| A | B |
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| A "small appliance" is defined as an appliance typically charged at the factory with ___________ of refrigerant. | five pounds or less |
| Examples of small appliances are: room air conditioners, packaged terminal heat pumps, dehumidifiers, under the counter ice machines and _____________. | vending machines and drinking water coolers. |
| A certified Type I technician must understand how to use a __________. | temperature-pressure chart (T/P). |
| All other appliances that use a CFC or HCFC refrigerant as coolant are defined as _________, | "appliance" |
| Service hoses must be filled with some tpe of __________ on each hose to prevent loss of refrigerant. | low-loss fitting (shut-off valve) |
| All appliances must be equipped with a service aperture or other device for ___________ refrigerant from the appliance. | adding or removing |
| The service port for small appliances is typically a straight piece of tubing that is entered using a ____________. | piercing access valve. |
| Before any refrigerant is reused in a Type I appliance, it should be checked for ___________. | non-condensables. |
| When making a temperature and pressure comparison to check for non-condensables, pressure in the container should read ____________ of the pressure shown on the T/P chart. | within a few degress |
| A temperature and pressure comparison should be made after the container has been ________. | stabilized |
| HFC134a is a replacement for CFC-12 in ___________. | household refrigerators |
| To date, there is no ________ replacement for CFC-12. | "drop-in" |
| ________ CFC and HFC refrigerants should be recovered with current recovery devices. | Only |
| Regulations permit nitrogen and its trace refrigerant to be vented during ______________. | pressurization and purging operations. |
| Any person who opens an appliance for maintenance, service, or repair must have at least one self-contained recovery machine available at their place of business unless ______________. | this person is working on a small appliance. |
| Repair of leaks in small appliances is ___________, but leaks should be repaired whenever possible. | not required |
| MVAC system are not classified as ___________. | Type I appliance |
| Passive (system dependent) recovery devices may be used to recover refrigerant from a __________. | domestic refrigerator |
| All recovery and recycling machines manufactured _____________ must be certified to meet EPA requirements. | after November 15, 1993 |
| All recovery devices manufactured ____________ for use with small appliances must certify to the EPA that the equipment is capable of removing _________ of refrigerant whether or not the compressor is operating or achieving a 4 inch vacuum. | before November 15, 1993, 80% |
| Small appliance recovery equipment manufactured after Nov 15, 1993 must be certified to be capable of recovering ________ of the refrigerant when the compressor is operating or achieving a 4 inch vacuum. | 90% |
| Recovery equipment manufactured after Nov. 15, 1993 used to recover refrigerant for __________________ must be able to recover 80% of the refrigerant if the compressor is inoperative or 90% if the compressor is operative. | the purpose of disposal |
| The EPA requires the certification of all technicians who service Type I air conditioning and refrigeration equipment that _________________ as a refrigerant. | uses a CFC or HCFC |
| If EPA regulations change after a technician becomes certified, it will be the ___________ to comply with any future changes in the law. | technician's responsibility |
| After _____________,only technicians certified by an EPA approved certifying agency are permitted to _________ refrigerant in any size container. | November 14, 1994, buy |
| Any regulated refrigerant released while charging a _______________ must be recovered. | graduated charging cylinder |
| Before any recovery is started, the equipment must first be checked to be sure which ___________ is being used. | refrigerant |
| The ___________ should provide the name of the refrigerant being used. | equipment dataplate |
| A vacuum pump could be used as a recovery machine, but it is _________. | highly unlikely |
| A vacuum pump can be used as a recovery machine if it is certifiable and _________________. | connected to a non-pressurized recovery container |
| The system dependent recovery process, which captures refrigerant in a non-pressurized container, can be used on a system whose compressor is ________. | NOT operating |
| A ____________ connection to the ________ side is used on a system whose compressor _______ operating. | SINGLE, high, IS |
| If a system dependent recovery proces is used on a system with an inoperative compressor, the recovery hoses should be connected ______________. | to BOTH the high and low side fittings |
| The recovery container must always be __________. | standing upright and free of non-condensables |
| A recovery container that is not properly evacuated or one that has an unopened inlet valve will cause ___________. | excessive recovery machine discharge pressure |
| A recovery machine will maintain a _____________ on a system as all refrigerant within it ____________. | low-pressure, vaporizes |
| Compressors must be _________________ to help free entrapped refrigerant. | heated and struck with a rubber mallet |
| _____________ should be turned on where possible to further speed up refrigerant release from the system oil, especially when using system dependent recovery with a non-operating compressor.. | Defrost heaters |
| On an appliance that uses a captube and the captube becomes restricted, all ________ can be forced into the _________________. | LIQUID, HIGH side condenser |
| Under no circumstance should different refrigerants be __________/ | mixed together |
| A reclamation facility that receives a tank of mixed refrigerant may either ________________. | refuse to process the refrigerant and return it at the owner's expense or agree to destroy the refrigerant for a substantial fee. |
| When recovering different refrigerants, they must be placed ______________. | in recovery vessels containing the same type of refrigerant |
| Recovery cylinders must be Department of Transportation (DOT) approved for use as a recovery cylinder and should be colored ___________. | gray with a yellow top |
| Refillable cylinders (DOT or UL approved) used for transport of recovered pressurized refrigerant must meet the requirements of _____________. | the Code of Federal Regulation title 49 (Parts 100-177) |
| Properly completed shipping paperwork should be included with a cylinder being ___________. | transported to a reclaimer |
| Recovery devices should be checked with a _______________ on a daily basis. | refrigerant leak detector |
| Temporary fitting should only be installed on _____________ and should be leak tested before proceeding with recovery. | copper or aluminum lines |
| Temporary fittings must be ___________ after the repair to prevent leaks. | removed |
| Fill-limit devices, often a part of the recovery machine, include _______________. | floats, thermistor-type sensors, and weighing scales |
| To avoid spilling liquid refrigerant on the skin, wear ___________ when connecting or disconnecting hoses. | butyl-lined gloves and safety glasses |
| If system pressure reads "O psig" a ___________ is indicated and recovery procedures should ____________. | leak, should not be started |
| If a system is opened and a pungent odor is detected, it might mean acids are present due to a compressor burnout and a ______________ might be required. | tubing flushing |
| Be on guard for ____________. | refrigerant leaks |
| Refrigerants are heavier than air and can replace air in a confined space leading to __________. | suffocation (asphyxiation) |
| Oxygen starvation is the leading cause of __________ in accidents involving refrigerants. | death |
| A _______________ must be worn any time one enters a room where a large leak has occurred. | Self-Contained Breathing Apparatus (SCBA) |
| If a large leak has occurred and no SCBA is available, ____________. | ventilate the space and leave the area. |
| If a system is not fully evacuated, compressor head pressure can rise and the reamining moisture will combine under heat with refrigerant and oil to form _____________. | hydrofluoric and hydrochloric as phosegene gas |
| DOT regulations require shipping papers to show the ____________. | total number of cylinders of each gas |
| When repairing a Type I appliance, nitrogen should be used during ___________, and the nitrogen tank should be equipped with a __________. | brazing operations, regulator |
