PSCRB Exit Exam • Set 6 Question 8 of 30
What is the function of the drain valve (auto-drain valve) fitted in the bottom of a lifeboat hull?
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Direct Answer
Option A: Automatically drains rainwater when boat is stowed on davits, and seals automatically when boat enters sea water
Automatic bottom drain valves use a buoyant ball that drops open to drain rainwater when stowed, but seals upward under sea water pressure.
All Options
A
Automatically drains rainwater when boat is stowed on davits, and seals automatically when boat enters sea water
(Correct Answer)
B
Drains fuel oil into sea
C
Admits sea water to sink boat
D
Cools engine sump
Detailed Explanation & Context
Automatic bottom drain valves use a buoyant ball that drops open to drain rainwater when stowed, but seals upward under sea water pressure.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Proficiency in Survival Craft and Rescue Boats (PSCRB).
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