PSCRB Exit Exam • Set 5 Question 7 of 30
What safety mechanism prevents the fall wire from unwinding off the davit winch drum when the lifeboat reaches the water?
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Direct Answer
Option A: Limit switches or winch drum end-securing stops
Electrical limit switches cut winch motor power during hoisting, and wire end clamps ensure minimum 3 dead turns remain on drum during lowering.
All Options
A
Limit switches or winch drum end-securing stops
(Correct Answer)
B
Rope shear pin
C
Manual ratchet pawl
D
Hydraulic bypass line
Detailed Explanation & Context
Electrical limit switches cut winch motor power during hoisting, and wire end clamps ensure minimum 3 dead turns remain on drum during lowering.
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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