Question

Consider the following and choose the correct answer with respect to "In Draw Texturising" Assertion [A]: Temperature can be changed in Primary and Secondary Heaters with desired range. Reason [R]: Crimped Yarns need setting of crimp

• A. [A] is true, but [R] is false
• B. Both [A] and [R] are true
• C. [A] is false, but [R] is true
• D. Both [A] and [R] are false

Hint:

Draw texturising uses controlled heating to set crimp permanently in synthetic filaments.

Answer 1

The Correct Option is B

Concept: In draw texturising, thermoplastic filaments are stretched and then heat-set to develop permanent crimp. Heaters control the temperature required for molecular rearrangement and fixation of yarn structure.

Step 1: Analyze Assertion [A].
Primary and secondary heaters allow controlled temperature variation. \[ \text{Temperature control} \Rightarrow \text{True} \]

Step 2: Analyze Reason [R].
Crimped yarns require heat setting to stabilize the crimp structure. \[ \text{Crimp setting requirement} \Rightarrow \text{True} \]

Step 3: Check relation.
Both statements are correct and related.

Step 4: Final answer.
\[ \boxed{\text{Both [A] and [R] are true}} \] Thus, \[ \boxed{\text{Option (B) is correct.}} \]