Class 7 Science Chapter 3 MCQ

Class 7 Science Chapter 3 MCQ (Multiple Choice Questions) of Fibre to Fabric. There are about 20 sets of MCQ tests, each test containing 5 questions with answers and explanation of answers updated for new academy session 2021-22.

These questions are design in such a way, it covers all the important questions, intext questions and keywords of the chapter 3 of class 7 Science.

Class 7 Science Chapter 3 MCQ for 2021-22

Class:7
Subject:Science
Contents:Multiple Choice Questions – MCQ Tests

Class 7 Science Chapter 3 MCQ Tests

Class 7 Science Chapter 3 MCQ tests with answers and explanation are given below. It provides the complete revision for 7th Science Chapter 3. Every time starts a new test, when you click the button Start a New Test. After attempting 3 or 4 tests out of these 20 tests, you will feel confident about this chapter. It will also help in solving doubts related to Chapter 3 of grade 7 Science.




Q1

The silkworm is

[A]. A caterpillar
[B]. A larva
[C]. Both a caterpillar and a larva
[D]. Neither caterpillar nor larva
Q2

Which is the world’s best-known textile fibre brand?

[A]. Air Skin
[B]. Wide Plus Fabrics
[C]. Wool Dura
[D]. Wool Mark
Q3

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
Q4

Paheli wants to know the name of the breed which is famous for good quality of wool?

[A]. Lohi
[B]. Marwari
[C]. Nali
[D]. Patanwadi
Q5

What happened when wool fibre is burn

[A]. It produces a sizzling noise
[B]. It smells like burning hair
[C]. It curls away from the flame
[D]. All the above




Q6

Which country is the second largest producer of silk in the world?

[A]. India
[B]. Australia
[C]. South America
[D]. China
Q7

The general process that takes place at a sheep shearing shade 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 yarn
Q8

Which of the following statement is or are incorrect?

[A]. Wool fibre is made up of proteins and silk fibre is also made up of proteins.
[B]. 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.
[D]. None of the above.
Q9

What do you mean by “Raw silk”?

[A]. When the cocoons are kept under the sun or boiled or exposed to steam condition.
[B]. When caterpillar just completed cover (itself) by protein fibres.
[C]. When cocoons are dyed in beautiful colours after boiling process.
[D]. None of the above.
Q10

“Boojho wants to know the name of silk producing state(s) in India”. Select the correct option.

[A]. Karnataka
[B]. Andhra Pradesh
[C]. Tamil Nadu
[D]. All the above.




Q11

Read the following statements carefully and choose the incorrect sentence(s)?

[A]. Can we say that cotton fibre is form of carbohydrate.
[B]. Can we say that silk fibre is a form of protein.
[C]. Can we say that jute fibre is a form of fat.
[D]. Can we say that wool fibre is a form of protein.
Q12

Paheli wants to know the name of wool producing countries in the world?

[A]. Australia
[B]. New Zealand
[C]. South Africa
[D]. All of the above
Q13

Silkworms secrete fibre made of

[A]. Fat
[B]. Cellulose
[C]. Protein
[D]. Nylon
Q14

Which of the following statement is or are incorrect?

[A]. Silk worms are caterpillars of silk moth.
[B]. Sheep hair is sheared off from the body, scoured, sorted, dried, dyed, spun and woven.
[C]. In India mostly sheep, goat and yak are reared for getting wool.
[D]. None of the above.
Q15

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.



Q16

The rearing of silkworms for obtaining silk is called

[A]. Cocoon
[B]. Silk
[C]. Sericulture
[D]. Silviculture
Q17

Paheli wants to know the name of the wool producing states in India?

[A]. Arunachal Pradesh
[B]. Sikkim
[C]. Haryana
[D]. All the above
Q18

Which of the following is not a type of silk?

[A]. Mulberry Silk
[B]. Tassar Silk
[C]. Mooga Silk
[D]. Moth Silk
Q19

Boojho wants to know why caterpillars need to shed their skin but we humans do not?

[A]. When they take vitamin-D
[B]. When they grow bigger
[C]. When they are allowed to die
[D]. All the above.
Q20

Which of the following statement is or are incorrect?

[A]. In the process, of obtaining wool from fleece, sorting is done after scouring.
[B]. The rearing of silkworms for obtaining silk and their rearing, breeding is called silviculture.
[C]. The small fluffy fibres are picked out from the hair, called burrs.
[D]. The longer fibres are made into wool for sweaters.




Q21

Read the following statement about wool yielding animals and choose the incorrect sentence.

[A]. Angora wool is used to make woolen carpet.
[B]. Camel wool is used to make baby blanket.
[C]. Sheep wool is used to make push-mina shawl.
[D]. All the above.
Q22

Boojho wants to know the wool producing states in India, from the given options?

[A]. Jammu and Kashmir
[B]. Himachal Pradesh
[C]. Uttarakhand
[D]. All the above
Q23

Paheli wants to know that generally in which situation bleaching and dyeing of silk fibres (adding colours) are usually done?

[A]. Before the yarns are made into fibres.
[B]. After the yarns are made.
[C]. Before the fabrics are made.
[D]. After the fabrics are made.
Q24

Boojho wants to know the name of the wool producing states in India?

[A]. Punjab
[B]. Rajasthan
[C]. Gujarat
[D]. All the above
Q25

Which of the following statement is or are incorrect?

[A]. Silkworms are caterpillar of silk moth.
[B]. In India, sheep, camels and goats, yaks are generally reared for obtaining wool.
[C]. The wool yielding animals have a thick coat of hair which trap a lot of air.
[D]. The fine soft hair fibres are used for making wool.



Important Questions of 7th Science Chapter 3

What is the name of silkworms?

Silk is also natural animal fibre, obtained from the silkworms named Bombyx Mori.

What is Sericulture?

The practice of rearing silkworms to produce silk is called Sericulture.

What are the common helth problems from which workers suffering in Sericulture industry?

Respiratory disorders, Asthma, scabies, blisters and skin infections are some of the common health problems that workers working in sericulture industry suffer from.

What do you know about Reeling?

The process of collecting of silk thread from cocoons is Reeling.

Uses of Silk
    • In the manufacture of clothing, dress materials, curtains and upholstery.
    • For handicrafts and items like parachutes, bicycle tyres, comforter filling and artillery gunpowder bags.
    • Through a special manufacturing process, it is made suitable for use as nonabsorbable surgical sutures.
    • Doctors also use it to make prosthetic arteries.
    • As a material to write on.

Download NCERT Books and Offline Apps 2021-22 based on new CBSE Syllabus. Ask your doubts related to NIOS or CBSE Board and share your knowledge with your friends and other users through Discussion Forum.