AP 7th Class Science Important Questions 11th Lesson Fibres and Fabrics

These AP 7th Class Science Important Questions 11th Lesson Fibres and Fabrics will help students prepare well for the exams.

AP Board 7th Class Science 11th Lesson Important Questions and Answers Fibres and Fabrics

Question 1.
What are animal fibres ? Give examples.
Answer:

1. The fabrics that are derived from animals are called animal fibres.
2. Examples for animal fibres are silk and wool.

Question 2.
What are the sheep varieties from which we get fine quality wool?
Answer:

1. Marino sheep is the world famous breed for wool rearing.
2. Deccani sheep is reared for meat and wool in Andhra Pradesh.

Question 3.
Name the famous breeds of goats for obtaining wool.
Answer:

1. Angora goat is world famous for it’s wool, known as Mohair.
2. Cashmere is the goat variety which gives luxurious wool in India.

Question 4.
What jure the qualities of wool from camel?
Answer:

1. Camel produce coarse hair when compared to other animals like sheep and goats.
2. Though it is coarse, it has similar properties to wool. It is useful to make coats and blazers.

Question 5.
Where do people rear camels in India and why?
Answer:

1. Camels are reared in Rajasthan, Haryana and Gujarat states.
2. Camels are reared for milk, meat and wool.

Question 6.
Where do you find Yaks in India ? Why do people rear yaks?
Answer:

1. Yaks are found in Ladhak in India and Tibet.
2. Yaks are reared for milk, wool and meat.

Question 7.
How do we get colourful coats?
Answer:

1. Angora is a breed of rabbits with soft and white hair.
2. This fur is used to make colourful coats.

Question 8.
Name the animals which are reared in South America for yielding wool.
Answer:

1. Alpaca and Lama are reared in South America for yielding wool.
2. The wool derived from them is as fine as Mohair and is considered to be the best quality wool.

Question 9.
What is shearing?
Answer:
Removing fleece of animal along with the outer thin layer of skin is called shearing.

Question 10.
What is scouring?
Answer:
The removal of grease, dust and dirt from wool by washing the wool using detergents is called scouring.

Question 11.
How do we get colourful woolen clothes.?
Answer:

1. We get colourful woolen clothes by the process of Dyeing.
2. Fleece can be bleached to remove colours and then dyed in various colours.

Question 12.
What is carding? What is its use?
Answer:

1. The process of wrapping the fleece between the two surfaces to make the fibre into a fluffy roll is called carding.
2. It removes twigs and stings from fleece and make the wool into a fluffy mass.

Question 13.
What is spinning of wool?
Answer:
The process of winding together the fibres to form a yarn is called Spinning.

Question 14.
What is knitting?
Answer:

1. The process of making woolen garment is known as knitting.
2. Machines are. also used in making woolen garment.

Question 15.
What do you know about Parla village?
Answer:

1. Parla, a village located just 20 kms away from the Kurnool.
2. It is famous for fine quality woolen carpets.
3. Rearing sheep and making carpets is being practiced by the villagers for centuries as cottage industry.

Question 16.
What is cocoon?
Answer:

1. Soon after, silk worm completely covers its body with silk fibre. This looks like a capsule.
2. This capsule like structure formed now is called a cocoon.

Question 17.
What is sericulture? What is the position of Andhra Pradesh in the production of silk?
Answer:

1. Rearing of silk worms for obtaining silk is known as sericulture.
2. A.P. stood in second place in the production of silk in our country.

Question 18.
How can you say that sericulture is an Agro-based industry?
Answer:

1. Silk worms prefer to eat mulberry leaves.
2. So, mulberry crop is cultivated by farmers who run Agro-based Industry.

Question 19.
What are Chandrikalu?
Answer:
The specialized cane structures where larvae of silk worms are kept along with mulberry leaves are called Chandrikalu.

Question 20.
What is stifling? What is its use?
Answer:

1. The process of killing larvae inside the cocoon by putting them in steam is called stifling.
2. Stifling of cocoons provides better quality silk fabric. They can also be stored for a longer period and can be sold in market.

Question 21.
What is reeling of silk?
Answer:
The process of extracting threads from cocoons is called Reeling.

Question 22.
Mention the different varieties of silk.
Answer:
1) Mulberry silk 2) Eri silk 3) Muga silk 4) Tasar silk are the different varieties of silk obtained by different types of moths.

Question 23.
Silk obtained from wild varieties requires spinning. What is the reason for that?
Answer:

1. Silk threads obtained from wild varieties of silk moths are coarse and less lustrous.
2. Spinning is required as the threads obtained from the opened cocoons of wild silk moths is not continuous.

