The hairs of camel, llama and alpaca are processed to yield wool. Silk fibres are spun into silk threads. Weavers weave silk threads into woollen cloth. A pile of cocoons is used for obtaining silk fibres.
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Which of the following fibres are made into wool for sweater?
Since, acrylic resembles wool so it is also known as artificial wool or synthetic wool. Acrylic is cheaper than natural wool and can be dyed in various colour. Thus acrylic is very popular and taking the place of wool today. Acrylic is used in making sweaters, blanket, and other many clothes.
Which of the following fibres are made into wool for sweaters short or long?
The longer fibres are made into wool for sweaters and the shorter fibres are spun and woven into woollen cloth. Step II: The sheared skin with hair is thoroughly washed in tanks to remove grease, dust and dirt. This is called scouring. Nowadays scouring is done by machines [Fig.
Which of the following fibres are made into wool for sweaters a shorter fibres b longer fibres C both A and B?
(b) longer fibres are made into wool for sweaters
Shorter fibres: Glass fibre and carbon fibre are the most prevalent types of fibres used in short fibre thermoplastics.
What is wool fibre Class 7?
Wool is a textile fibr obtained from sheep and some other animals, including cashmere and mohair from goats, qiviut from muskoxen, angora from rabbits, and other types of wool from camelids.
What fibre is used in sweaters?
Acrylic fiber
Acrylic fiber is used to make a sweater and blankets. This acrylic fiber is made of acrylonitrile monomer. The polymer is known as polyacrylonitrile. This polymer is similar to wool, which is why it is known as synthetic wool.
What are the uses of wool Class 7?
Uses of Wool
- Woollen clothes.
- Blankets.
- Boots.
- Saddle cloths.
- Horse Rugs.
- Seat covers.
What is sorting of wool Class 7?
The process of separating the fleece of a sheep into sections according to the quality of woollen fibres is called sorting. The same quality wool obtained from the fleece of large number of sheep are then mixed together.
What is fibre Class 7 short?
The fibres are straightened, combed and rolled into yarn. The long woollen fibres are spun (or twisted) into thick yarn called wool which is used for knitting sweaters, etc. The short woollen fibres are spun into fine yarn and then woven on a loom to make woollen clothes (like shawls, etc).
Why do we dye wool fibres in different Colours in Class 7?
Grading: Wools are grouped according to their colour, length and texture. Burrs are separated from the fleece in this process. 4. Dyeing: Wool is dyed in different colours because the natural colour of the fleece is brown, black or white.
Which part of black sheep has wool for Class 7?
(a) The skin of the black sheep has fur like hairs mainly at the back and abdomen, known as wool.
What happens when wool fibre is burn Class 7 Mcq?
Mulberry Silk is the main variety of silk produced in India. [C]. When wool fibres burnt, it gives sizzling noise, smell like burning hair and curl away from flame.
What is carding of wool Class 7?
Wool carding is the process of brushing the wool fibres to organize them. It creates a continuous web of fibres that can be layed out flat into batting, rolled into rovings, or split into spinning rolls.
Which one of the following is a wool yielding animals Class 7?
Animal fibres of Class 7. Wool comes from sheep, Llama, Camel, Alpaca, Angora goat, goat, yak and some other animals. These wool-acquiescent animals bear hair on their body.
How is wool obtained from sheep for Class 7?
The fleece of the sheep along with a thin layer of skin is removed from its body, this process is called as shearing.
How many types of fibres are found in sheep class 7?
A sheep’s body has two types of fibres that form its fleece -the coarse beard hair and the fine soft under hair close to skin. The fine inner hairs are used to produce wool. There are different breeds of sheep in our country.
What is a sweater made of?
A sweater is a top made of knitted or crocheted material that often features long sleeves. Sweaters can be made from a range of fabric options, including cotton or synthetic materials, though they were traditionally made from wool.
Which of these is used to make sweaters?
Sweaters were traditionally made from wool but can now be made of cotton, synthetic fibers, or any combination of these.
Nomenclature.
| Article of Clothing | US | UK |
|---|---|---|
| Sleeveless knit garment | sweater vest, slipover | slipover, tank top |
| Sleeveless undershirt | tank top | vest, singlet |
Why is wool used to make sweater?
Wool has several qualities that distinguish it from hair or fur: it is crimped and elastic. Wool fabrics clean easily. Wool also absorbs moisture and insulates against heat and cold.
How does wool fibre keep our body warm Class 7?
Answer: Woollen clothes comprise slots or spaces between their fibres that can easily trap the air inside. This trapped air being the bad conductor of heat does not allow the body heat to escape. Thus, it helps in keeping the body warm.
What is cotton wool class 6?
Cotton Wool: The lumps of cotton fibres are called cotton wool. It can be used as an absorbent, filling quilts, pillows, etc., and making yam. Fabric: The material made by weaving the threads from fibres is called fabric.