Class 7 Fibre To Fabric CBSE Questions & Answers

Class 7 · Fibre To Fabric

This is Science Class 7 Fibre to Fabric CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The machine that comb loose wool in sheet is called
  • A
    Carding machine
    Correct
  • B
    Looming machine
  • C
    Ginning machine
  • D
    Moulding machine
2
Wool and Silk are
  • A
    Organic fibres
  • B
    Natural fibres
    Correct
  • C
    Synthetic fibres
  • D
    Mixed fibres
3
Best quality of wool is obtained from
  • A
    Paschimini sheep
  • B
    Merino sheep
    Correct
  • C
    Goat
  • D
    Kashmiri sheep
4
Silk is a natural __________ fibre.
  • A
    Protein
    Correct
  • B
    Mixed
  • C
    Fatty acids
  • D
    Cellulose
5
Thick coat of hair on sheep’s body is called
  • A
    Bald
  • B
    Flagella
  • C
    Fleece
    Correct
  • D
    Marie
6
Which of the following species is most common silk moth?
  • A
    Mooga silk
    Correct
  • B
    Tussar silk
  • C
    Mulberry silk
  • D
    Kosa silk
7
Which of the following animal is not used to obtain wool?
  • A
    Sheep
  • B
    Dog
    Correct
  • C
    Goat
  • D
    Camel
8
When silk was first produced in china?
  • A
    3000 B.C
    Correct
  • B
    300 B.C
  • C
    4000 B.C
  • D
    2000 B.C
9
silk moth that contain silk is called
  • A
    reel
  • B
    hub
  • C
    cocoon
    Correct
  • D
    mulberry
10
The silk and wool are made of a kind of
  • A
    Carbohydrates
  • B
    Proteins
    Correct
  • C
    Fats
  • D
    Vitamins
11
The process of rearing silk worms in order to obtain silk is called
  • A
    Piece culture
  • B
    Monoculture
  • C
    Horticulture
  • D
    Sericulture
    Correct
12
Shearing do not hurt the sheep because
  • A
    Upper most skin layer contain cuticle
  • B
    Upper most skin is very thick
  • C
    Upper most layers is spongy
  • D
    Upper most skin of sheep is dead
    Correct
13
The process of obtaining silk fibre from cocoons is called
  • A
    Yarning
  • B
    Shearing
  • C
    Reeling
    Correct
  • D
    Carding
14
Boiling of cocoon is done to
  • A
    Strengthen the silk
  • B
    Break the cocoon
  • C
    Breed the pupa
  • D
    Kill the pupa
    Correct
15
Silk yarn is as strong as
  • A
    Copper wire
  • B
    Steel
    Correct
  • C
    Cotton
  • D
    Wool