Assistant Engineer Limited AEL Practice Questions - USCG Assistant Engineer-Limited Of Steam, Motor, And Or Gas Turbine-Propelled Vessels Exam

Black smoke from a diesel exhaust at normal load most commonly indicates:

Excess lubricating oil burning in the combustion space Water leaking into a cylinder Incomplete combustion from too much fuel or insufficient air Normal idle operation

Correct Answer:

Incomplete combustion from too much fuel or insufficient air

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