OCTCO/OCTF Exit Exam • Set 2 Question 13 of 30
What precaution must be observed when taking manual oil soundings on an inerted tanker?
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Direct Answer
Option B: Use vapor-lock valves and metallic sounding tapes properly grounded/bonded to ship structure
ISGOTT procedures mandate vapor-lock valves and metallic tapes bonded to the hull when sounding inerted tanks, preventing electrostatic ignition and toxic gas release.
All Options
A
Use nylon rope
B
Use vapor-lock valves and metallic sounding tapes properly grounded/bonded to ship structure
(Correct Answer)
C
Open main hatch wide
D
Stand barefoot
Detailed Explanation & Context
ISGOTT procedures mandate vapor-lock valves and metallic tapes bonded to the hull when sounding inerted tanks, preventing electrostatic ignition and toxic gas release.
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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