ATE 151 Final Exam Questions & Answers 2024/2025
Tech A says that all HFC-134a uses the same refrigerant oil. Tech B says that refrigerant oil, regardless of type, must be kept in a sealed container to keep it from absorbing moisture from the air. Who's right? - ANSWERSTech B
A front wheel ...
Tech A says that all HFC-134a uses the same refrigerant oil. Tech B says that refrigerant oil, regardless of
type, must be kept in a sealed container to keep it from absorbing moisture from the air. Who's right? -
ANSWERSTech B
A front wheel drive vehicle has broken a condenser line. What other vehicle component may also be
defective that could have caused the condenser line to break? - ANSWERSEngine Mounts
Hot coolant is circulated through the ________ to warm the vehicle interior. - ANSWERSHeater core
When heating a substance, latent heat is _______ - ANSWERSThe heat added to cause a change of state
while the temperature stays the same.
A thermal expansion valve has a ______ orifice, whereas an orifice tube uses a ______ orifice to control
refrigerant flow. - ANSWERSVariable; Fixed
In which component is heat added to refrigerant? - ANSWERSThe evaporator
Where in the air conditioning system is the refrigerant a low pressure gas? - ANSWERSEvaporator outlet
What is the purpose of the expansion device located at the evaporator inlet? - ANSWERSMeters correct
refrigerant flow to evaporator and provides a restriction to create pressure in the high side
On a TXV system, the temperature sensing bulb is located at the ______ - ANSWERSEvaporator outlet
The material used to absorb moisture inside the air-conditioning system is called _______ -
ANSWERSDesiccant
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