Final answer:
The T.A.B. joint enhances the mechanical and adhesive FRP joint reliability. It combines threading or another form of mechanical fastening with an adhesive bond to capitalize on each method's strengths.
Step-by-step explanation:
The threaded and bonded (T.A.B.) joint improves the reliability of a mechanical and adhesive FRP joint. The correct answer to the question is C) Mechanical; Adhesive. The T.A.B. method involves both a mechanical grip, achieved by threading or other means of fastening, and a chemical bond, provided by an adhesive.
It combines the benefits of mechanical fastening's immediate load-carrying capability with the smooth load distribution and sealing properties of an adhesive bond. This dual approach leverages the advantages of each joining method to create a more durable and reliable joint capable of sustaining significant loads and stresses.