Deck Safety (Supplementary) USCG Q#2050 (Set 5)

What is the mechanical advantage of tackle number 9 as shownin illustration D029DG below?

USCG Exam Illustration D029DG — USCG Examination Diagram: **Illustration D029DG**

Official USCG Answer & Rule Citation

Correct Answer: Option D — 4

Tackle number 9 represents a gun tackle or two double-sheave blocks configured to provide a mechanical advantage of 4, calculated by counting the number of parts of the hauling line supporting the moving block.

All Deck Safety (Supplementary) Sets Practice Set 5