Question

Consider the following activities on a carding machine:
P. Lowering surface speed of feed roller
Q. Increasing rotational speed of taker-in
R. Increasing linear density of feed material
S. Use of shorter and finer fibres
The correct combination of the above activities to obtain more number of taker-in teeth acting per fibre is .................

• A. P and Q
• B. Q and R
• C. R and S
• D. S and P

Hint:

- Increasing the speed of the taker-in and the linear density of the feed material helps to improve fibre intake and increases the number of teeth acting per fibre.

Answer 1

The Correct Option is B

To increase the number of taker-in teeth acting per fibre, the activities related to the feeding and intake of fibres must be adjusted. Increasing the rotational speed of the taker-in (Q) allows for more fibres to be taken in by the carding machine, while increasing the linear density of the feed material (R) also helps pack more fibres into the system.
- Lowering the surface speed of the feed roller (P) would reduce the fibre feeding rate, which is counterproductive for increasing the number of teeth acting on the fibres.
- Using shorter and finer fibres (S) may improve the carding process but does not directly increase the number of taker-in teeth acting per fibre.
Thus, the correct combination is \( Q \) and \( R \). Final Answer: The correct answer is \( \boxed{B} \).