Question 30 (Textile Technology & Fibre Science)
Determine the correctness or otherwise of the following Assertion [a] and Reason [r].
[a]: Para-aramid fibres have better mechanical properties as compared to metaaramid fibres
[r]: The chemical structure of para-aramid fibres allows them to pack closely
|(A)||Both [a] and [r] are true and [r] is the correct reason for [a]|
|(B)||Both [a] and [r] are true and [r] is not the correct reason for [a]|
|(C)||Both [a] and [r] are false|
|(D)||[a] is true but [r] is false|
Option A is correct
Frequently Asked Questions | FAQs
What is para-aramid fibre ?
Para-aramid fiber is a type of synthetic, high-strength and heat-resistant fiber. It is also known as para-phenylenediamine (PPD) fiber or simply aramid fiber. Para-aramid fibers are characterized by their high tensile strength, high modulus of elasticity, and excellent heat resistance, making them useful in a variety of applications, including protective clothing, ballistic protection, and composites. They are also used in applications where high strength and heat resistance are required, such as aerospace, automotive, and electrical components. The most well-known brand of para-aramid fiber is “Kevlar”, which is used in a variety of applications, including body armor, racing sails, and high-performance composites.
What is meta-aramid fibre ?
Meta-Aramid fibers are a type of synthetic fibers made from polymer called meta-phenylenediamine and isophthalic acid. They are used in various high-performance applications such as heat and flame-resistant protective clothing, composite materials for aerospace, automotive, and construction industries. These fibers are known for their high strength and toughness, and good thermal stability, making them suitable for high-stress applications.