Question

A broken bolt must be replaced. Technician A says that thread pitch is the same as thread coarseness. Technician B says that bolt head markings specify the tensile strength of the bolt. Who is right?

A) Technician A
B) Technician B
C) Both
D) Neither

Answer 1

Technician B is correct; bolt head markings indicate the tensile strength of a bolt while thread pitch is separate from thread coarseness.

Step-by-step explanation:

The correct answer to the question is B) Technician B. This is because thread pitch and thread coarseness are not synonymous terms; thread pitch refers to the distance between threads and is usually measured in millimeters for metric bolts or threads per inch (TPI) for imperial bolts. On the other hand, thread coarseness or thread series relates to the thread profile and the number of threads per inch, which can be a finer or coarser series. Technician B is correct in stating that bolt head markings convey the tensile strength of the bolt. These markings indicate the grade of the bolt, which corresponds to its tensile strength, material, and application standards, and are essential for choosing the right bolt for a given application.