NEIEP Mechanics Practice Exam

On what principle do cable grippers rely to grip the cable tightly?

1. Friction

2. Tension

3. Weight

4. Gravity

The correct answer is: Tension

Cable grippers primarily rely on the principle of friction to securely grip the cable. When the gripper applies a force to the cable, it creates friction between the gripper's surfaces and the cable itself. This frictional force is what prevents the cable from slipping when under tension. In the context of cable grippers, tension is also relevant, as it refers to the load or force being applied to the cable. However, it's the friction generated during this tension that allows the gripper to hold the cable firmly in place. Without sufficient friction, the gripper would not maintain its hold, regardless of the tension present. Weight and gravity, while important concepts in mechanics, do not play a direct role in the gripping action of cable grippers. These factors may influence the overall system but do not determine how the gripper functions at the point of contact with the cable. Thus, the primary reliance of cable grippers on the principle of friction is what enables them to operate effectively.