Question

If twist factor is same for a set of cotton yarns, then the yarns have the same:

• A. Linear density
• B. Turns per metre
• C. Packing density
• D. Angle of twist of surface fibres

Hint:

- The twist factor gives an indication of the number of twists per unit length and the yarn's linear density.
- If the twist factor is constant, it means the turns per metre are the same across the yarns.

Answer 1

The Correct Option is B

The twist factor of a yarn is defined as the product of the number of twists per unit length and the square root of the linear density of the yarn. If the twist factor is the same for a set of cotton yarns, it implies that the number of turns per metre will be the same for all these yarns, given the same linear density. This is because the twist factor depends directly on the turns per metre and linear density.
- Linear density is not necessarily the same, as different yarns with the same twist factor may have different densities.
- Packing density refers to how tightly the fibres are packed in the yarn, which is not directly related to the twist factor.
- Angle of twist of surface fibres may vary based on the construction of the yarn and does not directly relate to the twist factor.
Thus, the correct answer is (B) Turns per metre.