Processing of Silk Fibre

Q. Why are cocoons boiled during the production of silk?

1. To kill the larvae inside the cocoon
2. To remove the dirt and grease
3. To store the cocoon for a long time
4. To seperate the soft and hard silk

Q.

Once silkworms produce cocoons, they are immediately transferred to boiling water. Explain why?

Q.

State whether the following statements are True or False. If false, correct them.

(a) Silkworms are caterpillars of the silk moth.

(b) In India, camels and goats are generally reared for obtaining wool.

(c) The rearing of silkworms for obtaining silk is called silviculture.

(d) In the process of obtaining wool from fleece, sorting is done after scouring.

(e) Yak hair is not used to make woolen fabric.

Q. Improper stifling of cocoons will smoothen the silk fibres that are obtained from it.

1. True
2. False

Q. Stifling helps to store cocoons for a long time.

1. False
2. True

Q. During the processing of silk fibres, the cocoons are boiled to kill the larvae.

1. True
2. False

Q. Identify the stage in the life cycle of silkworm shown in the image given below.

1. Cocoon
2. Larvae
3. Pupa
4. Adult moth

Q.

What are burrs?

Q. Name the process in which threads are taken out as a cocoon.

1. Scouring

2. Shearing

3. Reeling
4. Weaving

Q. Janvi is an animal activist. She does not prefer a particular fabric 'A' as it involves the killing of the animal from which it is obtained. Identify A.

1. Wool
2. Cotton
3. Silk
4. Jute

Q. Silk can be obtained from the cocoon of silkworms by the process of shearing.

1. True
2. False

Q. Which of the following natural fibres are obtained from animals?

1. Silk
2. Jute
3. Wool
4. Cotton

Q. Why do we boil the cocoons of a silkworm🦋🦋🦋🦋🦋🦋🦋🤔🤔🤔🤔🤔

Q. Neelima was concerned about killing the larvae by boiling the cocoon, while obtaining silk. Justify this process to Neelima by choosing the correct reasons from the given options.

1. To avoid breakage of silk strand
2. To strengthen the silk
3. To soften the cocoon
4. To remove dirt and grease

Q. Which of the following machines can be used for reeling?

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

Q. Identify yarn from the given images.

1. 
2. 
3. 
4. 

Q. During production of silk, ____________ are boiled to make it easier to unwind the silk and kill the pupae inside.

1. Eggs
2. Silkworm
3. Cocoon
4. Silk moth

Q. Silk can be obtained from the cocoon of silkworms by the process of shearing.

1. True
2. False

Q. The process of obtaining silk fibres from the cocoon is called.

1. weaving
2. reeling
3. crading

Q. During production of silk, ____________ are boiled to make it easier to unwind the silk and kill the pupae inside.

1. Eggs
2. Silkworm
3. Cocoon
4. Silk moth

Q. Which of the following fibres is incorrectly matched with the process involved in its extraction?​

Q. Which among the following is the correct order for the processing of silk?

1. Reeling $\to$ stifling $\to$ weaving
2. Stifling$\to$ reeling $\to$ weaving
3. Stifling$\to$ weaving $\to$ reeling
4. Reeling $\to$ weaving $\to$ stifling

Q. Neelima was concerned about killing the larvae by boiling the cocoon, while obtaining silk. Justify this process to Neelima by choosing the correct reasons from the given options.

1. To avoid breakage of silk strand
2. To strengthen the silk
3. To soften the cocoon
4. To remove dirt and grease

Q. Arrange the different stages of the lifecycle of silkworm in the correct order.

1. Egg
2. Larvae
3. Cocoon
4. Adult silk moth