# GATE (TF) Textile 2022 Question Paper Solution | GATE/2022/TF/22

###### Question 22 (Textile Technology & Fibre Science)

Cusick drape test on a fabric specimen results in a drape coefficient of 0.7. If the total mass of the paper ring is 3.0 g, then the mass (g) of the paper with shadowed area (correct up to 1 decimal place) is ___.

Given in the question,

Drape coefficient=0.7

The total mass of paper ring=3 gm

Then the mass of paper with shadowed area=?

By formula:-

Drape coefficient=Mass of paper with shadowed area/Total mass of paper ring

0.7=Mass of paper with shadowed area/3

0.7 x 3=Mass of paper with shadowed area

Mass of paper with shadowed area=2.1 gm (Ans)

### What is drape coefficient ?

The drape coefficient is a numerical value that represents the draping behavior of a fabric or material. It is used to quantify the way a material drapes or hangs when it is subjected to gravitational forces. The drape coefficient is calculated by measuring the amount of deformation of a material when it is suspended from a fixed point and allowed to hang freely under its own weight. The value of the drape coefficient ranges from 0 to 1, with 1 indicating a very fluid, drapable material and 0 indicating a stiff, rigid material that does not drape well. The drape coefficient is used by textile engineers and designers to evaluate the draping properties of a material, and to select materials that will perform well in specific applications. It is also used to compare and evaluate the draping behavior of different fabrics or materials.

### What is Cusick drape test ?

The Cusick drape test is a method used to measure the draping properties of a fabric or material. The test is named after its inventor, J.A. Cusick, who developed the method in the 1930s. The Cusick drape test involves suspending a circular sample of the fabric or material from a fixed point and measuring the amount of deformation that occurs when the sample is allowed to hang freely under its own weight. The deformation is expressed as a numerical value, known as the drape coefficient, which represents the fluidity and draping behavior of the material. The Cusick drape test is widely used in the textile industry to evaluate the draping properties of fabrics and materials, and to select materials that will perform well in specific applications. It is also used to compare and evaluate the draping behavior of different fabrics or materials.