The hoist limit switch also helps prevent what condition?

The hoist limit switch also helps prevent what condition?

• A. The load from hitting the ground
• B. The load from exceeding maximum height
• C. The motor from overheating
• D. The bridge from derailing

Answer: (A)

Hoist limit switches define the end points of hoist travel to prevent over-travel. A lower travel limit is designed to stop downward movement before the load reaches the floor, so it prevents the load from hitting the ground. This protects the load, the rope and hook, and reduces the risk of injury or damage. While there is also an upper limit to keep the hoist from raising too high and striking the crane structure, the key function relevant here is preventing the load from contacting the ground. Overheating is managed by motor protection, and derailing involves other crane systems rather than the hoist limit switch.

Hoist limit switches define the end points of hoist travel to prevent over-travel. A lower travel limit is designed to stop downward movement before the load reaches the floor, so it prevents the load from hitting the ground. This protects the load, the rope and hook, and reduces the risk of injury or damage. While there is also an upper limit to keep the hoist from raising too high and striking the crane structure, the key function relevant here is preventing the load from contacting the ground. Overheating is managed by motor protection, and derailing involves other crane systems rather than the hoist limit switch.