OCTCO/OCTF Exit Exam • Set 1 Question 20 of 30

What is total oil discharge limit for existing tankers during ballast voyage under MARPOL Annex I?

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Direct Answer

Option D: Max 1/30,000 of total cargo carried on previous voyage

MARPOL Annex I Regulation 34 limits the total quantity of oil that can be discharged into the sea during a ballast voyage for existing tankers to a maximum of 1/30,000 of the total quantity of the specific cargo of which the residue formed a part.

All Options

1/1,000

100 m3

Zero everywhere

Max 1/30,000 of total cargo carried on previous voyage (Correct Answer)

Detailed Explanation & Context

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).

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More Questions in OCTCO/OCTF Set 1

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Q1 What MARPOL Annex regulates prevention of oil pollution from tankers? Q2 What is the maximum oxygen content allowed in inert gas supplied to cargo tanks? Q3 What operation uses crude oil jets to clean sludges from tank walls during discharge? Q4 What condition is mandatory before starting Crude Oil Washing (COW)? Q5 What system monitors and controls oily water discharge overboard from slop tanks? Q6 What is the maximum instantaneous rate of oil discharge allowed outside Special Areas under MARPOL Annex I? Q7 What device stops hydrocarbon gas backflowing from cargo tanks into the machinery space? Q8 What instrument measures flammable vapor concentration as a percentage of LEL? Q9 What is Reid Vapor Pressure (RVP)? Q10 What device protects oil cargo tanks against overpressure or vacuum structural damage?