Textbook Problem

While discussing EVAP testing: Technician A says that most OEMs recommend that clean, high-pressure shop air be used to pressurize the system to test for leaks. Technician B says that nitrogen is typically used to drive the smoke through the system when checking the system with a smoke machine. Who is correct?

a. Technician A only

b. Technician B only

c. Both A and B

d. Neither A nor B