A derrick with a vertical rotating mast (supported by guys) and a boom whose bottom end is hinged or pivoted is called a(n):

A derrick with a vertical rotating mast (supported by guys) and a boom whose bottom end is hinged or pivoted is called a(n):

• A. Tower Crane
• B. Guy Derrick
• C. Jib Crane
• D. Hammerhead Crane

Answer: (B)

This configuration is a guy derrick—the vertical mast is stabilized by tensioned guy wires, and the boom is hinged at its base so it can sweep and be positioned as needed. The guys keep the tall mast upright while it rotates, which is the hallmark of a derrick that uses a guying system. A tower crane has a tall fixed tower and a rotating jib but isn’t guyed in this way, a jib crane has a short arm on a vertical post and isn’t a derrick, and a hammerhead crane uses a different top-supported crown arrangement. So the described setup fits a guy derrick.

This configuration is a guy derrick—the vertical mast is stabilized by tensioned guy wires, and the boom is hinged at its base so it can sweep and be positioned as needed. The guys keep the tall mast upright while it rotates, which is the hallmark of a derrick that uses a guying system. A tower crane has a tall fixed tower and a rotating jib but isn’t guyed in this way, a jib crane has a short arm on a vertical post and isn’t a derrick, and a hammerhead crane uses a different top-supported crown arrangement. So the described setup fits a guy derrick.