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 2020-21.

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 2020-21

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

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

[A]. Air Skin
[B]. Wide Plus Fabrics
[C]. Wool Dura
[D]. Wool Mark
Q2

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




Q3

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.
Q4

Silk fibre is obtained from

[A]. Fleece of sheep
[B]. Cotton ball
[C]. Cocoon
[D]. Shiny jute stalk




Q5

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.
Q6

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.




Q7

The rearing of silkworms for obtaining silk is called

[A]. Cocoon
[B]. Silk
[C]. Sericulture
[D]. Silviculture
Q8

Paheli wants to know, what the maximum length of continuous silk thread that can be obtained from a cocoon?

[A]. About 1 metre
[B]. About 9 metre
[C]. About 100 metre
[D]. About 900 metre



Q9

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
Q10

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.



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.



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