TASCO Exit Exam • Set 2 Question 3 of 30
What parameter must be verified prior to authorizing enclosed space entry for emergency procedures and alarm protocols related to Advanced Oil Tanker Cargo?
✓
Direct Answer
Option C: Atmospheric oxygen level at 20.9% and zero toxic/flammable gas concentration
Enclosed space entry procedures per IMO and ISGOTT standards strictly demand a pre-entry atmosphere of 20.9% oxygen, zero toxic gases like hydrogen sulfide, and less than 1% LFL before authorizing entry.
All Options
A
Oxygen level at 15% with ventilation turned off
B
Temperature check only
C
Atmospheric oxygen level at 20.9% and zero toxic/flammable gas concentration
(Correct Answer)
D
Visual inspection through access hatch without gas testing
Detailed Explanation & Context
Enclosed space entry procedures per IMO and ISGOTT standards strictly demand a pre-entry atmosphere of 20.9% oxygen, zero toxic gases like hydrogen sulfide, and less than 1% LFL before authorizing entry.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Oil Tanker Cargo Operations (TASCO).
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