Question:

It is a quality control study (Routine), in which the examination is in three areas across the width of output in Carding

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Neps distribution across sliver width is a key routine quality control parameter in carding.
Updated On: Jun 29, 2026
  • Snap
  • Nep
  • Waster Extraction
  • Breakage
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The Correct Option is B

Solution and Explanation

In the carding process, one of the most important quality parameters is the presence and distribution of neps. Neps are small entangled fibre knots formed during fibre processing. A high number of neps adversely affects yarn quality, fabric appearance, and spinning performance.

Step 1: Understand Routine Quality Control in Carding

The quality of the carded sliver is checked regularly to ensure uniform fibre processing across the entire width of the carding machine. Routine quality control involves examining the fibre web for any variation across its width.

\[ \text{Routine Quality Control} \;\Rightarrow\; \text{Examination Across the Width of the Sliver} \]

Step 2: Identify the Parameter Studied Across the Width

Among the given options:

  • Snap – Not a standard quality control parameter in carding.
  • Waster Extraction – Refers to waste removal and is not studied for width-wise variation.
  • Breakage – Indicates machine or fibre damage, not the distribution across the sliver width.
  • Nep – A key quality parameter that is routinely examined across the entire width of the carded web.

Step 3: Why is Nep Distribution Studied?

The number of neps may vary across the width of the card due to several factors such as:

  • Uneven carding action
  • Variation in cylinder and flat settings
  • Differences in airflow
  • Irregular fibre opening and cleaning

Therefore, monitoring the width-wise distribution of neps helps maintain uniform sliver quality and improves the overall spinning performance.

Step 4: Final Answer

Since neps are the primary quality parameter routinely studied across the width of the carded web, the correct answer is:

\[ \boxed{\text{Nep}} \]

\[ \boxed{\text{Option (B) is correct.}} \]

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