Question

Class 7 Science MCQ Question of Fibre to Fabric with Answers?

Answer 1

Students can practice the free MCQ Questions for Class 7 Science Fibre to Fabric with Answers is available here. Revise all the concepts easily by taking help from the MCQ Questions for Class 7 Science with Answers are prepared based on the latest exam pattern. Students can refer to these MCQ Questions for Class 7 with Answers and assess their preparation level.

Here you will find  MCQ Questions for Class 7 science with Answers prepared by our experts based on the important new syllabus as per CBSE. This may assist you to understand and check your knowledge about the chapters. Students also can practice a free test of the Multiple Choice Questions of Class 7 science. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

Practice MCQ Questions for Class 7 Science

1. Which one of the following is not a breed of sheep?

(a) Murrah
(b) Marwari
(c) Lohi
(d) Nali

2. What is the scientific name of mulberry tree?

(a) Magnifera indica
(b) Morus alba
(c) Desmodium girence
(d) None of these

3. Silk is derived from

(a) cocoon
(b) pupa
(c) egg
(d) moth

4. Selective breeding is a process of

(a) selecting the offspring with desired properties.
(b) selecting the parents with desired properties.
(c) selecting an area for breeding.
(d) selecting fine hair for good quality wool

5. The general process that takes place at a sheep shearing shed is:

(a) removal of fleece
(b) separating hair of different textures
(c) washing of sheep fibre to remove grease
(d) rolling of sheep fibre into yam

6. The rearing of silkworms for obtaining silk is called:

(a) cocoon
(b) silk
(c) sericulture
(d) silviculture

7. Which of the following is not a type of silk?

(a) Mulberry silk
(b) Tassar silk
(c) Mooga silk
(d) Moth silk

8. Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. Which of the following would be the right gift for her to buy?

(a) Woollen shawl
(b) Silk scarf
(c) Animal fur cap
(d) Leather jacket

9. Wool fibre cannot be obtained from which of the following?

(a) Goat
(b) Llama
(c) Alpaca
(d) Moth

10. Fibres obtained from plants and animals are called:

(a) man made fibres
(b) natural fibres
(c) organic fibres
(d) none of these

11. The process of taking out threads from the cocoon for use as silk is called:

(a) reeling the silk
(b) reeling silk worms
(c) both of them
(d) none of these

12. For obtaining silk, mothe are reared and their cocoons are collected to get:

(a) silk threads
(b) silkworms
(c) both silk threads and silk worms
(d) none of these

13. Which of the following materials is/are used for clothing in ancient times?

(a) Animal skins
(b) Leaves
(c) Vines
(d) All of these

14. Silk worms are made of:

(a) protein
(b) vitamins
(c) minerals
(d) all of these

15.  Silk industry began in:

(a) China
(b) India
(c) Japan
(d) Korea

16. They eat day and night and increase enormously in size are named as:

(a) caterpillars
(b) honey bee
(c) butterfly
(d) none of these

17. Angora goats are found in

(a) Delhi and U.P
(b) Jammu and Kashmir
(c) Punjab and Goa
(d) Arunachal Pradesh and Karnataka

18. Yak wool is common in

(a) india
(b) america
(c) tibet
(d) china

19. Weavers weaves the silk thread into

(a) Silk yarn
(b) Silk fleece
(c) Silk cloth
(d) Silk cotton

20. Llama and Alpaca found in:

(a) South America
(b) South America
(c) Africa and South America
(d) None of these

21. In which of the following processes new offspring with special characters is produced by selecting parents?

(a) Translation
(b) Selective breeding
(c) Separating
(d) Rearing

22. Sheep are

(a) herbivores
(b) omnivores
(c) carnivores
(d) parasite

23. Best quality of wool is obtained from

(a) Merino sheep
(b) Goat
(c) Paschimini sheep
(d) Kashmiri sheep

24. Which bacterium causes a fatal blood disease ?

(a) Rhizobium
(b) Anthrax
(c) Both rhizobium and anthox
(d) None of these

25. Which of the following wool-yielding animal is suitable for making Pashmina shawls?

(a) Kashmiri goat
(b) Angora goat
(c) Llama
(d) Alpaca

Answer 2

1. Answer: (a) Murrah

Explanation: Murrah is not a breed of sheep.

2. Answer: (b) Morus alba

Explanation: ​​​​​​Bombyx mori is the scientific name of the silk moth. The silkworm is actually the larva or caterpillar of a silk moth. The silk moth commonly lays its egg on Mulberry true. The scientific name of Mulberry Tree is Morus alba.

3. Answer: (a) cocoon

Explanation: In commercial use, silk is almost entirely limited to filaments from the cocoons of domesticated silkworms (caterpillars of several moth species belonging to the genus Bombyx).

