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MACS Certification Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions CA$19.42   Add to cart
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MACS Certification Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions
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MACS Certification Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

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  • August 8, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • macs certification exam questions answers 100

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MACS Certification Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025
Comprehensive Questions A+ Graded Answers | With Expert Solutions


If the mechanic's gauges rise from a vacuum to pressure, what is required? - Additional recovery



What is the only way to fully clear moisture from the A/C system? - Replacing the desiccant



Pressure ______ the boiling point - Raises



Vacuum _______ the boiling point - Lowers



What should you do when replacing hoses? - Make sure you have the correct type/size of tubing



What does GWP stand for? - Global Warming Potential



CO2 is equal to what A/C system? - R-744



HFO-1234yf systems are acceptable in what kinds of vehicles? - Passenger cars, light-duty trucks,
medium-duty passenger vehicles, heavy-duty pickup trucks, and complete heavy-duty vans



HFO-1234yf systems are not acceptable in what kinds of vehicles? - Heavy-duty trucks, refrigerated
transport, and off-road vehicles such as farm equipment



HFO-1234yf is classified by ASHRAE as what? - A2L- mildly flammable



R-744 systems operate at ___ to ___ times higher than HFC-134a and HFC-152a systems. - 5 to 10



HFC-152a is ___ - flammable



What are the 2 types of HFC-152a systems? - Direct expansion and secondary loop type

, Direct Expansion - Refrigerant directly expands within the evaporator that is located inside the
passenger compartment



Secondary Loop (Open Loop) - A circulating non-flammable fluid replaces the evaporator which provides
isolation between the flammable refrigerant and the passenger compartment



Section 609 of the Clean Air Act gives the EPA authority to do what? - Establish standards and
requirements regarding the servicing of mobile A/C systems



What/who establishes standards specifically for the service of motor vehicle air conditioning systems
(MVAC's)? - Section 609 of the Clean Air Act



How many categories of the Section 608 Certification are there? - 4 types



What are the 4 categories of Section 608 of the Clean Air Act? - 1.) Small Appliances, 2.) High Pressure
Appliances, 3.) Low Pressure Appliances, and 4.) All Appliances except MVACs



What type of Section 608 is Section 609 similar too? - Type 2



Busses and other vehicles using HCFC-22 are not considered MVACs. What are the classified as? - High
Pressure Vehicles under Section 608 type 2



DIY jobs are not required to be certified, but what are they required to use? - Proper equipment



Who is the owner of recovery/recycling equipment required to inform? - The EPA



Who is responsible for keeping the certification on file? - The shop owner



How long should records be kept? - 3 years

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