Two Technicians Are Describing High- and Low-Pressure Exhaust Gas Recirculation

Multiple Choice

Two technicians are describing high- and low-pressure exhaust gas recirculation systems. Technician A says that non-cooled, high-pressure EGR flow dominates at low speed, low load conditions and transitions to more flow from the cooled, low-pressure EGR circuit. Technician B says that with an air intake throttle located downstream or after the EGR valve, the throttle plate can open and close to change the pressure differential. Who is right?

A) A only"
B) B only"
C) Both A and B
D) Neither A nor B"