4. Answer: (b) selecting the parents with desired properties.

Explanation: Selective breeding is the process of crossing of two selected varieties having different traits to produce a hybrid having good traits of both, e.g., some breeds of sheep possess only soft under-hair.

5. Answer: (a) removal of fleece

Explanation: In shearing, the hair of sheep is removed along with fleece. Sheep shearing is the process by which the woolen fleece of a sheep is cut off. The person who removes the sheep's wool is called a shearer. Typically each adult sheep are shorn once each year. The annual shearing most often occurs in a shearing shed, a facility specially designed to process often hundreds and sometimes more than 3,000 sheep per day.

6. Answer: (c) sericulture

Explanation: The rearing of silkworms for obtaining silk is called 'sericulture'. Thus, meaning of sericulture or silk farming is the cultivation of silkworms or silk moths to produce silk. Sericulture is a very old occupation in India.

7. Answer: (d) Moth silk

Explanation: There are four types of natural silk produced around the world: Mulberry silk, Eri silk, Tasar silk and Muga silk. Mulberry silk contributes around as much as 90% of silk production, with the mulberry silkworm generally being regarded as the most important.

8. Answer: (a) Woollen shawl

Explanation: obtained from wool which does not required killing of animals. Wool is obtained from hairs of sheep, yak, camel, goat etc.

9. Answer: (d) Moth

Explanation: Animals that yield wool are Angora goats, Llama and Alpaca. Silkmoth lays eggs which develop into silkworms to yield silk but not wool.

10. Answer: (b) natural fibres

Explanation: Fibres obtained from plants and animals are called natural fibres. e.g Silk Wool.

11. Answer: (a) reeling the silk

Explanation: The process of taking out threads from the cocoon for use as silk is called reeling the silk. Reeling is done in special machines, which unwind the threads or fibers of silk from the cocoon.

12. Answer: (a) silk threads

Explanation: For obtaining silk, moths are reared and their cocoons are collected to get silk threads. keep eggs under hygienic conditions and under suitable conditions of temperature and humidity. The eggs are warmed to a suitable temperature for the larvae to hatch from eggs.

13. Answer: (d) All of these

Explanation: In ancient times, barks and big leaves of trees or animal skins and furs were used by people to cover themselves. The first material used for clothing is the natural fibres obtained from both plants and animal sources. These include cotton, flax, wool, leather, silk, etc.

14. Answer: (a) protein

Explanation: The caterpillar/ silkworm secretes fibre made of a protein which get hardened on being exposed to air and become silk fibre. Silkworm completely covers itself by silk fibres and this covering is called cocoon which is further processed to obtain silk fibres.

15. Answer: (a) China

Explanation: The origin of silk production and weaving is ancient and clouded in legend. The industry undoubtedly began in China, where, according to native record, it existed from sometime before the middle of the 3rd millennium bce.

16. Answer: (a) caterpillars

Explanation: Caterpillars eat day and night and increase enormously. India is the place where mostly sheep are reared for getting wool. Protein makes the silk worm. Morus Alba is scientific name of mulberry.

17. Answer: (b) Jammu and Kashmir

Explanation:  Angora goats found in the state of Jammu & Kashmir in India. These are a breed of domesticated goat that produce the lustrous fibre known as mohair.

18. Answer: (c) tibet

Explanation: Yak fiber is a term widely used to refer to yak fiber wool produced from yak coat fur (Bos grunniens), a long-hair bovine found mainly in the Tibetan plateau, Himalayan region, and in parts of Central Asia and Mongolia. Hence, the yak wool is common in Tibet.

19. Answer: (a) Silk yarn

Explanation: “Silk fibres are then spun into silk threads, which are woven into silk cloth by weavers”.

20. Answer: (a) South America

Explanation: Llama and Alpaca are domesticated South American camelids. The wool produced from llama is very soft and lanolin free. Alpaca is known for its fibers used for knitted and woven items, similar to wool.

21. Answer: (b) Selective breeding

Explanation:The process of selecting parents for obtaining special characters is called selective breeding.

22. Answer: (a) herbivores

Explanation: Sheep are herbivores, which means their diet does not include meat. They typically eat seeds, grass and plants.

23. Answer: (a) Merino sheep

Explanation: Bharat Merino is the high quality wool of same property obtained from the sheep breed produced at Central Sheep and Wool Research Institute, Avikanagar in India. So in India Bharat merino is the best quality of wool. The reason being its good fiber diameter, crimp, yield, color, and staple strength.

24. Answer: (b) Anthrax

Explanation:  Anthrax disease is caused by Bacillus anthracis. It causes cutaneous infection. This disease is common in dock workers who carry loads. The Rhizobium is fungi and the Clostridium coliform are bacteria related. 

25. Answer: (a) Kashmiri goat

Explanation: Kashmiri goat is the wool-yielding animal suitable for making Pashmina shawls.

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