Final answer:
The three most common devices used in hoist operations are hydraulic lever systems, mechanical lever systems, and pulley systems.
Step-by-step explanation:
The three most common devices used in hoist operations are hydraulic lever systems, mechanical lever systems, and pulley systems.
Hydraulic lever systems use hydraulic fluid to generate force and are typically used in heavy machinery.
Mechanical lever systems use mechanical advantage to amplify force and are commonly found in construction cranes and other lifting equipment.
Pulley systems use ropes and pulleys to lift heavy objects and are often used in flagpoles, window blinds, and construction cranes.