While Discussing Possible Causes of Black Smoke from the Exhaust

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

Correct Answer:

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