Question 24.
What is the silk city of Andhra Pradesh?
Answer:
Dharmavaram of Anantapur district is known as silk city of Andhra Pradesh.

Question 25.
Why should we wear clothes made of natural fibres?
Answer:
Wearing clothes made of natural fibres not only reflects our traditions and culture but also eco – friendly and helping hand to the weavers too.

Question 26.
Why silk is widely used as surgkal sutures?
Answer:

1. Surgical sutures are used to hold tissues together after a surgery and even for deep cuts.
2. Silk is widely used as sutures as it is easy to stitch and remove it due to its texture.

Question 27.
What are synthetic fibres? Give examples.
Answer:

1. Synthetic fibres are the fibres that are made of chemicals obtained from wood pulp or petroleum.
2. Examples are Acrylic, Rayon, Nylon, Polyster.

Question 28.
What do you know about Rayon?
Answer:

1. Rayon is also known as ‘artificial silk’ as the texture of fabric prepared by Rayon is just like silk.
2. Rayon is made from pulp.

Question 29.
The production of Nylon and Polyester leads to environmental pollution. Why?
Answer:

1. Even after their disposal, they won’t mix in soil. They cause soil pollution as they made of chemicals.
2. Recycling is the only solution to reduce the adverse effects caused by synthetic fibres.

Question 30.
Woolen clothes should be washed only after 4 to 5 wearings only. Why?
Answer:

1. It is because frequent washes may loosen the firmness of knitting resulting in loss of shape of fabric.
2. Even after washing, woolen clothes should not be squeezed.

Question 31.
Where do we find sheep or goat that give us wool?
Answer:
In Jammu & Kashmir, Himachal Pradesh, Uttaranchal, Arunachal Pradesh, Sikkim, Haryana, Punjab, Rajasthan and Gujarat. They are often reared on large farms.

Question 32.
What is roiling?
Answer:

1. The process of removal of shrinkage from silk clothes is called rolling.
2. It is the only method to remove shrinkage from silk clothes.

Question 33.
Why do people prefer to wear artificial fibres?
Answer:

1. Maintenance of clothes made of artificial fibres is comparatively easier.
2. They are cheaper and durable.
3. Hence, people prefer to wear artificial fibres.

Question 34.
What does the term ‘Thermoplastic’ mean?
Answer:

1. Thermoplastic means becomes soft on absorbing heat.
2. Artificial fibres are thermoplastic in nature.

Question 35.
Why are artificial fibres are not friendly to skin?
Answer:

1. Artificial fibres are generally made of chemicals.
2. Generally they are toxins. So, they mostly cause skin allergies.

Question 36.
Which type of fabrics are suitable for wearing masks to protect ourselves from COVID-19?
Answer:

1. WHO recommended three layered cotton mask to protect ourselves from COVID-19.
2. Masks made of natural fabric avoid skin allergies and itching caused by long time usage.

Question 37.
“Natural fabrics are symbols of aesthetic sense” – said Sravya. Do you agree this statement? Why?
Answer:

1. Yes, I agree with the Sravya’s statement.
2. Because the beauty, lustre and fine texture make them a symbol of aesthetic sense and pious feeling.

Question 38.
When do we wear cotton and woolen clothes in our daily life?
Answer:

1. We wear cotton clothes during summer to avoid heat. We feel cool after wearing the cotton clothes.
2. We buy and wear woolen clothes specially for winter.

Question 39.
What should be used in diapers and sanitary napkins in place of synthetic materials?
Answer:

1. If we use synthetic materials they may cause allergies on long term usage as they are made of harmful chemicals. They are harmful to environment also.
2. So, we should use skin friendly, eco-friendly liquid absorbent materials like cotton, banana or bamboo fibres, and water proof cotton like canvas to be used in diapers and sanitary napkins.

Question 40.
Fill up the blank and give your reasons for the statement.
………….. fabric protect us from cold.
Answer:
Woolen fabric protect us from cold. Because wool is a poor conductor of heat. Air trapped in between the woolen fibres and our body prevents the flow of heat from our body to surroundings.

Question 41.
What are the differences between fleece of Angora goat and Camel?
Answer:

Angora goat fleece	Camel fleece
1) Angora goat live in Kashmir.	1) Camel live in Rajasthan.
2) Angora goat have soft hair.	2) Camels have rough and coarse hair.

7th Class Science 11th Lesson Fibres and Fabrics Short Questions and Answers

Question 1.
How are we protected from heat and cold by wool?
Answer:

1. Wool is a poor conductor of heat. Air trapped in between the woolen fibres and our body prevents the flow of heat from our body to our surroundings.
2. So we feel hot and are protected from cold.
3. Woolen cloth also helps to do use fire.
4. That is why it is good to wrap a person, who is caught in fire, with a blanket.

