Answer :

The statement "Tube benders should be used to prevent kinking or reducing the pipe diameter" is:

- True

Explanation:
1. Tube benders are tools specifically designed to bend tubes and pipes without causing kinks or reducing the diameter of the pipe.

2. When a tube or pipe is bent improperly without a tube bender, it can lead to kinking, which weakens the structure of the pipe and obstructs the flow of fluids or gases inside it.

3. By using a tube bender correctly, the pipe can be bent smoothly without altering its diameter or causing kinks, ensuring the integrity and functionality of the pipe are maintained.

Therefore, it is essential to use tube benders when bending pipes to prevent kinking or reducing the pipe diameter, making the statement true.