MFRI Rope Rescue Site Operations Practice Test

The figure 8 descender is shaped like a number 8 with two unequal rings, which is a distinctive feature that sets it apart from other devices used in rope rescue operations. Its design allows for effective friction management when descending or belaying on a rope. The larger ring is used for the rope to pass through, while the smaller ring can be used to attach a carabiner for secure and stable connections.

This device is popular for its simplicity, versatility, and effectiveness in various scenarios, allowing a rescuer to control their descent with ease. Its use is particularly important in situations where precise control of speed and descent is crucial, making it an essential tool in the context of rope rescue operations.

Other options do not share this specific shape and function. For example, a rope grab is designed to slide along the rope but lock in place under load, while pulleys are primarily used for changing the direction of force with minimal friction, and a general descender could refer to various shapes and types of devices that may not specifically look like a number 8.