Fibres

Q. Explain the steps involved in the production of wool.

Q.

Uses of rayon

Q.

Write two characteristics of silk fiber.

Q.

What are synthetic fibers? Give two examples

Q.

What do you mean by shearing? Does this process hurt the sheep? why/why not? [3 MARKS]

Q.

The properties of acrylic fibre

Q. The woolly covering on sheep is known as _________.

1. web
2. cocoon
3. fleece
4. scales

Q.

What is the difference between cashmilon and wool?

Q.

Which scientist discovered rayon?

Q. The process of washing the sheared hair of the sheep is known as ___.

1. Sorting

2. Washing

3. Rearing

4. Scouring

Q. is the process of twisting fibres to make yarn

1. Reeling
2. Spinning
3. Shearing

Q.

Sorter's disease is caused by:

1. Fungi

2. Bacteria

3. Algae

4. Virus

Q. Which fibre is used for making parachutes and ropes for rock climbing?

1. Rayon
2. Nylon
3. Cotton threads
4. Silk

Q. Which of the following is the first artificial fibre ?

1. Artificial silk
2. Terylene.
3. Polyester.
4. Spandex

Q. Burning wool smells like a burning .

1. Cotton
2. Silk
3. Polyester

Q. Which amongst the following processes is done after scouring of wool?

1. Shearing
2. Reeling
3. Washing
4. Sorting

Q.

1.what planing must farmers do for proper sheep rearing?

2.what suggestions would you give to workers of silk industry in order to overcome the health hazard?

3.what are the important characteristics of silk that makes it a comfortable clothe to wear?

Q. Which of the following is not a source of wool?

1. 
2. 
3. 
4. 

Q.

Given below is the cycle in which processing of wool is done. Complete the cycle in the following blanks. Also, explain them in brief.

Shearing, Scouring, Sorting, , , . [3 MARKS]

Q.

1.Describe the series of steps involved in wool extraction?

2.As seasons change from winter to summer and then to rains, how would you choose your clothes?

Q. Choose the option depicting the correct order of different stages of the lifecycle of silkworm.

1. Egg $\to$ Larvae $\to$ Cocoon $\to$ Adult silk moth
2. Larvae $\to$ Egg $\to$ Cocoon $\to$ Adult silk moth
3. Adult silk moth $\to$ Egg $\to$ Cocoon $\to$ Larvae
4. Adult silk moth $\to$ Cocoon $\to$ Egg $\to$ Larvae

Q. Identify the correct order of the steps involved in the wool production from the following:
1. Scouring 2. Sorting 3. Rearing and breeding 4. Dyeing 5. Shearing 6. Rolling

1. 1 → 2 → 3 → 4 → 5 → 6
2. 2 → 1 → 3 → 5 → 6 → 4
3. 3 → 5 → 1 → 2 → 4 → 6
4. 6 → 4 → 5 → 1 → 3 → 2

Q. Silk fibres are obtained from the ________ of silkworms.

1. fleece
2. cocoon
3. skin
4. egg

Q.

What are the properties of acrylic fibres?

Q. Which of the following can be used for weaving yarn into fabric?

1. Reeler
2. Loom
3. Twister
4. Charkha

Q.

How shearing is helpful to sheep ?

Q. Identify the correct order of the steps involved in the wool production from the following steps:
1. Scouring 2. Sorting 3. Rearing and breeding 4. Dyeing 5. Shearing 6. Rolling

1. 1 → 2 → 3 → 4 → 5 → 6
2. 2 → 1 → 3 → 5 → 6 → 4
3. 3 → 5 → 1 → 2 → 4 → 6
4. 6 → 4 → 5 → 1 → 3 → 2

Q. The process of washing the sheared hair of the sheep is known as ________.

1. carding
2. rearing
3. scouring
4. sorting

Q. Rayon, casein fibre (from milk) and soya bean fibre etc. are examples of regenerated fibres.

1. True
2. False

Q. On the basis of the following features, identify the correct fibre.
I. They are polyesters.
II. These fibres can be woven into very fine fibres.
III. These fibres remain crisp and are easy to wash.

1. Optical fibres
2. Glass fibres
3. Blended fibres
4. Polyester fibres