Overhead Crane Practice Test

The trolley is the component of an overhead crane that is specifically designed to move the load along the bridge. It is mounted on the bridge and typically consists of wheels or rollers that travel on the girder rail of the crane. The trolley can move horizontally, allowing it to position the load at various points along the bridge's length. This function is crucial for effective material handling in various industrial settings, enabling precise movement and placement of heavy loads.

In contrast, the hoist is responsible for lifting and lowering the load but does not facilitate horizontal movement. The controls refer to the system used to operate the crane, providing input for both the hoist and the trolley, but they do not actively move the load themselves. The runway is the track or structure on which the entire overhead crane moves, but it does not involve the actual positioning of the load, which is the trolley's job. Understanding these roles helps clarify the operational mechanics of overhead cranes.