Question 2.
Write a brief note on Ahimsa Silk?
Answer:

1. Ahimsa silk is the silk obtained in non-violent way of silkworm breeding.
2. In this method of preparation of silk fibre, the pupa of silk moth is allowed to hatch and the leftover cocoon is then used to derive silk.
3. This method was introduced and followed by Kusuma Rajaiaha, handloom technologist and former employee in A.R Handloom Department.

Question 3.
What are the silk cities of India? Why are they called so?
Answer:

1. Dharmavaram of Anantapuram district in A.R
2. Ramanagara – Karnataka
3. Surat – Gujarat
4. Chanderi – Madhya Pradesh
5. Kanchipuram – Tamil Nadu
6. Pochampalli – Telangana
7. aranasi – Uttar Pradesh

are known as ‘silk cities of India’, because of the high quality silk weaving industries established over there.

Question 4.
Write a brief note on Tasar Silk.
Answer:

1. Tasar silk is a variety of popular wild silk.
2. It is obtained from ‘Antheraea mylitta’.
3. This moth is generally grows on Arjuna and Sal trees of deep forests, in agency areas of East Godavari district.
4. Tribals collect cocoons and sell them in the market.

Question 5.
Write a short note on ‘Acrylic’?
Answer:

1. We wear sweaters and use shawls or blankets in winter.
2. Many of them are not usually made of natural wool.
3. These are prepared from a synthetic fibre called Acrylic.
4. Acrylic resembles wool in all aspects through available in cheaper price.

Question 6.
How should we protect silk and woolen fabrics from attacks of insects?
Answer:

1. Insects can readily feed on the protein substance present in fibres.
2. So, we should protect silk and wool fabrics by placing phenolphthalein ball which have strong fragrance.
3. Boric acid, fragrant oils like sandal oil and lavender oil can successfully repel the insects.
4. By keeping these substances between the clothes we can protect silk and woolen clothes from insects.

Question 7.
Write a brief note on Nylon.
Answer:

1. Nylon is the first fully synthetic fibre manufactured in 1931.
2. It was prepared from coal and water.
3. Nylon fibre is strong, elastic and light.
4. Socks, ropes, tooth brush bristles, tents are made from Nylon.
5. It is also used for making strong ropes for parachutes and those used for rock climbing.

Question 8.
Write a short note on polyester.
Answer:

1. Polyester does not get wrinkled easily.
2. Shirts and other common dresses commonly worn by people are made from polyester.
3. Terylene is a type of polyester used for sarees and dress materials.

Question 9.
What are the qualities of artificial fabrics?
(OR)
Why do most of the people prefer to wear artificial fabrics?
Answer:

1. Artificial fibres are light, soft and smooth.
2. They are more durable when compared to natural fabrics.
3. Maintenance of these fabrics is relatively easier.
4. These are available in cheaper price as their production is quite abundant and economical.

Question 10.
How do you remove shrinkage of silk sarees?
Answer:

1. To remove shrinkage silk sarees are being wrapped around a uniform wooden lag.
2. It is kept dried for six to eight hours.
3. Then they are allowed to steam iron.
4. This process of removal of shrinkage from silk clothes is called ‘Rolling’.

Question 11.
Explain the process of sorting wool.
Answer:

1. People sorting coarse and soft ones as well as broken and long ones and making separate piles of them.
2. Unwanted materials like twigs or bits of leaves etc., that may be present with the wool are also separated out.
3. This process is called sorting or wool classing. Fleece is the soft mass of wool.

7th Class Science 11th Lesson Fibres and Fabrics Long Questions and Answers

Question 1.
Mention the details of district wise sericulture units established in A.P..
(OR)
Give the details of sericulture units established in the districts of Andhra Pradesh.
Answer:

Name of the District	Region where Sericulture units are established
1. Srikakulam	Laveru, Etcherla
2. Vijayanagaram	Nellimerla
3. Visakhapatnam	Paderu
4. East Godavari	Kakinada,Chebrolu, Gollaprolu
5. West Godavari	Vijayarai
6. Krishna	Ghantasala
7. Guntur	Pedakakani, Bollapalli, Tadikonda
8. Prakasam	Giddaluru, Cumbham
9. Nellore	Marripadu, Kaligiri.Rapuru
10. Chittoor	Palamaneru, Madanapalle, Kuppam
11. Kadapa	Chennuru
12. Kurnool	Atmakur, Kothapalle, Pathikonda, Nandyala
13. Ananthapuram	Hindupur, Kadiri, Penugonda

Question 2.
How do you feel after wearing the fabrics made with natural fibres?
Answer:

1. We wear silk fabrics during special occasions like marriages, dinners etc. their beauty, lustre and fine texture make thefti a symbol of aesthetic sense and pious feeling.
2. We feel cool when we wear cotton clothes during summer.
3. We buy woolen clothes specially for winter.
4. Wearing clothes of natural fibres not only reflects our traditions and cultures but also eco-friendly and helping hand to the weavers too.

