TFD Basic Hose Practice Test

What is the thread count per inch for 2½ inch coupling threads?

7.5 threads per inch 5.0 threads per inch 9.0 threads per inch 6.5 threads per inch

Correct Answer:

7.5 threads per inch

Explanation:

Thread count per inch is the standard pitch of the threads on a hose coupling. For a 2½ inch fire hose coupling, the accepted pitch is 7.5 threads per inch. That means there are seven and a half ridges in every inch of the threaded portion, which equals about 0.133 inches per thread. This specific pitch is standardized so hoses and couplings from different manufacturers fit together properly. The other numbers don’t match this size’s standard pitch, so they wouldn’t thread correctly for a 2½ inch coupling.

Access more questions from this quiz

Continue to TFD Basic Hose Practice Test for more practice questions and the full quiz experience.

Access More Questions