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?
A
The change in angle of elevation has no effect on the stresses in the head block.
B
The thrust on the boom is greater at 20°.
C
The stress on the topping lift is greater at 60°.
D
The stress on the heel block is less at 60°.
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Question 1 / 2066636ee728f7522a1c517f4c
Question 1 of 2066636ee728f7522a1c517f4c
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?
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?