ScienceEngineeringMacsw Air Conditioning Certification Test
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Macsw Air Conditioning Certification Test

Williamina Hughes avatar Williamina Hughes
25 July 2022
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25 test answers

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