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Fibre to fabric - II

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Small fluffy fibres in the hair of sheep are called

  1. burr

  2. fur

  3. dust

  4. wool


Correct Option: A
Explanation:

The small fluffy fibers called burrs, found in the hair of sheep are removed by hand picking. These are the same fibers which sometimes appear on our sweaters.

Why pulling of hair causes pain, but trimming of hair does not?

  1. Hair are living but the roots of hair are attached to dead follicles.

  2. Hair are dead but the roots of hair are attached to living follicles.

  3. Pulling of hair applies force on our head.

  4. Pulling of hair and its trimming has no relation to each other.


Correct Option: B
Explanation:

Hair are dead structures so their trimming does not cause pain but the roots of hair are attached to the under scalp by living follicles. When hair is pulled, the living follicle comes out which gives a pain. 

What is a cocoon made up of?

  1. Fats

  2. Carbohydrates

  3. Proteins

  4. Minerals


Correct Option: C
Explanation:

Caterpillar in its next stage, called pupa, secretes protein fibres which harden on exposure to air and become silk fibres, which is soon fully formed and the covering is known as cocoon.

What kind of wool is obtained from Marwari breed of sheep?

  1. Good quality wool

  2. Brown fleece

  3. Coarse wool

  4. Carpet wool


Correct Option: C
Explanation:

Coarse wool is obtained from Marwari breed of sheep.

Which of the following is a fire proof plastic?

  1. Teflon

  2. Melamine

  3. Polythene

  4. Polystyrene


Correct Option: B
Explanation:

Melamine is a fire proof plastic.

Where are silk worms kept for rearing?

  1. In water

  2. Bamboo tray

  3. On paper

  4. Cardboard


Correct Option: B
Explanation:

Silkworms are reared by keeping the caterpillar in clean bamboo trays along with freshly chopped mulberry leaves.

Which of the following plastics is used for non-stick coating on cookware?

  1. Melamine

  2. Teflon

  3. Bakelite

  4. Nylon


Correct Option: B
Explanation:

Teflon  is used for non-stick coating on cookware.

Which of the following is used to make pashmina shawls?

  1. Fur of yak

  2. Fur of Kashmiri goat

  3. Fur of clama

  4. Fur of alpaca


Correct Option: B
Explanation:

The underfur of Kashmiri goat is soft. It is woven into fine shawls called pashmina shawls.

What is the process of washing sheared skin along with hair, to remove dust, called?

  1. Sorting

  2. Rearing

  3. Scouring

  4. Knitting


Correct Option: C
Explanation:

Removal of the hair from the sheep`s body is the first step of processing fiber into wool and is known as shearing. The sheared skin with hair is washed to remove grease, dust etc., the process is known as scouring. This hairy skin is sent to factory to separate different texture. This process is known as sorting.

Which of the following involves the cultivation of mulberry leaves and rearing of silkworms for the production of silk?

  1. Apiculture

  2. Silviculture

  3. Floriculture

  4. Sericulture


Correct Option: D
Explanation:

Sericulture involves silk production by the cultivation of mulberry leaves and rearing silkworms.

Bamboo is an important requirement in sericulture. What are its uses in sericulture? (i) Making trays for feeding larvae. (ii) Making montages for the production of cocoons. (iii) Making chambers for storing eggs. (iv) Making tools for unwinding threads.

  1. Only (i) and (iii)

  2. Only (i) and (ii)

  3. Only (ii) and (iii)

  4. Only (ii) and (iv)


Correct Option: B
Explanation:

Bamboo trays are used for feeding the larvae with mulberry leaves. Also, montages are formed in a bamboo tray to which cocoon gets attached.

Pupa swings its head from side to side in the form of figure of ______

  1. three

  2. nine

  3. eight

  4. zero


Correct Option: C
Explanation:

Silkworm grows in size and when the caterpillar is ready to enter the next stage of its life cycle called ‘pupa’, it swings its head from side to side in the form of figure of 8.

In which Indian state, Bakharwal sheep are common for woolen shawls?

  1. Rajasthan

  2. Haryana

  3. Punjab

  4. Jammu and Kashmir


Correct Option: D
Explanation:

Bakharwal, the Indian breed of sheep, the wool obtained from which is used for making shawls is found typically in Jammu and Kashmir. Whereas, Lohi is a typical Indian breed found in Rajasthan and Punjab, and Nali being found in Haryana. 

Which of the following is not a thermosetting plastic?

  1. Polyurethane

  2. Polyvinyl chloride

  3. Bakelite

  4. Melamine


Correct Option: B
Explanation:

Polyvinyl chloride  is not a thermosetting plastic.

What is the process of taking silk threads out from cocoon called?

  1. Rearing

  2. Reeling

  3. Shearing

  4. Scouring


Correct Option: B
Explanation:

To obtain silk from cocoon, cocoon may be exposed to sun or boiled. It can also be exposed to steam to separate the fibers. Then, the threads from cocoon to use them as silk are taken out. This process is known as reeling the silk.

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