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.
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.
\[ \text{Routine Quality Control} \;\Rightarrow\; \text{Examination Across the Width of the Sliver} \]
Among the given options:
The number of neps may vary across the width of the card due to several factors such as:
Therefore, monitoring the width-wise distribution of neps helps maintain uniform sliver quality and improves the overall spinning performance.
Since neps are the primary quality parameter routinely studied across the width of the carded web, the correct answer is:
\[ \boxed{\text{Nep}} \]
\[ \boxed{\text{Option (B) is correct.}} \]
Counting of Neps at left, middle & right is found in