Question 3.
Radha wants to buy a silk saree. She wanted to know the purity of silk thread. She wanted to test silk fibre by burning. What procedure she would under take and which of the features would she observe while burning the silk thread of the saree?
Answer:

1. Get some threads of silk from a textile shop or a tailor shop.
2. Burn them on a candle flame.
3. Observe the flame and fumes coming from the fibres.

Observations:

1. Silk fibres burn slowly but not continuously when compared to plant fibres.
2. Silk fibres release fumes emitting the smell of burning hair or meat.
3. The ashes formed are black in colour and appear as beads and can be made as powder.

Inference: If all the above features are observed while burning the silk fibres, we can confirm that the tested fibres are pure silk fibres.

Question 4.
Write the differences between artificial fibres and natural fibres.
Answer:

Artificial fibres	Natural fibres
1) These are made from chemicals.	1) These are obtained from plants and animals.
2) These absorb less water.	2) They absorb more water.
3) These quickly dry off.	3) These dry off slowly.
4) These doesn’t wrinkle easily after washing.	4) These easily wrinkle after washing.
5) These are more durable when compared to natural fibres.	5) These are less durable when compared to artificial fibres.
6) Maintenance is easier.	6) Maintenance should be done carefully.
7) These are available in cheaper price.	7) These are costlier when compared to artificial fibres.
8) Their production is abundant.	8) Their production is scarce.
9) These are economical.	9) These are expensive.
10) These are not ecofriendly.	10) These are eco friendly.

Quesition 5.
Write a short note on synthetic fibres.
Answer:
Synthetic fabrics are made of chemical obtained from wood pulp and petroleum. The uses of some of the synthetic fibres are as follows :
1) Acrylic:
i) This resembles wool in all aspects. It is available in cheaper price.
ii) It is used to make sweaters and shawls or blankets in winter season.

2) Rayon:
i) It is known as artificial silk. It is made from wood pulp.
ii) Fabrics made with rayon resembles silk in their texture.

3) Nylon :
i) The first synthetic fibre made in 1931, known for its strength, elastic nature and light in weight.
ii) It is used to make socks, ropes, tooth brush bristles and tents.
iii) Strong ropes are made from Nylon, which are used in making of parachutes and rock climbing. It is prepared from coal and water.

4) Polyester:
i) It is widely used in manufacturing pants, shirts, dresses etc.
ii) It does not shrink after washing easily.
iii) Terelene is also a type of polyester used to make sarees and dress materials.

Question 6.
Write 5 differences between wool and silk manufacturing.
Answer:

Silk	Wool
1) The silk yarn is obtained from the cocoon of the silk moth.	1) The fleece of the sheep along with a thin layer of skin is removed from its body. This process is called shearing.
2) For obtaining silk, moths are reared and their cocoons are collected to get silk thread.	2) The sheared skin with hair is thoroughly washed in tanks to remove grease, dust and dirt. This is called scouring.
3) The process of taking out threads from the cocoon for use as silk is called reeling the silk.	3) The hairy skin is sent to a factory where hair of different textures are separated.
4) Tasar, Mooga, Kosa etc., are different varieties of silk.	4) The small fluffy fibres called burrs are picked out from the hair.
5) Silk fibres obtained by reeling the spun into silk threads, which are woven into silk cloth by the weavers.	5) Fibres are straightened, combed and rolled into yarn. The longer fibres are made into wool for sweaters and the shorter fibres are spun and woven into woolen cloth.

Question 7.
Do you find any similarities between silk and wool weaving ? What are they ?
Answer:

1. Both silk and wool weaving is done on power looms as well as on handlooms.
2. Woolen threads are ,stretched from the top of the loom to the bottom. These are called warp threads.
3. The threads that go side to side are weft threads.
4. A shuttle like a big needle takes the weft threads over and under warp threads.
5. One more important part of the loom is the harness.
6. The harness lifts every other warp thread so that the weft threads go over one and under the next.
7. All types of yarn whether cotton or silk or wool etc. are woven in this manner.

Question 8.
If you are going to visit Dal lake at Kashmir which type of clothes would you like to keep in your luggage? Why?
Answer:

1. In Kashmir, it would be very cold.
2. Unless one wears clothes to protect himself from this chill weather, It becomes difficult to carry on with the day to day activities.
3. Woolen clothes protect from chill weather.
4. The gap between the threads of the woolen cloth is filled with air.
5. Air and wool are bad conductors of heat. –
6. Woolen clothes are best to wear in Kashmir.
7. So I keep woolen clothes in my luggage when l am going to visit Kashmir.

