Question

question 97 of 100 · multiple choice

in the thread designation \\(\frac{3}{8} \times 16\\) unc, the unc stands for?

a unified national fine thread standard
b unified numerical control thread standard
c united national coarse thread standard
d united nations conventional thread standard

Explanation:

Identify the meaning of the acronym UNC in thread standards

The Unified Thread Standard (UTS) defines standard thread forms and series. In this system:

• "UNC" stands for Unified National Coarse (often referred to as Unified Coarse).
• "UNF" stands for Unified National Fine.

Evaluate the given multiple-choice options

• Option A: "Unified National Fine thread standard" corresponds to UNF.
• Option B: "Unified Numerical Control thread standard" is incorrect.
• Option C: "United National Coarse thread standard" matches the standard definition of UNC (using "United" or "Unified" National Coarse).
• Option D: "United Nations Conventional thread standard" is incorrect.

Answer:

• (A) Unified National Fine thread standard
• (B) Unified Numerical Control thread standard
• (C) United National Coarse thread standard (Correct answer)
• (D) United Nations Conventional thread standard