While pressure testing an isolated Cummins charge air cooler (CAC), the pressure drops from 30 psi to 25 psi in 15 seconds. Technician A says that the CAC is leaking air. Technician B says that the pressure drop-off is within specification and the CAC can be returned to service. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B.
Answer: C
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