Deck General USCG Question #4763 (Set 151)

A sling is rigged on a piece of pipe weighing 1000 lbs. The angle between the sling legs is 140° and the legs are of equal length. What stress is exerted on each sling leg when the pipe is lifted?

Official USCG Answer & Rule Citation

Correct Answer: Option D — 1462 lbs.

Sling leg stress is calculated using the formula T = W / (2 * cos(theta/2)). For a 1000 lb load with a 140-degree included angle, the cosine of 70 degrees yields a leg stress of 1462 lbs.

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