You are lifting a one-ton weight with a swinging boom. When comparing the stresses in 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?

Question

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

Accepted Answer

Option A: The stress on the masthead fairlead for the topping lift is greater at 20&deg;.. A lower boom angle (20 degrees) drastically increases the load vector on the topping lift, thereby placing significantly greater stress on the masthead fairlead compared to a higher boom angle like 60 degrees.

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

You are lifting a one-ton weight with a swinging boom. When comparing the stresses in 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?