macsw air conditioning certification test fully solved & updated

what is not identified in the manual as a concern with field coupled hoses - answer-length of hose on effect of some refrigerant gases in the atmosphere is that they - answer-contribute to trapping heat when should recycling equipment filters be changed - answer-according to equipment manufactures specifications select the statement that best describes the chemical and operating characteristics of HFO1234yf - answer-HFO1234yf is similar to, but not the same as,HFC134a why must recycled refrigerant be checked for air - answer-to avoid performance loss, system damage it is not recommended by the US EPA, but adding refrigerant to a leaking system is - answer-permitted, unless local or state laws prohibit it which of the following is unlikely to affect refrigerant charge accuracy - answer-the A/C compressor is it acceptable and legal to vent HFC-134a - answer-no which of the following is not a factor in how much refrigerant can be recovered from an A/C system - answer-the age of the vehicle which type of tank must be used during the transfer of refrigerant - answer-tanks marked DOT 4BA when using an hfc134a refrigerant recovery machine after completing the first recovery process how long must you wait, then check the machines gauges for a rise in pressure above vacuum which would indicate that the system still contains some refrigerant - answer-5 minutes what can happen if refrigerant storage tank is overfilled - answer-tank may explode which air conditioning components must be approved or certified for use in an HFO1234yf system - answer-evaporators paid technicians who service or repair mobile A/C systems using HCFC-22 as refrigerant or service cargo refrigerant equipment - answer-must be section 608 type ii certified what was a key design change for HFC-134a A/C systems versus CFC-12 A/C systems - answer-increased condenser capacity and airflow mobile A/C system design changes new service procedures and equipment have been developed for what reason - answer-to reduce lifetime refrigerant emissions HFC-134a has a global warming potential of - answer-1430 the transportation industry is moving to new refrigerants that have lower - answer-global warming potential if a large amount of lubricant is removed from a system during refrigerant recovery - answer-the system likely contained too much lubricant proper way to recharge system - answer-remove charge,evacuate system, add correct amount of refrigerant CFC-12 recovery equipment has SAE 3/8 inch service fittings. HFC-134a recovery equipment has - answer-quick couple design when can HFC134a become combustable in a mobile air conditing system - answer-if shop air is used in the system in an attempt to check for leaks and HFC134a is present when it has been determined that an A/C system has a low refrigerant charge, what should be done - answer-perform a leak detection procedure what is the advantage of using refrigerant identification equipment - answer-allows the ability to determine what type of refrigerant is in system which of the following statements is correct about flushing A/C systems - answer-flushing solvents may remain in A/C systems causing problems