Question

Counting of Neps at left, middle & right is found in

• A. Blow room
• B. Fibre retriver
• C. Trash analyzer
• D. Carding

Hint:

• Neps are fiber entanglements, a common yarn defect.
• The carding machine} produces a card web.
• Assessing the card web for nep content and distribution (left, middle, right across its width) is a key quality control check in carding.
• This helps ensure uniform card performance and diagnose localized problems.

Answer 1

The Correct Option is D

Neps are small entanglements of fibers, considered defects. Nep counting across the width ("left, middle & right") is typically done on a sheet or web of fibers.

• (a) Blow room: Fibers are in tuft form, not a uniform web suitable for such spatial nep counting.
• (b) Fibre retriever: Processes waste; the form of material might not be a consistent web.
• (c) Trash analyzer: Instruments like AFIS count neps in a fiber sample but don't typically report based on left/middle/right of a machine's web output in this way.
• (d) Carding: The carding machine produces a "card web," a wide, thin sheet of individualized fibers, before it's condensed into a sliver. It's standard practice to assess the card web for neps and other defects, including checking for uniformity of nep distribution across its width (left, middle, right). This helps diagnose issues with card settings or the condition of card clothing.

Therefore, counting neps at left, middle, and right is characteristic of quality assessment at the Carding stage, specifically on the card web. \[ \boxed{\text{Carding}} \]