PST Exit Exam • Set 2 Question 15 of 30

What is the function of the manual inflation valve (topping valve) on a life raft chamber?

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Direct Answer

Option A: Allows connection of hand pump to add air or depress button to vent over-pressure

Manual inflation or topping valves on SOLAS life raft buoyancy tubes allow survivors to connect hand pumps to maintain structural rigidity or depress internal pins to vent over-pressure caused by solar thermal expansion.

All Options

Allows connection of hand pump to add air or depress button to vent over-pressure (Correct Answer)

Connects to ship's main air compressor

Fills raft with sea water

Drains fuel

Detailed Explanation & Context

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Personal Survival Techniques (PST).

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More Questions in PST Set 2

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Q1 What is the primary function of the painter line on an inflatable life raft before launching? Q2 What is the required length of a life raft painter line for a raft stowed at a height of 10 meters above the waterline? Q3 What safety feature prevents an inflatable life raft from over-inflating and bursting when CO2 gas discharges rapidly? Q4 What device inside a life raft container automatically activates the canopy light when the raft inflates? Q5 How many hand flares are required in a SOLAS Pack A life raft equipment pack? Q6 What type of first aid kit items are specially provided in a SOLAS life raft survival equipment pack? Q7 What is the purpose of the retro-reflective tape patches applied to life rafts, lifejackets, and immersion suits? Q8 What is the function of the rain-water catchment system on a life raft canopy? Q9 What action should survivors take when a rescue helicopter approaches a life raft for winch retrieval? Q10 What is the correct method for securing a rescue strap (strop) lowered from a search and rescue helicopter?