You are lifting a one-ton weight with a swinging boom. When comparing the stresses on the rig with the boom at 20° to the horizontal to the stresses when the boom is at 60° to the horizontal, which statement is TRUE?

Correct Answer: Option B — The stress on the head block is greater at 60°.

As a swinging boom is raised from a lower angle (20°) to a higher angle (60°), the geometry significantly increases the vertical component of the load on the head block and topping lift system.