After Two Technicians Had Listened to the Noise Made by a VGT

After two technicians had listened to the noise made by a VGT when the key was switched on but before starting the engine, Technician A said the noise was the actuator moving to a default spring-loaded position after it had been shut down in a wide-open position. Technician B said the turbocharger actuator was relearning maximum and minimum actuator sweep positions during a self calibration process. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Correct Answer:

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