Which component of CFC refrigerant is the cause of ozone depletion? A. Chlorine B. Fluorine C. Carbon D. All of the Above - (correct Answer) - A. Chlorine The Stratospheric Ozone layer protects us from; A. Polar Inversion B. Chlorine Monoxide C. Ultraviol

Which component of CFC refrigerant is the cause of ozone depletion? A. Chlorine B. Fluorine C. Carbon D. All of the Above - (correct Answer) - A. Chlorine The Stratospheric Ozone layer protects us from; A. Polar Inversion B. Chlorine Monoxide C. Ultraviolet Radiation D. Gamma Rays - (correct Answer) - C. Ultraviolet Radiation The current standard for recovery only equipment is SAE; A. J2210 B. J2810 C. J1732 D. J2788 - (correct Answer) - B. J2810 When checking a cylinder of recycled HFC-134a for non-condensable gasses at 70F, the pressure should not exceed: A. 50 PSIG B. 76 PSIG C. 90 PSIG D. 134 PSIG - (correct Answer) - 76 psig Section 609 of the Federal Clean Air Act requires that all persons servicing motor vehicle air conditioning must; A. Use EPA approved equipment B. Be certified in recovery procedures C. Never intentionally vent refrigerant D. All of the Above - (correct Answer) - D. All of the Above Recovery cylinders must be; A. 30 lb. capacity B. SAE approved C. White in color D. UL or DOT approved - (correct Answer) - D. UL or DOT approved After charging a system using manifold gauges, the refrigerant in the hoses; A. Can be vented B. Must be recovered C. Is disregarded D. None of the Above - (correct Answer) - B. Must be recovered Violations of Section 609 of the Clean Air Act may result in; A. $27,500 fine per violation B. Loss of technician certification C. An appearance in Federal Court D. All of the Above - (correct Answer) - D. All of the Above After initial recovery procedures, the technician should; A. Disconnect the recovery equipment B. Add some refrigerant and leak test C. Replace any failed components D. Wait 5 minutes to determine if the system returns to a positive pressure - (correct Answer) - D. Wait 5 minutes to determine if the system returns to a positive pressure After initial recovery procedure, if additional recovery is required, repeat the recovery process until the A/C system vacuum remains stable for; A. 30 seconds B. 30 minutes C. 2 minutes D. 1 hour - (correct Answer) - C. 2 minutes Before retrofitting a motor vehicle air conditioning system, make sure that the replacement refrigerant is: A. Readily available B. HCFC-22 C. EPA - SNAP approved D. A blend - (correct Answer) - C. EPA - SNAP approved Before charging a system with recycled refrigerant, the refrigerant should be checked for; A. Phosphene gas B. Acids C. Chlorine Monoxide D. Non-condensables - (correct Answer) - D. Non-condensables Service hoses must have ________ within 12" (30cm) of the end of the hose. A. Shrader Depressors B. DOT tags C. Shut off valves D. Color codes - (correct Answer) - C. Shut off valves When disposing of an empty or near empty disposable cylinder, you should; A. Attach the cylinder to the recovery unit B. Reduce the cylinder to a vacuum C. Mark the cylinder empty D. All of the above - (correct Answer) - D. All of the above Prior to introducing recovered refrigerant to a motor vehicle; A. Add oil to the system B. Leak test the system C. Recycle the refrigerant to SAE standards (J1991 or J2099) D. Evacuate the system - (correct Answer) - C. Recycle the refrigerant to SAE standards (J1991 or J2099) Refrigerant must not be vented because; A. It is illegal B. It is expensive C. It depletes the ozone layer D. All of the above - (correct Answer) - D. All of the above Before transferring recycled refrigerant into an empty storage cylinder, the cylinder should first be; A. Washed with strong detergent B. Stored in direct sunlight to dry C. Measured with a thermometer D. Evacuated to at least 27" hg - (correct Answer) - D. Evacuated to at least 27" hg One kilogram is equal to; A. 5/8th of a pound B. 32 ounces C. 1.8 pounds D. 2.2 pounds - (correct Answer) - D. 2.2 pounds Recycling equipment manufactured to SAE standards is capable of cleaning refrigerants to an acceptable level; A. From any type of refrigerants to an acceptable level B. Only if it came from a motor vehicle C. But can not remove moisture D. But can not remove oil - (correct Answer) - B. Only if it came from a motor vehicle Recovery cylinders must not be filled above 80% of their capacity and the safe filling capacity can be controlled by; A. Mechanical float devices B. Electronic shut-off C. Weight (scales) D. Any of the above - (correct Answer) - D. Any of the above When servicing a vehicle charged with HFC-134a, you should; A. Retrofit the vehicle to use CFC-12 B. Mix CFC-12 with HFC-134a C. Use the same equipment as CFC-12 D. Use equipment designed for use with HFC-134a - (correct Answer) - D. Use equipment designed for use with HFC-134a Before charging a system that has been opened for service; A. Add a full charge of refrigerant B. Flush the system C. The system should hold 27" vacuum for at least one minute before charging D. Pressurize the system with air - (correct Answer) - C. The system should hold 27" vacuum for at least one minute before charging Refillable cylinders used to transport recovered refrigerants; A. Must be DOT approved B. Must be properly labeled and tagged C. Must be hydrostatically tested every 5 years D. All of the above - (correct Answer) - D. All of the above When a leak is found in an automotive air conditioning system; A. The EPA does not require leak repair B. Leak repair is mandatory in some states C. Repair leaks whenever possible D. All of the above - (correct Answer) - D. All of the above Depletion of the ozone layer causes: A. Skin cancer B. Eye disease C. Crop loss D. All of the above - (correct Answer) - D. All of the above The only accurate method of charging is to; A. Charge until the