OCTCO/OCTF Exit Exam • Set 1 Question 4 of 30
What condition is mandatory before starting Crude Oil Washing (COW)?
✓
Direct Answer
Option D: Cargo tank must be inerted with O2 < 8%
Under MARPOL and ISGOTT guidelines, cargo tanks must be fully inerted with oxygen concentrations strictly maintained below 8% by volume prior to commencing Crude Oil Washing to prevent flammable atmospheres.
All Options
A
Boiler off
B
Tank open to air
C
Dry dock
D
Cargo tank must be inerted with O2 < 8%
(Correct Answer)
Detailed Explanation & Context
Under MARPOL and ISGOTT guidelines, cargo tanks must be fully inerted with oxygen concentrations strictly maintained below 8% by volume prior to commencing Crude Oil Washing to prevent flammable atmospheres.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).
Advertisement
Practice Full OCTCO/OCTF Set 1
Test yourself with 30 interactive questions, live timer, and instant score.