Red Seal Steamfitter/Pipefitter Practice Exam

In what scenario would you use a reducer fitting?

1. To connect two pipes of the same diameter

2. To change the direction of fluid flow

3. To connect pipes of different diameters

4. To cap off an end of a pipe

The correct answer is: To connect pipes of different diameters

A reducer fitting is specifically designed to connect pipes of different diameters. This type of fitting allows for the transition between a larger diameter pipe and a smaller diameter pipe, facilitating fluid flow while minimizing turbulence and pressure loss. This is crucial in applications where a change in pipe size is necessary due to system requirements or design considerations. In contrast, using a reducer for connecting pipes of the same diameter would not be appropriate, as there would be no need for a fitting that alters the size of the pipes. Changing the direction of fluid flow would typically require a different type of fitting, such as an elbow or a tee. Lastly, capping off the end of a pipe would be accomplished using a cap fitting, which serves a different purpose entirely by sealing the pipe. Therefore, the unique function of a reducer is to effectively connect pipes of varying diameters within a piping system.