AP Board 7th Class Science 11th Lesson 1 Mark Bits Questions and Answers Fibres and Fabrics

I. Multiple Choice Questions

Choose the correct answer and write its letters in the brackets.

1. Wool and silk fabrics are derived from
A) plants
B) animals
C) chemical
D) plants and animals
Answer:
B) animals

2. Which of the following is the common vafriety reared for meat and wool in Andhra Pradesh and Telangana and Karnataka?
A) Marino
B) Deccani
C) Angora
D) Cashmere
Answer:
B) Deccani

3. Which is the main source of wool production in Andhra Pradesh?
A) Sheep
B) Goat
C) Camel
D) Rabbit
Answer:
A) Sheep

4. Which gives luxurious wool in India?
A) Marino
B) Deccani
C) Angora
D) Cashmere
Answer:
D) Cashmere

5. Which is used to make wool?
A) Long hair
B) Outer long hair
C) Fleece
D) All of the above
Answer:
C) Fleece

6. How many stages are there in the process involved in manufacturing of woolen threads?
A) 4 stages
B) 5 stages
C) 6 stages
D) 8 stages
Answer:
C) 6 stages

7. Removing fleece of animal along with the outer thin layer of skin is called
A) Shearing
B) Scouring
C) Carding
D) Combing
Answer:
A) Shearing

8. The process of wrapping the fleece between the two surfaces to make the fibre into a fluffy roll is called ……………….
A) Shearing
B) Scouring
C) Carding
D) Combing
Answer:
C) Carding

9. Process of winding together the fibres to form a yarn is called ………………
A) Dyeing
B) Sorting
C) Carding
D) Spinning
Answer:
D) Spinning

10. Which stages is important of silkmoth for obtaining silk?
A) Egg
B) Larva
C) Pupa
D) Imago
Answer:
B) Larva

11. These are called silk worms.
A) Silk moths
B) Caterpillars
C) Imagoes
D) Pupas
Answer:
B) Caterpillars

12. Larva undergo changes and turns into an adult moth after
A) 10 days
B) 30 – 35 days
C) 10 – 12 days
D) 15 – 20 days
Answer:
C) 10 – 12 days

13. The place of Andhra Pradesh in the production of silk in the country is
A) First
B) Second
C) Third
D) Tifth
Answer:
B) Second

14. How much yarn can be yield by one cocoon?
A) 100 – 500 meters
B) 500 – 1000 meters
C) 500 – 1500 meters
D) 500 – 2000 meters
Answer:
C) 500 – 1500 meters

15. Which of the following is not a silk city in India?
A) Ramanagara
B) Surat
C) Pochampalli
D) Dharmagiri
Answer:
D) Dharmagiri

→ Look at the following flow chart and answer the questions 16 to 18.

16. Which of the following correctly represents A,B and C respectively?
A) A – Cotton fibre, B – Silk worm, C – Woolly dog
B) A – Jute fibre, B – Cocoon, C – Silk moth
C) A – Silk fibre, B – Tasar, C – Sheep
D) A – Synthetic fibre, B – Khadi, C – Sheep
Answer:
C) A – Silk fibre, B – Tasar, C – Sheep

17. Which of the following is not an application of ‘A’?
A) Clothing
B) Interior decoration
C) Painting
D) Construction
Answer:
D) Construction

18. Which of the following is related to ‘C’?
A) Angora
B) Marino
C) Mohair
D) Cashmere
Answer:
B) Marino

19. Assertion (A) : Scouring is the process of washing sheared fleece in hot water, detergent and alkali in tank
Reason (R) : Scouring removes dirt, grass and grease
A) Both A and R are true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A.
C) A is true but R is false.
D) A is false but R is true.
Answer:
A) Both A and R are true and R is the correct explanation of A.

20. Look at the figures given below. These figures show different steps in the production of wool A number from (I) to (vi) is written in each block. Find the correct order of figures.

