Which of the following tools would you use for holding a pipe firmly while working?

The chain vise is specifically designed for securely holding pipes in place, making it the ideal tool for this task. It utilizes a chain that wraps around the pipe and tightens, providing a strong grip. This allows for hands-free operation, which is especially useful when performing actions like cutting, welding, or threading pipes.

Channel lock pliers, while useful for gripping and turning various objects, do not provide the stability or holding power necessary for larger pipes. A pipe wrench is indeed a tool meant specifically for gripping and turning pipes, but it is better suited for situations where the pipe needs to be manipulated rather than merely held in position. A torque wrench is used for applying a specific amount of torque to fasteners and would not be applicable for holding a pipe.

Choosing the chain vise ensures that you can work safely and effectively, allowing both hands to be free for other tasks while the pipe remains securely in place.