FCC HVAC Study Guide Questions And Answers Verified 100% Correct

FCC HVAC Study Guide Questions And Answers Verified 100% Correct what type of lubricants are HFO refrigerants miscible in? - ANSWER- POE lubricants. what does ozone in the stratosphere above the earth consist of? - ANSWER- molecules containing 3 oxygen atoms? what are the characteristics of HCFC's and CFC's make them more likely to reach the stratosphere than most other compounds containing chlorine? - ANSWER- they do not dissolve in water or easily break down in the atmosphere. which refrigerant does not contain chlorine? - ANSWER- R-134A from which of the following does the ozone layer protect the earth? - ANSWER- ultraviolet radiation from the sun. the date when the production of new R-22 in the U.S ends is? - ANSWER- 2020 which of the following is considered an unacceptable release of CFC,HCFC,or HFC refrigerant? - ANSWER- during theft or vandalism of equipment. in which of the following scenarios can refrigerant be vented? - ANSWER- releasing isobutane from a household freezer. which of the following is a high pressure refrigerant under Epa's refrigerant recycling regulations? - ANSWER- R-410A what is a ternary blend refrigerant? - ANSWER- a three part mixture. which of the following is not a refrigerant? - ANSWER- a leak trace gas. you have to leak check a unit that has lost a complete charge. what gas would cause the least damage to the environment? - ANSWER- dry nitrogen. what is required on all recovery equipment? - ANSWER- an EPA approved certification label. the piping connection to the vacuum pump should be... - ANSWER- as short in length and as wide in diameter as possible. what is the EPA's definition of a small appliance? - ANSWER- products fully manufactured charged and hermetically sealed in a factory. which hydrocarbon refrigerant is approved for retrofit into existing household refrigerators? - ANSWER- hydrocarbons are not approved for retrofit applications. who must certify recovery equipment used during maintenance service or repair of small appliances? - ANSWER- an EPA approved laboratory. the sale of CFC,HCFC,HFC and HFO refrigerants to service or install refrigeration and air conditioning equipment is... - ANSWER- restricted to technicians who are EPA certified in refrigerant recovery. which of the following best describes how low loss fittings on refrigerant recovery devices used to recover CFC's,HCFC's and HFC's? - ANSWER- they can be manually closed or automatically closed when disconnected to prevent loss of refrigerant from hoses. what type of appliances are technicians certified to charge and open after passing type one. - ANSWER- appliances containing 5 pounds or less of refrigerant that have been hermetically sealed and charged at a factory. EPA section 608 rules require capture of 80% of the HFC's and HCFC's from a small appliance sealed system with a non operating compressor if the technicians are using... - ANSWER- a self contained (active) recovery process. for which of the following refrigeration systems/appliances would it be permissible to use a passive recovery device for recovery of CFC's,HCFC's and HFC's? - ANSWER- a domestic refrigerator. what is the maximum allowable factory charge of refrigerant for type one appliances using CFC's,HFC's and HCFC's? - ANSWER- 5 pounds. which of the following is an applicable method or device presently used for monitoring the 80% fill level in a recovery tank? - ANSWER- refrigerant scale or tank internal float device. after installing and opening a piercing access valve the recovery procedure cannot begin if the system is at what pressure? - ANSWER- 0 psig which of the following is a true statement regarding a refrigerant that can be used as a direct service drop in substitute for R-22? - ANSWER- there is no such thing as a drop in substitute. which recovery equipment maintenance practice should be preformed on a regular basis? - ANSWER- check recovery device for refrigerant leaks. when a pungent Oder is detected during a sealed system recovery and/or repair which of the following is most likely? - ANSWER- a compressor burnout has occurred. after recovering refrigerant from a sealed system if nitrogen is used to pressurize or blow debris out of the system the nitrogen... - ANSWER- may be vented to the ambient air. which refrigerants can be mixed in a appliance? - ANSWER- refrigerants cannot be mixed. 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? - ANSWER- only one access valve on the high side of the system what may be done to speed the recovery process and ensure that all CFC,HCFC or HFC refrigerant has been removed from a frost free refrigerator? - ANSWER- turn on the defrost heater to increase the refrigerants temperature and vaporize any liquid. what is a recommended safe work practice when recovering refrigerant? - ANSWER- safety eye-wear and butyl-lined gloves. when using nitrogen in repairing a sealed refrigeration system what should the nitrogen tank always be equipped with? - ANSWER- regulator what gases can CFC and HCFC refrigerants decompose into at high temperatures? - ANSWER- phosgene gas permanent safety markings are NOT required on which of the following areas on household refrigerators using HC refrigerants? - ANSWER- on the inside of the refrigerator door. which part of a belt driven non hermetic compressor is most likely to leak if the compressor has not been used for several months? - ANSWER- rotating shaft seal a company uses a chiller that diverts 55% of its cooling capacity to one of its manufacturing lines and 45% of its cooling capacity to air conditioning for the office space. which leak rate category would this chiller be in? - ANSWER- industrial process refrigeration.