Synthetic Fibres and Plastics Test

Result

Synthetic Fibres and Plastics Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

Why PET is increasingly used for making bottles, jars and utensils?

A
It is light weight and very strong

B
It is shatter proof

C
Impact resistant

D
All of the above

Solution

PET is light weight, naturally colourless with high transparency, strong and impact resistant. It is shatter proof. All these properties of PET makes a highly more suitable material than glass for making bottles, jars, utensils etc.
Question 2
1 / -0

Plastics are ________ water and therefore are used in making buckets.

A
lighter than

B
soluble in

C
insoluble in

D
None of these

Solution

General properties of plastics are strength, weather resistance, durability etc. because plastics are high molecular weight organic compounds. And these organic compounds are hydrophobic in nature due to presence of hydrocarbons and thus make plastics water insoluble & therefore are used in making buckets.
Hence correct option is $$C$$.
Question 3
1 / -0

A person has to make electric switches and plugs. Which material is recommended ?

A
Teflon

B
Bakelite

C
Rayon

D
PVC

Solution

Bakelite has high heat resistant property which makes it a poor conductor of heat and electricity.it is used for making electrical switches because it high heat resistance property protects us from electric shocks.
also it is used to make handles of cooking utensils because of this property it does not conduct heat and so the handles are prevented from becoming too hot and this makes it easy to handle the handles of cooking utensils.

Hence, the correct option is $$\text{B}$$
Question 4
1 / -0

Frying pan handles are made up of:

A
thermoplastic

B
thermosetting Plastic

C
rayon

D
PVC

Solution

Thermoplastics are not suitable for making handles of frying pans because they are flexible and soften on heating. On the other hand thermosetting plastics are used because they do not become soft on heating and are very hard and rigid.
Hence, the correct option is B
Question 5
1 / -0

Substances which cannot be decomposed by micro organisms are called :

A
Biodegradable substances

B
Non biodegradable substances

C
Convertable subtances

D
Non -convertable

Solution

Question 6

1 / -0

Match the column A and B

Column A	Column B
(i) Thermoplastics	(a) Handles of utensils, floor tiles
(ii) Thermosetting plastics	(b) Melamine
(iii) Biodegradable	(c) Teflon
(iv) Fire proof plastic	(d) Wood
(v) Oil and water do not stick	(e) Combs, containers

i-d, ii-e, iii-a, iv-b, v-c

i-e, ii-a, iii-d, iv-b, v-c

i-a, ii-d, iii-b, iv-c, v-e

i-c, ii-b, iii-a, iv-e, v-d

Solution

Thermoplastic materials are those materials that are made of polymers linked by intermolecular interactions or van der Waals forces, forming linear or branched structures.

Melamine is a versatile material. It resists fire and can tolerate heat better than other plastics. It is used for making fire-resistive uniforms, floor tiles, kitchenware and fabrics which resist fire.

Thermosetting plastics are generally strong and resistant to heat, but they melt the first time they are heated to a high enough temperature and harden (set) permanently when cooled. They can never be melted or reshaped again.

They are used in situations where resistance to heat is important, e.g. on kitchen work surfaces, good-quality plastic cups, saucepan handles and plug casings. Wood is biodegradable

Question 7
1 / -0

Containers that are lightweight, affordable, durable, and easy to handle are generally made up of :

A
plastic

B
metal

C
wood

D
brick

Solution

Plastic is lightweight, affordable, durable, and easy to handle. So, plastic is a good choice to make containers out of the other three options.
Question 8
1 / -0

Rayon is mixed with __________ to make ___________ and mixed with __________ to make ____________.

A
cotton, bed sheet, wool, carpets

B
teflon, bed sheet, jute, carpets

C
nylon, bed sheet, cotton, carpets

D
wool, bed sheet, cotton, carpets

Solution

Rayon or artificial silk is obtained from a natural source, wood pulp. It is cheaper than silk and can be woven like silk fibres. Rayon is mixed with cotton to make bed sheets or mixed with wool to make carpets.
Hence, option $$A$$ is correct.
Question 9
1 / -0

A common form of polyester is :

A
Nylon

B
Rayon

C
PET

D
Acrylic

Solution

As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, such as in the cutin of plant cuticles, as well as synthetics such as polybutyrate.
Question 10
1 / -0

Ropes made of nylon and polyester are commonly used in cranes and elevators because :

A
Nylon is inflammable

B
It is a good conductor of heat and electricity

C
It is very strong, fairly elastic and light weight

D
It is heat resistant

Solution

Ropes made of nylon and polyester are commonly used in cranes and elevators because It is very strong, fairly elastic and light weight.

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Re-Attempt Weekly Quiz Competition

Synthetic Fibres and Plastics Test - 19

Result

Synthetic Fibres and Plastics Test - 19

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SHARING IS CARING

Question 1

It is light weight and very strong

It is shatter proof

Impact resistant

All of the above

Solution

Question 2

lighter than

soluble in

insoluble in

None of these

Solution

Question 3

Teflon

Bakelite

Rayon

PVC

Solution

Question 4

thermoplastic

thermosetting Plastic

rayon

PVC

Solution

Question 5

Biodegradable substances

Non biodegradable substances

Convertable subtances

Non -convertable

Solution

Question 6

i-d, ii-e, iii-a, iv-b, v-c

i-e, ii-a, iii-d, iv-b, v-c

i-a, ii-d, iii-b, iv-c, v-e

i-c, ii-b, iii-a, iv-e, v-d

Solution

Question 7

plastic

metal

wood

brick

Solution

Question 8

cotton, bed sheet, wool, carpets

teflon, bed sheet, jute, carpets

nylon, bed sheet, cotton, carpets

wool, bed sheet, cotton, carpets

Solution

Question 9

Nylon

Rayon

PET

Acrylic

Solution

Question 10

Nylon is inflammable

It is a good conductor of heat and electricity

It is very strong, fairly elastic and light weight

It is heat resistant

Solution

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