A) (vi), (ii), (iv), (v), (iii), (i)
B) (vi), (v), (ii), (iv), (iii), (i)
C) (v), (vi), (iii), (ii), (iv), (i)
D) (vi), (iii), (ii), (iv), (i), (v)
Answer:
B) (vi), (v), (ii), (iv), (iii), (i)

21. A female moth lays around …………… of eggs.
A) tens
B) hundreds
C) thousands
D) lakhs
Answer:
B) hundreds

22. The cocoons have to be stiffled to kill …………… inside.
A) Eggs
B) Larva
C) Pupa
D) The worm
Answer:
B) Larva

23. Food for silk worms.
A) Mulberry leaves
B) Mango leaves
C) Coconut leaves
D) Jasmine leaves
Answer:
A) Mulberry leaves

24. The hair of animals collectively called
A) Fur
B) Skin
C) Fibre
D) None
Answer:
A) Fur

25. Fleece of sheep is removed from its body during …………… season.
A) Winter
B) Summer
C) Rainy
D) Spring
Answer:
D) Spring

26. After washing, …………… is passed over the wool to make it softer.
A) Steam
B) Grease
C) Cool air
D) Hot air
Answer:
C) Cool air

27. Silk is mainly
A) Carbohydrate
B) Worms
C) Protein
D) Cocoon
Answer:
C) Protein

28. The capsule like structure formed is known as ……………
A) Embryo
B) Larvae
C) Seeds
D) Cocoon
Answer:
D) Cocoon

29. Moths are also called ……………
A) Bombyx mori
B) Insects
C) Butterfly
D) Honey bee
Answer:
A) Bombyx mori

30. ………….. district is a silk city of Andhra Pradesh.
A) Guntur
B) Anantapuram
C) Kurnool
D) Krishna
Answer:
B) Anantapuram

31. Caterpillars feed bv leaves.
A) Grass
B) Leaves
C) Cocoon
D) Mulberry leaves
Answer:
D) Mulberry leaves

32. Chandrikalu means …………… .
A) Cane frames
B) Glass tubs
C) Cocoons
D) Mulberry huts
Answer:
A) Cane frames

33. Pupa stops eating after
A) 25 – 30 days
B) 30 – 35 days
C) 40 days
D) 10-12 days
Answer:
B) 30 – 35 days

34. Caterpillar secretes …………… substance.
A) Fibre
B) Cellulose
C) Starch
D) All the above
Answer:
A) Fibre

35. “Pattu kayalu” means
A) Silk worm
B) Cocoon
C) Seeds
D) Chandrikalu
Answer:
B) Cocoon

36. Adult moths come out from ……………
A) Eggs
B) Mulberry leaves
C) Seeds
D) Cocoon
Answer:
D) Cocoon

37. Which of the following is not required for getting silk yarn?
A) Weaving
B) Spinning
C) Reeling
D) Knitting
Answer:
C) Reeling

38. Special machines like reelers and twisters are used in ……………
A) Reeling
B) Spinning
C) Knitting
D) Weaving
Answer:
A) Reeling

39. Good quality of wool is given by ……………
A) Angora goat
B) Merino sheep
C) Lama
D) Camels
Answer:
B) Merino sheep

40. Rough and coarse hair is produced by
A) Goat
B) Sheep
C) Camel
D) Rabbit
Answer:
C) Camel

41. Scouring means removing of
A) Dust
B) Grease
C) Dirt
D) All of these
Answer:
D) All of these

42. The correct order is
1) Egg 2) Pupa 3) Adult 4) larva
A) 1, 2, 4, 3
B) 1, 4, 2, 3
C) 1, 3, 2, 4
D) 1, 4, 3, 2
Answer:
B) 1, 4, 2, 3

43. ‘Grinages’ are
A) Seed centers
B) Larva centers
C) Adult centers
D) Silk centers
Answer:
A) Seed centers

44. ‘Bombyx mori’ is a
A) Honey bee
B) Warsp
C) Housefly
D) Silk moth
Answer:
D) Silk moth

45. Killing of the silk moth larva’s is called
A) Reeling
B) Yarn
C) Stiffling
D) Silk
Answer:
C) Stiffling

46. The stiffling process takes place at
A) Reeling centers
B) Grinages
C) Chandrikalu
D) Horsely Hills
Answer:
A) Reeling centers

47. The process in the picture is
A) Stiffling
B) Reeling
C) Warping
D) Feeding
Answer:
A) Stiffling

48. The equipment show in the figure is
A) Cacoon
B) Chandrikalu
C) Reeling
D) Woven
Answer:
B) Chandrikalu

49. Fill the blank in the life cycle of silk moth

A) Pupa
B) Laren
C) Silk moth
D) Housefly
Answer:
A) Pupa

50. The country that used the silk for first time
A) India
B) China
C) Japan
D) America
Answer:
B) China

51. 1) Dyeing 2) Sorting 3) Scouring 4) Shearing
The correct order is
A) 4, 3, 2, 1
B) 2, 3, 4, 1
C) 4, 3, 1, 2
D) 3, 4, 2, 1
Answer:
B) 2, 3, 4, 1

