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 caused by a rich air-fuel mixture, not oil consumption. Therefore, only Technician A is correct.

While Having a Discussion, Technician a Says That Dry Black