GSK Exit Exam • Set 3 Question 29 of 30
A lead block is used in a derrick when rigging the
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Direct Answer
Option D: Purchase to advantage
A lead block, often a single sheave block, is used in a derrick rig to change the direction of the running part of a rope, enabling the purchase to be rove to advantage. This means the direction of pull is adjusted for more efficient lifting.
All Options
A
Stay wire
B
Heel block
C
Preventer wire
D
Purchase to advantage
(Correct Answer)
Detailed Explanation & Context
A lead block, often a single sheave block, is used in a derrick rig to change the direction of the running part of a rope, enabling the purchase to be rove to advantage. This means the direction of pull is adjusted for more efficient lifting.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • General Ship Knowledge (GSK).
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