General use pulleys must have a minimum tensile strength of at least how many k/N without permanent damage?

The correct choice is based on the rigorous safety and performance standards required in technical rescue operations. General use pulleys are critical components in the rigging systems used during rescues, and their tensile strength directly relates to their ability to safely handle and support loads without experiencing permanent deformation or damage.

Having a minimum tensile strength of at least 22 k/N ensures that the pulley can accommodate significant forces that may occur during a rescue operation. This strength is essential to ensure both the safety of the rescuers and the individuals being rescued. The forces in play can be substantial, varying depending on the context of use, such as the weight of the victim, environmental conditions, and the dynamics of the rescue operation.

Using a pulley with insufficient tensile strength could lead to failure under load, resulting in dangerous situations for both the rescuer and the subject. Thus, understanding and using equipment with the appropriate tensile strength is vital for ensuring effective and safe rescue practices.