GATE (TF) Textile 2020 Question Paper Solution | GATE/2020/TF/41

Question 41 (Textile Engineering & Fibre Science)

Determine the correctness or otherwise of the following Assertion [a] and Reason [r].
[a]: Foam finishing significantly reduces the energy consumed in drying.
[r]: The specific heat of air is significantly lower than that of water.

(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 foam finishing in textile?

Foam finishing is a textile finishing process that involves applying a foam containing finishing agents to the surface of a fabric. The foam is created by mixing water, air, and finishing agents, which can include softeners, lubricants, anti-static agents, and other additives. The foam is then applied to the fabric using a foam applicator, which spreads the foam evenly over the fabric surface.
Foam finishing can provide a number of benefits to textiles, including:

Softness: Softeners can be added to the foam to make the fabric softer and more comfortable to wear.

Lubrication: Lubricants can be added to the foam to reduce friction and improve the fabric’s hand.

Anti-static properties: Anti-static agents can be added to the foam to reduce static electricity and improve the fabric’s performance.

Water repellency: Water-repellent agents can be added to the foam to make the fabric resistant to water and stains.

Flame retardancy: Flame-retardant agents can be added to the foam to make the fabric less flammable.

Foam finishing is a relatively new technology that is becoming increasingly popular in the textile industry because it is a more sustainable alternative to traditional wet processing methods. Foam finishing uses less water, energy, and chemicals than traditional finishing methods, which makes it more environmentally friendly. Additionally, foam finishing can be used on a wide range of fabrics, including delicate fabrics such as silk and wool, which may be damaged by traditional wet processing methods.

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