GATE (TF) Textile 2020 Question Paper Solution | GATE/2020/TF/30

Question 30 (Textile Engineering & Fibre Science)

Determine the correctness or otherwise of the following Assertion [a] and Reason [r].
[a]: Melting point of nylon 66 fibre is much higher than that of polyethylene fibre.
[r]: The molecular weight of nylon 66 fibre is significantly higher than that of polyethylene fibre.

(A)Both [a] and [r] are true and [r] is the correct reason for [a]
(B)Both [a] and [r] are true but [r] is not the correct reason for [a]
(C)Both [a] and [r] are false
(D)[a] is true but [r] is false
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Frequently Asked Questions | FAQs

What is nylon66 fibre?

Nylon 66, also known as polyamide 66, is a type of synthetic polymer that is commonly used in the production of fibers, plastics, and various other materials. Nylon 66 fibers are a specific form of this polymer that are manufactured in a way that makes them suitable for use in textiles and other applications.
Nylon 66 fibers are known for their strength, durability, and resistance to abrasion, making them ideal for use in applications such as clothing, upholstery, and outdoor gear. They are also known for their ability to hold color well and their resistance to wrinkling and shrinking.
Overall, Nylon 66 is a versatile material that is widely used in a variety of industries due to its durability, strength, and other favorable properties.

What is polyethylene fibre?

Polyethylene fiber is a synthetic fiber made from polyethylene, which is a type of plastic. It is a very strong and durable material, with high tensile strength and abrasion resistance. Polyethylene fibers are commonly used in the manufacturing of ropes, twines, nets, and other heavy-duty applications.
Polyethylene fibers can be produced in different forms, including monofilament, multifilament, and staple fibers. Monofilament fibers are single, continuous filaments, while multifilament fibers are made up of many smaller filaments twisted together. Staple fibers, on the other hand, are short fibers that are typically spun into yarns or fabrics.
One of the main advantages of polyethylene fibers is their resistance to water, chemicals, and UV radiation, making them suitable for outdoor applications. They are also lightweight and have a low coefficient of friction, which makes them useful for applications that require low friction, such as fishing lines and cable sheathing.
Overall, polyethylene fibers are a versatile and reliable material that can be used in a wide range of applications, from heavy-duty industrial uses to outdoor recreation equipment.

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