Refresher Exit Exam • Set 2 Question 30 of 30
Fire hydrant valves on a crude oil tanker shall be isolated from the crude oil washing system by
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Direct Answer
Option A: Spade blanks
Spade blanks (also known as slip blinds) provide a positive, physical barrier between the fire main and the crude oil washing system. This is a critical safety requirement to prevent hazardous hydrocarbon vapors from entering the fire main.
All Options
A
Spade blanks
(Correct Answer)
B
Face blanks
C
Non-return valves
D
Automatic closing valves
Detailed Explanation & Context
Spade blanks (also known as slip blinds) provide a positive, physical barrier between the fire main and the crude oil washing system. This is a critical safety requirement to prevent hazardous hydrocarbon vapors from entering the fire main.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Refresher Course for STCW Modular Courses (Refresher).
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