52. Removing the colour of wool is
A) Bleaching
B) Sorting
C) Spinning
D) Scouring
Answer:
A) Bleaching

53. Making threads of yarn is
A) Spinning
B) Carding
C) Dyeing
D) Sorting
Answer:
A) Spinning

54. Which city is called silk city in our State?
A) Venkatagiri
B) Dharmavaram
C) Madanapalli
D) Hartuman Junction
Answer:
B) Dharmavaram

55. The first stage in making of woollen clothes.
A) Scouring
B) Sorting
C) Shearing
D) Bleaching
Answer:
C) Shearing

56. Fill the blank in the flow chart with the given answer.

A) Stiffling
B) Moths
C) Reeling
D) Chilakalu
Answer:
A) Stiffling

57. Material present in silk thread
A) Protein
B) Fat
C) Carbohydrate
D) Cellulose
Answer:
A) Protein

58. If you went to silk showroom to know the quality of silk, what type of exact question do you ask?
A) How do you decide the cost?
B) Do they have good durability?
C) How silk is prepared with?
D) How many types of silks are there?
Answer:
B) Do they have good durability?

59. In summer season what type of clothes do you wear?
A) Cotton, light colour
B) Woolen, Silk
C) Cotton, dark colour
D) Silk, Woolen
Answer:
A) Cotton, light colour

60. Animal fibre : protein :: plant fibre : ………….
A) Fat
B) Protein
C) Carbohydrate
D) Mineral
Answer:
C) Carbohydrate

61. Which of the following shows the correct sequence of processes in making woolen fabric?
A) Shearing – scouring – sorting – dyeing – combing – spinning
B) Scouring – spinning – combing – shearing – sorting – dyeing
C) Sorting – scouring – shearing – combing – spinning – dyeing
D) Shearing – dying – combing – spinning – scouring – sorting
Answer:
A) Shearing – scouring – sorting – dyeing – combing – spinning

62. Name the stages of silkworm weavers buy from sericulture industury.
A) Larva
B) Pupa
C) Eggs
D) Moth
Answer:
B) Pupa

63. Identify the process that helps to store the cocoons for a long time.
A) Boiling
B) Stiffling
C) Reeling
D) Weaving
Answer:
A) Boiling

64. The sericulture units present in Guntur district are at
A) Pedakakani
B) Bollapalli
C) Tadikonda
D) All the above
Answer:
D) All the above

65. Antheraea mylitta is a
A) Wild silk moth
B) Goat
C) Sheep
D) Camel
Answer:
A) Wild silk moth

66. Which of the following is the quality of animal fibres?
A) More water absorbants
B) Protein based
C) Burns slowly but not continuously
D) All the above
Answer:
D) All the above

67. Acrylic is used to make
A) Sweaters
B) Shawls
C) Blankets
D) AIL the above
Answer:
D) AIL the above

68. Which of the following is not made from chemicals?
A) Polyester
B) Terelene
C) Rayon
D) None
Answer:
C) Rayon

69. Fabrics made from this fibres does not get wrinkles easily …….
A) Acrylic
B) Rayon
C) Polyester
D) Nylon
Answer:
C) Polyester

70. Ropes for parachute are made from
A) Acrylic
B) Rayon
C) Nylon
D) Polyester
Answer:
C) Nylon

71. Which fabric is used to make sarees?
A) Nylon
B) Polyester
C) Terelene
D) Acrylic
Answer:
C) Terelene

II. Fill in the blanks

1. ……………….. goat is famous for wool.
2. ……………….. is the goat variety which give luxurious wool in India.
3. ……………….. animal shed their hair every year which has similar properties to wool.
4. Camels are reared in ……………….. states.
5. Camels are reared for ……………….. .
6. Yaks are found in ……………….. of India.
7. ……………….. breed of rabbit’s fur is used to make colourful coats.
8. The first step in the processing of fibres into wool is ……………….. .
9. Shearing is generally done during ……………….. season.
10. ……………….. is used for scouring of wool.
11. We get colourful woolen clothes by the process of ……………….. .
12. The process of wrapping the fleece between the two surfaces to make the fibres into a fluffy roll is called ……………….. .
13. ……………….. village is famous for quality woolen carpets in Kurnool district.
14. Cocoons are also known as ……………….. .
15. In four stages of silk moth ……………….. stage is important for obtaining silk.
16. Silk worms prefer to eat ……………….. .
17. The larvae are kept in specialized cane structures called ……………….. .
18. The process of killing larvae inside cocoon by putting them in steam is known as ……………….. .
19. The process of extracting threads from cocoon is called ……………….. .
20. The scientific name of silkworm is ……………….. .
21. W.H.O refers to ……………….. .
22. Animal fibres are dissolved in ……………….. .
23. ……………….. chemical is present in toilet cleaners, disinfectants and cloth whiteness.
24. ……………….. are kept in the clothes to protect them from insects.
25. ……………….. protein is present ip wool fibres.
26. ……………….. protein is present in silk fibres.
27. Rearing of silk worms for getting silk is known as ……………….. .
28. Masks made of ……………….. avoid skin allergies and itching caused by longtime usage.
29. WHO recommends a ……………….. layered cotton fabric mask to protect ourselves from ……………….. .
30. We buy woolen clothes specially for ……………….. .
Answer:
1. Angora
2. Kashmere
3. Camel
4. Rajasthan, Haryana and Gujarath
5. milk, meat and wool
6. Ladhak
7. Angora
8. shearing
9. Spring
10. detergent
11. dyeing
12. Carding
13. Parla
14. Pattukaayalu
15. Larva
16. Mulberry leaves
17. Chandrikalu
18. stiffling
19. Reeling
20. Bombyx mori
21. World Health Organization
22. Chlorine bleach
23. Sodium hypochlorite
24. ball of phenopthalene
25. Keratin
26. Fibroin
27. Sericulture
28. natural fabric
29. three, COVID -19
30. winter

