Which device is used for lowering a load that may change during operations?

• A. Brake bar rack
• B. Rope clamp
• C. Descent controller
• D. Telescoping belay device

Answer: (A)

When lowering a load whose weight may change during operations, you need a device that lets you adjust braking smoothly and respond to weight shifts in real time. The brake bar rack does exactly that: a brake bar presses rope into a toothed rack to create adjustable friction, so you can throttle the descent as the load moves or changes. This gives consistent control and a quick way to arrest descent if needed.

Descent controllers are designed for a steady, controlled rate and can be less responsive to rapid weight changes. Rope clamps are used to secure or lock rope rather than to control lowering. Telescoping belay devices are mainly for belaying or securing a load rather than providing the ongoing, adjustable lowering needed when the load varies.