sight glass is clear B. Charge until gauge pressures are correct C. Weigh the refrigerant into the system D. Charge as a vapor with the engine running - (correct Answer) - C. Weigh the refrigerant into the system Which of the following refrigerant has the lowest GWP? (Global Warming Potential) A. R410a B. R134a C. R152a D. R744 - (correct Answer) - D. R744 (1 GWP) All devices used to recover/recycle refrigerant must; A. Be portable B. Contain a heavy duty pump C. Meet EPA standards D. All of the above - (correct Answer) - D. All of the above The lubricant used with HFC-134a is; A. Mineral oil B. PAG or POE (Ester) oil C. Alkybenzene oil D. Whale oil - (correct Answer) - B. PAG or POE (Ester) oil In which model year will HFC-134a be unacceptable in new light-duty vehicles; A. 2017 B. 2021 C. 2023 D. 2025 - (correct Answer) - B. 2021 NEVER expose CFC-12 to open flame because they may form; A. Hydrochloric acid B. Hydrofluoric acid C. Phosgene gas D. All of the above - (correct Answer) - D. All of the above Definition of RECOVER: A. Remove refrigerant in any condition, from a system, and store it in an external container. B. Process refrigerant to a level equal to new product specs C. Clean refrigerant for reuse by oil separation and passes through moisture absorbing device D. Remove refrigerant from shop for disposal - (correct Answer) - A. Remove refrigerant in any condition, from a system, and store it in an external container. When operating recovery or recycling equipment, you should: A. Wear safety glasses B. Wear protective gloves C. Follow all safety precautions for the equipment D. All of the above - (correct Answer) - D. All of the above Definition of RECYCLE A. Process refrigerant to a level equal to new product specs B. Remove refrigerant in any condition, and store it in an external container. C. Clean refrigerant for reuse by oil separation and passes through moisture absorption device D. Remove refrigerant from shop for disposal - (correct Answer) - C. Clean refrigerant for reuse by oil separation and passes through moisture absorption device Definition of RECLAIM: A. Process refrigerant to a level equal to new product specs, as determined by chemical analysis B. To remove refrigerant in any condition, and store it in an external container without necessarily testing C. Clean refrigerant for reuse by oil separation and passes through moisture absorption device D. Remove refrigerant from shop for disposal - (correct Answer) - A. Process refrigerant to a level equal to new product specs, as determined by chemical analysis Failure of a system to hold a vacuum concluding the evacuation process indicates that; A. The system is ready to be charged B. A leak in the system may exist C. The system has been adequately evacuated D. The oriface tube is plugged - (correct Answer) - B. A leak in the system may exist Under what conditions may you use a disposable cylinder to recover refrigerant? A. When the system contains the same refrigerant as the cylinder B. Only in an emergency C. Never D. When the system contains less than 5 lbs. of refrigerant - (correct Answer) - C. Never A refrigerant oil that is hygroscopic A. Is a good lubricant B. Has a high affinity for water C. Is crude oil and unrefined D. Can be left open to the ambient air - (correct Answer) - B. Has a high affinity for water Recovery of refrigerants is necessary for; A. Adequate supplies for service after production bans B. Prevention of venting to the atmosphere C. Prevention of stratospheric ozone depletion D. All of the above - (correct Answer) - D. All of the above An award of up to _____ may be paid to a person supplying information that leads to a penalty against a technician who is intentionally venting? A. $5,000 B. $50,000 C. $25,000 D. $10,000 - (correct Answer) - D. $10,000 When retrofitting a CFC-12 system to HFC-134a; A. Replace the accumulator drier with one that contains an Xh-7 or Xh-9 desiccant B. Affix HFC-134a label to the system C. Recover any remaining CFC-12 D. All of the above - (correct Answer) - D. All of the above 2. Recycling equipment that shares a common refrigerant circuit for both CFC-12 and HFC-134a, must be certified to _________standard. A. SAE J1989 B. SAE J1990 C. SAE J170 D. None of the above - (correct Answer) - C. SAE J170 R152a has a GWP of; A. 1,300 B. 1 C. 120 to 140 D. 1,925 - (correct Answer) - C. 120 to 140 The proper method of charging a blended refrigerant is in the; A. Vapor phase B. Liquid phase C. Closed position D. Open position - (correct Answer) - B. Liquid phase A high compression ratio may result in; A. Compressor failure B. Moisture in the system C. Less strain on the compressor D. Orifice tube clogging - (correct Answer) - A. Compressor failure A gauge pressure of ______psi is required during leak testing. A. 20 B. 50 C. 80 D. 90 - (correct Answer) - B. 50 The Montreal Protocol is; A. An international treaty controlling CFC's & HCFC's B. A set of rules governing etiquette C. A method to determine ozone levels D. A mandated procedure for the recovery of refrigerants - (correct Answer) - A. An international treaty controlling CFC's & HCFC's One chlorine atom in the stratosphere can destroy up to _______ ozone molecules. A. 100 B. 1,000 C. 10,000 D. 100,000 - (correct Answer) - D. 100,000 Which of the following is considered to be a good service practice? A. Repair leaks whenever possible B. Recover and recycle refrigerant C. Determine the type of refrigerant in the system before recovery D. All of the above - (correct Answer) - D. All of the above Never inhale refrigerant vapors or mist in high concentrations because: A. They may cause melanoma B. They may lower your body temperature C. They may cause heart irregularities or unconsciousness D. They are poisonous - (correct Answer) - C. They may cause heart irregularities or unconsciousness