MACS Certification 2024 Exam Marking Scheme 100% Correct

MACS Certification 2024 Exam Marking Scheme 100% Correct If the mechanic's gauges rise from a vacuum to pressure, what is required? - Answer- Additional recovery What is the only way to fully clear moisture from the A/C system? - Answer- Replacing the desiccant Pressure ______ the boiling point - Answer- Raises Vacuum _______ the boiling point - Answer- Lowers What should you do when replacing hoses? - Answer- Make sure you have the correct type/size of tubing What does GWP stand for? - Answer- Global Warming Potential CO2 is equal to what A/C system? - Answer- R-744 HFO-1234yf systems are acceptable in what kinds of vehicles? - Answer- 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? - Answer- Heavy- duty trucks, refrigerated transport, and off-road vehicles such as farm equipment HFO-1234yf is classified by ASHRAE as what? - Answer- A2L- mildly flammable R-744 systems operate at ___ to ___ times higher than HFC-134a and HFC-152a systems. - Answer- 5 to 10 HFC-152a is ___ - Answer- flammable