Two Technicians Are Discussing How Excessive Valve Overlap Affects a Turbocharged

Multiple Choice

Two technicians are discussing how excessive valve overlap affects a turbocharged engine. Technician A says that a turbocharger operates on backpressure in the exhaust. Technician B says that if the turbo operates at too low an rpm, backpressure can flow through the open exhaust valve into the intake air stream, limiting boost pressure into the cylinder. Who is right?

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