Difficulty: Easy
Correct Answer: cotton fabric
Explanation:
Introduction / Context:
Buffing is a finishing process used to improve luster and smoothness of surfaces after machining or grinding. The wheel material and applied compounds determine the final appearance and micro-roughness.
Given Data / Assumptions:
Concept / Approach:
Buffing wheels are typically built from layers of cloth—most commonly cotton—stitched together to form a flexible face. The cotton holds and delivers polishing compound to the work, enabling gentle abrasion and plastic flow at the surface, producing a high shine.
Step-by-Step Solution:
Identify typical wheel structure: multiple plies of cotton cloth, stitched.Confirm function: carry compound and conform slightly to surface contours.Select “cotton fabric” as the correct material.
Verification / Alternative check:
Supplier catalogs list stitched cotton, loose-leaf cotton, and ventilated cotton buffs as standard options.
Why Other Options Are Wrong:
Metals (A) would scratch and are not used for buffing wheels; carbon/graphite (C/D) are not typical buffing wheel materials; glass fiber (E) relates to reinforced abrasive wheels rather than cloth buffs.
Common Pitfalls:
Confusing buffing (cloth + compound) with polishing using fixed abrasive wheels; using the wrong compound for the substrate leading to smearing or residue.
Final Answer:
cotton fabric
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