MACS CERTIFICATION EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
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Course
MACS CERTIFICATION E
Institution
MACS CERTIFICATION E
If the mechanic's gauges rise from a vacuum to pressure, what is required? - ACCURATE ANSWERS Additional recovery
What is the only way to fully clear moisture from the A/C system? - ACCURATE ANSWERS Replacing the desiccant
Pressure ______ the boiling point - ACCURATE ANSWERS Raises
Vacuum ...
MACS CERTIFICATION EXAM
MACS CERTIFICATION EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
If the mechanic's gauges rise from a vacuum to pressure, what is required? -
ACCURATE ANSWERS✔✔ Additional recovery
What is the only way to fully clear moisture from the A/C system? - ACCURATE
ANSWERS✔✔ Replacing the desiccant
Pressure ______ the boiling point - ACCURATE ANSWERS✔✔ Raises
Vacuum _______ the boiling point - ACCURATE ANSWERS✔✔ Lowers
What should you do when replacing hoses? - ACCURATE ANSWERS✔✔ Make
sure you have the correct type/size of tubing
What does GWP stand for? - ACCURATE ANSWERS✔✔ Global Warming
Potential
, CO2 is equal to what A/C system? - ACCURATE ANSWERS✔✔ R-744
HFO-1234yf systems are acceptable in what kinds of vehicles? - ACCURATE
ANSWERS✔✔ 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? - ACCURATE
ANSWERS✔✔ Heavy-duty trucks, refrigerated transport, and off-road vehicles
such as farm equipment
HFO-1234yf is classified by ASHRAE as what? - ACCURATE ANSWERS✔✔
A2L- mildly flammable
R-744 systems operate at ___ to ___ times higher than HFC-134a and HFC-152a
systems. - ACCURATE ANSWERS✔✔ 5 to 10
HFC-152a is ___ - ACCURATE ANSWERS✔✔ flammable
What are the 2 types of HFC-152a systems? - ACCURATE ANSWERS✔✔ Direct
expansion and secondary loop type
Direct Expansion - ACCURATE ANSWERS✔✔ Refrigerant directly expands
within the evaporator that is located inside the passenger compartment
Secondary Loop (Open Loop) - ACCURATE ANSWERS✔✔ A circulating non-
flammable fluid replaces the evaporator which provides isolation between the
flammable refrigerant and the passenger compartment
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