed at the conclusion of repair or service. What should a technician do if the refrigerant in a recovery cylinder is suspected to be contaminated?
This method is summarized in the following formula: (2) Rolling Average Method. C: VACATE AND VENTILATE THE SPILL AREA D: ALL OF THE ABOVE, REFRIGERANTS IN LARGE QUANTITIES CAN CAUSE SUFFOCATION BECAUSE: A: THEY SMELL STRONG AND MAKE IT HARD TO BREATH B: THEY ARE LIGHTER THAN AIR AND CAUSE DIZZINESS C: THEY ARE HEAVIER THAN AIR AND DISPLACE OXYGEN.
WHEN FILLING A CHARGING CYLINDER, THE REFRIGERANT THAT IS VENTED OFF THE TOP OF THE CYLINDER: A: NEED NOT BE RECOVERED B: NEED ONLY BE RECOVERED IF FILLING WITH A REGULATED REFRIGERANT C: MUST BE RECOVERED REGARDLESS OF THE REFRIGERANT D; NON OF THE ABOVE, WHEN RECOVERING REFRIGERANT FROM A SYSTEM THAT EXPERIENCED A COMPRESSOR BURNOUT, THE TECH SHOULD WATCH FOR SIGNS OF CONTAMINATION IN THE OIL BECAUSE: A: CONTAMINANTS CONNOT BE REMOVED FROM THE REFRIGERANT AND THE REFRIGERANT WILL HAVE TO BE DESTROYED BY THE RECLAMATION CENTER. of R-22 D: a dehumidifier with 7 oz. What can CFC and HCFC refrigerants decompose into at high temperatures (e.g. Which hydrocarbon refrigerant is approved for retrofit into existing household refrigerators? WHEN YOU CHECK SYSTEM PRESSURES TO DETERMINE THE PERFORMANCE OF THE SYSTEM, ITS ALWAYS A GOOD IDEA TO: A: RELEASE A SMALL AMOUNT OF REFRIGERANT TO CHECK FOR CONTAMINATION B: USE EQUIPMENT SUCH AS HAND VALVES OR SELF SEALING HOSES TO MINIMIZE ANY RELEASE. Approved equipment testing organization means any organization which has applied for and received approval from the Administrator pursuant to 82.160. B: CAN BE MIXED WITH R-12 BUT NOT R-22 DURING RECOVERY PROCESS. D: BE USED ALONE AS A SYSTEM DEPENDENT (PASSIVE) RECOVERY DEVICE, IN ORDER TO AVOID REMOVAL OF LIQUID WHEN DRAWING VAPOR FROM A SEAL REFRIGERATION SYSTEM USING A SELF CONTAINED (ACTIVE) RECOVERY DEVICE THAT CANNOT HANDLE LIQUID REFRIGERANT, YOU SHOULD DRAW VAPOR FROM THE: A: CAPILLARY TUBE B: LOW SIDE C: HIGH SIDE. Custom-built means that the industrial process equipment or any of its components cannot be purchased and/or installed without being uniquely designed, fabricated and/or assembled to satisfy a specific set of industrial process conditions. This sector also includes industrial ice machines, appliances used directly in the generation of electricity, and ice rinks. C: OTHERWISE THE COMPRESSOR MAY BE DAMAGED D: BOTH A AND B. Comfort cooling appliances include but are not limited to chillers, commercial split systems, and packaged roof-top units. A: FLOAT DEVICE B: SCALES C: SIGHT GLASS D: THERMISTOR, AFTER INSTALLING AND OPENING A PIERCING VALVE, IF THE SYSTEM PRESSURE IS ____DO NOT BEGIN THE RECOVERY PROCEDURE? Class II refers to an ozone-depleting substance that is listed in 40 CFR part 82 subpart A, appendix B. The following state regulations pages link to this page. A: WHEN THERE IS A LEAK B: WHEN THE COMPRESSOR OPERATES NORMALLY C: WHEN THE COMPRESSOR ONLY RUNS AT HALF SPEED D: WHEN THE COMPRESSOR DOES NOT RUN. Long cylindrical steel rods ($\rho$ = 7833 kg/m^3 and $c_{p}$ = 0.465 kJ/kgK) of 10-cm diameter are heat treated by drawing them at a velocity of 3 m/min through a 7-m-long oven maintained at 900$^\circ{}$C. B: MUST USE A PRESSURE RELEASE DEVICE TO PROTECT THE TECH AND THE EQUIPMENT. A STORAGE CYLINDER OF RECOVERED R-12 AT NORMAL ROOM TEMPERATURE (75*F), IN THE ABSENCE OF NON-CONDENSABLES WILL BE PRESSURIZED TO: A: 30 PSIG B: 75 PSIG C: 150 PSIG D: 200 PSIG, A STORAGE CYLINDER OF RECOVERED R-22 AT NORMAL ROOM TEMPERATURE (75*F), IN THE ABSENCE OF NON-CONDENSABLES WILL BE PRESSURIZED TO: A: 250 PSIG B: 200 PSIG C: 175 PSIG D: 130 PSIG, A STORAGE CYLINDER OF RECOVERED R-500 AT NORMAL ROOM TEMPERATURE (75*F), IN THE ABSENCE OF NON-CONDENSABLES WILL BE PRESSURIZED TO: A: 30 PSIG B: 75 PSIG C: 95 PSIG D: 120 PSIG, WHICH CONDITIONS CAN CAUSE EXCESSIVE PRESSURE CONDITIONS ON THE HIGH SIDE OF A SELF-CONTAINED (ACTIVE) RECOVERY DEVICE? They can be either manually closed or automatically closed when disconnected to prevent loss of refrigerant from hoses. High-pressure appliance means an appliance that uses a refrigerant with a liquid phase saturation pressure between 170 psia and 355 psia at 104 F. Apprentice means any person who is currently registered as an apprentice in maintenance, service, repair, or disposal of appliances with the U.S. Department of Labor's Office of Apprenticeship (or a State Apprenticeship Council recognized by the Office of Apprenticeship).
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