Fiber Yarn Fabric Math Solution❶Find Out the elastic recovery of a fiber,if original fiber length is 100 mm,length of fiber after elongation is 105 mm,& length of fiber after recovery is 101 mm.

Has given,the length of a fiber……

Original, AB = 100 mm

After Elongation,BC = (105-100) mm = 5 mm

After Recoverry,CD = (105-101) mm = 4 mm

We know,

Elastic Recovery = ( CD × 100)

BC

=4×100

5

=80%. (Answer)

❷Find out the moisture regain & moisture content, if a 5 gm fabric found 4.5 gm after heating at 100° C for 15 minutes.

Here,

Conditioned weight = 5 gm

Dry weight = 4.5 gm

So,Moisture regain = (Conditioned weight – Dry weight)×100

Dry weight

= (5 – 4.5) × 100

4.5

= 11.1111 (Ans)

And,Moisture Content = (Conditioned weight – Dry weight)×100

Conditioned weight

= (5 – 4.5) × 100

5

= 10 (Ans)