Question 19 of 30
Which one of the following discharges have the most long-term ecological impact due to pollution?
A
Water ballast in oil fuel tanks.
B
Ballast added to cargo tanks.
C
Discharges of clean and segregated ballast
D
Machinery space bilges.
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Answer & Explanation
The correct answer is Option A: Water ballast in oil fuel tanks..
Ballast water in oil fuel tanks becomes heavily contaminated with oil residues, which are persistent and hazardous if discharged. Unlike clean ballast, this mixture has significant long-term ecological consequences due to its toxicity and environmental persistence.