WorksheetsFIBRES CLASS 8
Total questions: 45
Worksheet time: 15mins
What is the other name for artificial silk?
(a) Nylon
(b) Rayon
(c) Acrylic
(d) Polyester
A
B
C
D
Which fibre is used as artificial wool?
(a) Acrylic
(b) Rayon
(c) Nylon
(d) Cotton
A
B
C
D
Polymers are made up of small units called
(a) layers
(b) molecules
(c) cells
(d) monomers
A
B
C
D
The strongest synthetic fibre is
(a) nylon
(b) rayon
(c) polyester
(d) acrylic
A
B
C
D
Wood pulp is used to make
(a) plastic
(b) wool
(c) jute
(d) rayon
A
B
C
D
Which of the following is a natural fibre?
(a) Wool
(b) Nylon
(c) PVC
(d) Polythene
A
B
C
D
Melamine is
(a) thermoplastic polymer
(b) thermosetting polymer
(c) fibre
(d) elastomer
A
B
C
D
Fibre produced in factories is called
(a) man-made fibre
(b) natural fibre
(c) synthetic fibre
(d) both (a) and (c)
A
B
C
D
PET is a
(a) polyester
(b) polyamide
(c) nylon
(d) thermosetting polymer
A
B
C
D
Which of the following cannot be recycled?
(a) Toys
(b) Cooker handles
(c) Carry bags
(d) Plastic chair
A
B
C
D
Which of the following polymers is not made by humans in an industrial process?
Melamine
Bakelite
Nylon
Acrylic
Silk
Which of the following statements is/are false?
Cellulose is a polymer that is made up of a large number of small glucose molecules joined one after the other.
Wood contains a very less amount of cellulose polymer.
The small molecules that join together to form a polymer are called monomers
Which of the following man-made fibers is made from a natural material called cellulose?
Polyester
Rayon
Nylon
Acrylic
Which of the following is not a property of nylon?
Nylon is a thermoplastic polymer.
Nylon fibers are fairly strong and elastic
Nylon fibers are lightweight and lustrous.
It is cheaper than natural silk and can be woven like silk fiber.
Which of the following fiber threads is actually stronger than a steel wire of similar thickness?
Wool
Silk
Nylon
Cotton
Which of the following is not a characteristic of synthetic fibers?
Synthetic fibers are very durable.
Synthetic fibers absorb very little water.
Synthetic fibers are wrinkle resistant.
Synthetic fibers are extremely thick and strong.
Polyester is a synthetic fiber in which the polymer units are linked by ester groups. Which of the following is not a property of polyester?
Polyester fibers are weaker in strength than nylon fibers.
Polyester fiber is not attacked by moths and ordinary chemicals.
Polyester is a thermoplastic polymer.
Polyester fibers are softer than nylon fibers.
Which of the following is a fire-resistant plastic and is used to coat the uniforms of firemen?
Teflon
Melamine
Bakelite
PVC
Which of the following plastics is used for making electric switches, plugs and sockets?
Polythene
Polyvinyl chloride Melamine
Melamine
Bakelite
The coating on modern non- stick cookware and electric iron is of
Terrycot
Rayon
Teflon
Nylon
Polycot is made by mixing two types of fibres namely
Silk+cotton
Wool+cotton
Polyester+Cotton
Polyethylene+Cotton
In which of the following plastics are the long polymer chains cross-linked with one another?
Acrylic
Bakelite
Polyester
Nylon
Which of the following arrangements is the correct order of fabrics in their decreasing strength?
Polyester - Nylon - Silk - Cotton - Wool
Nylon - Polyester - Silk - Cotton - Wool
Wool - Nylon - Silk - Cotton - Polyester
Polyester - Nylon - Cotton - Silk - Wool
The 4R principle is
Reduce, Reuse, Recycle, Recover
Remember, Reduce, Recycle, Rejoice
Repeat, Recycle, Rejoice, Reduce
None of these
The plastics which do not remould again on heating are called:
Thermosetting plastics
Thermoplastics
Both of these
None of these
Fabrics are made from fibres obtained from (fabrics un fibres se bnti Hein Jo milte hei-)
Only natural source
Only artificial source
Natural or artificial source
Only man- made source
Can not say
Which of the following is Synthetic fibre? (Inme se konsa Synthetic fibre hei?)
Wool
Cotton
Rayon
Silk
No one
Which of the following in natural Fibre? (Inme se konsa natural fibre hei?)
Rayon
Nylon
Silk
Polyester
Acrylic
Many small units combine to form a large single unit called a _________. (Bhot si small units combine hokr ek large unit bnate hei jise _____ khte Hein.
Natural
Rayon
Acrylic
Polyester
Polymer
In Polymer , The word poly & Mer means ? (Polymer mein word poly or mer khlate Hein?)
Some & full
Polythene & many
Many & unit
Unit & some
Any & Unit
Silk fibre is obtained from? (Silk fibre kisse milta hei?)
Silk plant
Silk flower
Cokoon
Silkworm
Siklworm
Cellulose is made up of a large number of _______ units. (Cellulose, _______ ki large number units se bnta hei.)
Cotton
Gulucose
Sucrose
Cellulars
Glucose
Silk fibre obtained from silkworm was discovered in _______. (Silkworm see obtain hone wale silk fibre ko kha discover Kia gya.)
Africa
India
Asia
China
Japan
Rayon was obtained by chemical treatment of ______? (Rayon ______ ke chemical treatment se milta hei )
Wooo worm
Silk worn
Wood pulp
Wood plup
Flex
Which of these is not a fibre?
cotton
wool
nylon
leather
What are natural fibres produced from?
plants only
animals and plants
animals only
crude oil
Wool & silk are-
Aminal fibre
Plant fibre
Synthetic fibre
Animal fibre
Synthetic nylon
The process of taking out silk fibre from cocoon is called ----
stiffling
reeling
colouring
weaving
The rearing of silkworms for obtaining silk is called---------
Agriculture
Sericulture
Aquaculture
poultry
Which of the is the largest producer of silk
India
China
America
Africa
Which part of sheep's body yield fibres?
Leg
Eye
Mouth
Hair
Liver
Pashmina shawls are made up of -----
pashmina wool
angora wool
yak wool
rabbit fur
The washing of the fleece to remove dust and dirt is called
Carding
Scouring
grading
shearing
Wool comes from animals like-----
Goat and sheep
llama and alpaca
rabbit and bear
all the above
The process of making fabric by interlocking of warp and weft threads is called----
weaving
knitting
reeling
carding
