FCC HVAC Study Guide Questions And Answers

FCC HVAC Study Guide Questions And Answers what is the name of EPA's program that identifies refrigerants with lower overall risks to human health and the environment? - ANSWER- the Significant New Alternatives Policy(SNAP) Program. what is a lawful use of HCFC-22? - ANSWER- Charging any new system designed for R-407c. how does cooling occur in a direct expansion vapor compression refrigeration system? - ANSWER- when the liquid refrigerant is vaporized. which process applies to cleaning refrigerant for immediate reuse by oil separation and single or multiple passes through devices like replaceable core filter driers which reduce moisture and acidity? - ANSWER- recycling what should the technician review when working with any solvents chemicals or refrigerants? - ANSWER- safety data sheets (SDS). in general which elastomers for use in seals and gaskets are NOT compatible with HFO refrigerants? - ANSWER- none new household refrigerators may NOT be factory charged with? - ANSWER- R-600a a standard vacuum pump designed for evacuation and dehydration can... - ANSWERbe used alone as a system dependent recovery device. which condition requires accessing both the high and low side of the system for refrigerant recovery. - ANSWER- when the compressor does not run. after installation of a field piped split system the unit should first be pressurized with... - ANSWER- nitrogen and leak checked. which leak repair category does the EPA define as the refrigeration appliances used in the retail food cold storage warehouse sectors? - ANSWER- industrial process refrigeration (IPR) when recovery is first started at what phase is the refrigerant removed to save recovery time? - ANSWER- the liquid phase how can you speed up the removal of the refrigerant charge from a system? - ANSWER- cooling the recovery cylinder to lower its pressure.