Question

D. Essay Type Questions:
1. Explain how jute is obtained from its plants.
2. How is the cotton flower processed to obtain fibre ?
3. Explain the requirements for growing cotton crop.
Write any four uses of synthetic fibres.
5. Differentiate between :
(a) Yarn and Fabric.
(b) Fibre and Yarn
6. Explain how do we obtain fibres used in winters.
7. Explain the process of shearing and sericulture.
8. Write few properties of cotton fibre.
9. Write some advantages and disadvantages of jute.
10. Write any two uses of jute.​

Answer 1

Explanation:

Explain how jute is obtained from its plants

The jute fiber comes from the stem and ribbon (outer skin) of the jute plant. The fibers are first extracted by retting. The retting process consists of bundling jute stems together and immersing them in slow running water. ... After the retting process, stripping begins; women and children usually do this job.

Explain the requirements for growing cotton crop.

Cotton is a plant that needs a long frost-free period, a lot of heat and plenty of sunshine. It prefers warm and humid climate. Cotton seeds will have a small germination rate, if the soil temperature is below 60°F (15°C). During active growth, the ideal air temperature is 70 to 100°F (21-37°C).

Answer 2

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1. Explain how jute is obtained from its plants.

The jute fiber comes from the stem and ribbon (outer skin) of the jute plant. The fibers are first extracted by retting. The retting process consists of bundling jute stems together and immersing them in slow running water. There are two types of retting: stem and ribbon.

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2. How is the cotton flower processed to obtain fibre ?

Harvesting is carried out by handpicking the cotton boll from the field or by automatic harvesting using a spindle picker. The process involved in separating cotton fibre from seeds is called ginning. The fibre then undergoes processes such as opening, blending, cleaning, carding, combing and so forth.

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3. Explain the requirements for growing cotton crop.

Cotton is a plant that needs a long frost-free period, a lot of heat and plenty of sunshine. It prefers warm and humid climate. Cotton seeds will have a small germination rate, if the soil temperature is below 60°F (15°C). During active growth, the ideal air temperature is 70 to 100°F (21-37°C).

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4. Write any four uses of synthetic fibres.

Rayon:- Inthe medical field for making bandages and surgical dressings. b. In making bed sheets, curtains, blankets etc.

Nylon:- Used in making socks, tents, toothbrushes, car seat belts, curtains, etc.

Polyester:- In making the fabrics for the sarees, dress materials and curtains.

Acrylic:- Used for making sweaters,shawls,blankets,jackets,sportswear,socks.

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5. Differentiate between :

(a) Yarn and Fabric.

A cloth is a flexible woven material consisting of network of natural or artificial fibres is referred to as thread or yarn. Yarn is produced by spinning raw fibres of wool,flax or cotton. Fabric is a cloth typically produced by weaving or knitting fibres.

(b) Fibre and Yarn.

Fibres are obtained from natural sources such as cotton, wool etc. Yarn is obtained by braiding different fibres together.

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6. Explain how do we obtain fibres used in winters.

Fibres are obtained from natural sources such as cotton, wool etc. Yarn is obtained by braiding different fibres together.

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7. Explain the process of shearing and sericulture.

Shearing:- A thin layer of skin is called shearing. It is done using machines similar to those used by barbers to remove hairs.

Sericulture:- The rearing of silkworms for obtaining silk is called sericulture.

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8. Write few properties of cotton fibre.

Cotton fibers are natural hollow fibers; they are soft, cool, known as breathable fibers and absorbent. Cotton fibers can hold water 24–27 times their own weight. They are strong, dye absorbent and can stand up against abrasion wear and high temperature. In one word, cotton is comfortable.

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9. Write some advantages and distadvantages of jute.

The crease resistance of Jute is very low. Drape Property is not good enough. Create Shade effect and becomes yellowish if sunlight is used. If Jute is wetted it lose it's strength.

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10. Write any two uses of jute.

Jute is the second most important vegetable fiber after cotton due to its versatility. Jute is used chiefly to make cloth for wrapping bales of raw cotton, and to make sacks and coarse cloth. The fibers are also woven into curtains, chair coverings, carpets, area rugs, hessian cloth, and backing for linoleum.

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