Question

Friction Spun yarns are characterized by

• A. Low Uniformity
• B. High Uniformity
• C. High CSP
• D. High Moisture absorption

Hint:

Friction spun yarns have comparatively lower uniformity due to random fibre deposition.

Answer 1

The Correct Option is A

Concept: Friction spinning (DREF system) forms yarn by collecting fibres on a rotating surface using air suction and friction drums. The fibre arrangement is less controlled compared to ring spinning, resulting in a more irregular yarn structure.

Step 1: Understand friction spinning mechanism.
Fibres are deposited randomly on friction drums. \[ \text{Random fibre deposition} \Rightarrow \text{Less uniform structure} \]

Step 2: Analyze yarn quality.

• Fibre orientation is less controlled
• Yarn structure is more open
• Variation is higher \[ \text{Result: Low uniformity} \]

Step 3: Evaluate options.

• High CSP → not characteristic of friction yarn
• High uniformity → incorrect
• Moisture absorption → unrelated property

Step 4: Final answer.
\[ \boxed{\text{Low Uniformity}} \] Thus, \[ \boxed{\text{Option (A) is correct.}} \]