Derricks are capable of handling loads at various reaches and are powered by hoists through a system of _____.

• A. Rope reeving system
• B. Hydraulic pistons
• C. Electric winches
• D. Counterweights

Answer: (A)

Derricks lift by routing the hoist rope through a system of pulleys and blocks—the rope reeving system. This arrangement lets the same hoist wind the rope through upper and lower blocks to create mechanical advantage, change the direction of pull, and reach the load at different boom positions. The rope path determines how much load can be lifted and how far the hook can travel, enabling precise, controlled hoisting across the derrick’s reach. Hydraulic pistons describe a different type of lifting mechanism, electric winches are just the pulling device and don’t by themselves define the hoisting system, and counterweights balance the structure rather than transmit the hoist force.