While discussing possible causes of black smoke from the exhaust of an older heavy-duty diesel engine, Technician A says that black smoke from an engine under acceleration indicates the engine is producing plenty of power. Technician B says that smoke could indicate that the injector nozzle spray holes are worn out. Who is correct?
A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Black smoke from a diesel engine typically indicates incomplete combustion, often due to issues like worn injector nozzle spray holes, which can cause improper fuel atomization. It does not necessarily mean the engine is producing plenty of power.

While Discussing Possible Causes of Black Smoke from the Exhaust