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Question:

During each vacuum decay test, it is observed that after creating the vacuum, the pressure of the system increases to greater than 0 psig and stops at some point, Then:

A The refrigerant could be trapped in the system
Explaination

If system has leak, the pressure increases to 0 psig (atmospheric pressure) and stops. If the pressure is greater than 0 psig and stops at some point means refrigerant or water is still evaporating in the system.