Technician A says that a late-model engine equipped with a VGT will close the vanes to increase intake boost and exhaust backpressure during braking. Technician B says the vanes will open to reduce intake airflow during engine braking. Who is correct?
A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct. A Variable Geometry Turbocharger (VGT) can close the vanes to increase exhaust backpressure and intake boost, which enhances engine braking by increasing resistance against the pistons.

Technician a Says That a Late-Model Engine Equipped with a VGT