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NATE Practice Exam with correct answers 2024
A suction line accumulator should be used in a residential heating pump only when recommended by the manufacturer if: 
 
a. Long refrigerant lines increase system charge over recommended maximum charge 
 
b. added oil dilution is required to maintain proper lubrication 
 
c. the system has low vapor line pressure drop and accumulator is added to improve efficiency 
 
d. the system does not include a high pressure switch or time delay correct answers A. Long refrigerant lines increase system c...