III. Match the following.

1. Group-A Group – B 1. Tasar silk 2. Stiffling 3. Reeling 4. Marino 5. Angora a) Wool yielding sheep b) Wool yielding goat c) Wool yeilding camel d) Extracting silk threads e) Killing the larvae by steaming f) Arjuna and Sal trees
Answer:

2. Group – A Group – B 1. Acrylic [ 1 a) Sarees and terelene , 2. Rayon [ ] b) Doesn’t get wrinkless 3. Nylon [ ] c) Ropes for parachute 4. Polyester [ ] d) Artificial silk 5. Terelene [ ] e) Sweaters and shawls f) Rain coats
Answer:

3. Group – A Group – B 1. Rolling [ ] a) Sodium hypochlorite 2. Phenopthalene [ ] b) Wood pulp 3. Synthetic fibre [ ] c) Silk 4. Natural fibres [ 1 d) Acrylic 5. Rayon [ 1 e) Protection of clothes f) Silk sarees
Answer:

4. Group – A Group – B 1. Cashmere [ ] a) South America 2. Marino [ ] b) Jammu and Kashmir 3. Yak [ ] c) Rajasthan 4. Camel [ ] d) Ladhak 5. Lama [ ] e) Australia f) South Africa
Answer:

5. Group – A Group – B 1. Silk city in A.P. [ 1 a) Ramanagara 2. Silk city in T.S. [ ] b) Chanderi 3. Silk city in Karnataka [ ] c) Pochampalli 4. Silk city in Tamil Nadu [ ] d) Surat , 5. Silk city in Madhya Pradesh *. [. ] e) Dharmavaram f) Kanchipuram
Answer:

Do you know?

→ Alpaca and Lama are long haired animals reared for wool in South America for yielding wool and they resemble camel. The wool derived from them is as fine as Mohair, that is considered to be the best quality wool.

→ Wool fibres grow from small sacs or follicles in the skin of the sheep just like our hair. The fibre is a dead material, just like horn, nail and feathers.

→ Parla, a village located just 20 kms away from the Kurnool is famous for fine quality woolen carpets (Kambaliu). Rearing sheep and making carpets is the major occupation of the villagers. It is being practiced by the villagers for centuries as cottage industry.

→ Lotus silk is obtained from lotus stem fibres. It is also known as the natural micro fibers. Anti microbial fabric from lotus is amazingly resistant, soft, light weight and wrikle free. Banana fiber is obtained from banana fiber which is considered as world’s strongest fiber.

→ Ahimsa silk is the silk obtained in non-violent way of silkworm breeding. In this method of preparation of silk fibre; the pupa of silk moth is allowed to hatch and the leftover cocoon is then used to derive silk. This method was introduced and followed by Kusuma Rajaiah, Handloom Technologist and a former employee in Andhra Pradesh Handloom Department. But getting silk through this process is expensive.

→ Tasar silk is a variety of popular wild silk obtained from silk moth scientifically named Antheraea mylitta. The silk moth generally grows on Arjuna and Sal trees of deep forests in agency area of East Godavari District. Tribals collect cocoons and sell them in the market. ITDA strives to create market for cocoons and to train tribals in reeling the cocoons to earn more money.

→ Surgical sutures are used to hold tissues together after a surgery and even for deep cuts. Silk is widely used for sutures as it is easy to stitch and remove it due to its texture.

→ Diapers and Sanitary napkins are completely made of synthetic materials. They harm the skin on long term usage and they are harmful to the environment. To overcome this we have to think about environmental friendly and skin friendly, liquid absorbant materials like Cotton, banana or bamboo fibres and water proof cotton like canvas cotton to be used in diapers and sanitary napkins.