Question

The production of Trilobal fibre in Man-made fibre is derived from the feature of

• A. Silk
• B. Nylon
• C. Basalt
• D. Wool

Hint:

Remember: \[ \boxed{ \text{Trilobal Fibre} \Longrightarrow \text{Silk-inspired Cross-section} } \] Key idea: \[ \begin{aligned} \text{Silk} &\rightarrow \text{Natural Lustre (Triangular/Irregular cross-section)} \text{Trilobal Fibre} &\rightarrow \text{Artificial Silk-like Lustre} \end{aligned} \] Trilobal fibres are commonly used in carpets, upholstery, and fancy textiles to enhance shine and aesthetic appeal.

Answer 1

The Correct Option is A

Concept: In man-made fibre technology, the cross-sectional shape of fibres plays an important role in determining their optical and physical properties such as lustre, bulkiness, and texture. Apart from the conventional circular cross-section, fibres can be engineered into different shapes such as:
• Trilobal
• Multilobal
• Hollow
• Octalobal A trilobal fibre has a three-lobed cross-section which enhances light reflection, giving the fibre a higher lustre and a silk-like appearance. This design is inspired by the natural structure of silk fibre, which has a triangular or irregular cross-section responsible for its characteristic sheen.

Step 1: Understand trilobal fibre structure.
Trilobal fibres are engineered to mimic the natural brilliance of silk. Their three-lobed geometry causes: \[ \begin{aligned} &\bullet\ \text{Increased light reflection,} &\bullet\ \text{High lustre,} &\bullet\ \text{Silk-like appearance,} &\bullet\ \text{Improved aesthetic value.} \end{aligned} \]

Step 2: Identify the inspiration for trilobal fibre.
The design of trilobal fibres is primarily derived from the natural characteristics of: \[ \boxed{\text{Silk fibre}} \] because silk naturally exhibits high lustre due to its cross-sectional geometry.

Step 3: Examine each option.
Option (A): Silk Silk is the natural fibre whose structure inspires the trilobal cross-section design. \[ \boxed{\text{Correct}} \] Option (B): Nylon Nylon can be produced in trilobal form, but the concept is derived from silk’s lustrous appearance. \[ \boxed{\text{Incorrect}} \] Option (C): Basalt Basalt fibres are inorganic and unrelated to trilobal structural inspiration. \[ \boxed{\text{Incorrect}} \] Option (D): Wool Wool has a scaly structure but is not the inspiration for trilobal cross-section design. \[ \boxed{\text{Incorrect}} \]

Step 4: Write the final answer.
Thus, the production of trilobal fibre in man-made fibres is derived from the feature of \[ \boxed{\text{Silk fibre}.} \] Therefore, \[ \boxed{\text{Option (A) is the correct answer.}} \]