While having a discussion, Technician A says that dry black soot at the exhaust pipe indicates an overly rich air-fuel mixture. Technician B says that it indicates oil consumption. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Dry black soot at the exhaust pipe is typically a sign of an overly rich air-fuel mixture, indicating that Technician A is correct. It usually means that there is too much fuel being burned compared to the amount of air. Technician B's statement that it indicates oil consumption is incorrect in this context, as oil consumption often leads to blue smoke, not dry black soot.

While Having a Discussion, Technician a Says That Dry Black