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Test: Synthetic Fibres & Plastics- 1


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20 Questions MCQ Test Science & Technology for UPSC CSE | Test: Synthetic Fibres & Plastics- 1

Test: Synthetic Fibres & Plastics- 1 for UPSC 2022 is part of Science & Technology for UPSC CSE preparation. The Test: Synthetic Fibres & Plastics- 1 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Synthetic Fibres & Plastics- 1 MCQs are made for UPSC 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Synthetic Fibres & Plastics- 1 below.
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Test: Synthetic Fibres & Plastics- 1 - Question 1

Which of the following fibres are made from petroleum products?

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 1

Synthetic fibers are made from petroleum polymers and are often less expensive than their natural plant and animal counterparts. These synthetics first appeared on the scene with artificial silk in 1894, and other fibers were developed throughout the 20th century, such as Rayon, Nylon, Acrylic and Polyester.

So, dacron, acrylon and acrylic are petroleum products.

Test: Synthetic Fibres & Plastics- 1 - Question 2

What is the saturated solid state?

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 2

The process of change of solid substance into its liquid state is called melting or fusion. The constant temperature at which the solid becomes liquid upon absorption of heat at constant pressure is called the melting point of that solid at that pressure.

Test: Synthetic Fibres & Plastics- 1 - Question 3

Which one is artificial silk?

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 3

Rayon is called as artificial silk. It is obtained from wood pulp containing cellulose. Chemical treatment of wood pulp forms rayon fibre which can be dyed in a variety of colours.

Test: Synthetic Fibres & Plastics- 1 - Question 4

When plastics are burnt they release:

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 4

When plastic is burnt, they release toxic gases that includes, carbon dioxide, carbon monoxide, sulphur dioxide etc. They cause air pollution.

Test: Synthetic Fibres & Plastics- 1 - Question 5

Which of the following is incorrect regarding plastics:

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 5

Plastics are non biodegradable, resistant to weather and durable. Plastic can be recycled too. It is used to make chairs, rope, bucket and a number of other utensils.

Test: Synthetic Fibres & Plastics- 1 - Question 6

_____ is blended with wool for making carpets.

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 6 Rayon is a regenerated fibre; i.e. the cellulose is broken down and then again reformed.
Test: Synthetic Fibres & Plastics- 1 - Question 7

_____ is blended with wool to give terrywool.

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 7

Polyester is blended with wool to give terry wool. Terry wool is used to make winter dresses and other kinds of fabrics. It is durable and easy to wash.

Test: Synthetic Fibres & Plastics- 1 - Question 8

Why synthetic fibres are not fit for laboratory work?

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 8

Synthetic clothes catch fire very easily.Fabric can melt and stick to the body of the person wearing it.

Test: Synthetic Fibres & Plastics- 1 - Question 9

The fibres obtained from animals are made up of:

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 9

Protein, animal fibres are natural fibres that consist largely of particular proteins. Instances are silk, hair/ fur and feathers. The animal fibres used most commonly both in the manufacturing world  as well as by the hand spinners are wool from domestic sheep and silk.

Test: Synthetic Fibres & Plastics- 1 - Question 10

Raw materials for the synthetic fibres are derived from :

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 10

Raw materials for the synthetic fibres are derived from petroleum products using a number of processes. Therefore, these fibres are called as synthetic fibres.

Test: Synthetic Fibres & Plastics- 1 - Question 11

What is PET?

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 11

PET is  polyethylene terephthalate, a plastic resin and a form of polyester. Polyethylene terephthalate is a polymer that is formed by combining two monomers: modified ethylene glycol and purified terephthalic acid. The first PET bottle was recycled in 1977.

Test: Synthetic Fibres & Plastics- 1 - Question 12

Name NYLON was derived from:

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 12

“nylon” came from “New York” and “London”, because two chemists thought up the word on an intercontinental flight from one of the cities to the other.

Test: Synthetic Fibres & Plastics- 1 - Question 13

Remoulding can be done of :

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 13

Polyvinyl chloride (PVC) is a thermoplastic which can be remoulded by heating. It is used for making pipes and other materials which is flexible and durable.

Test: Synthetic Fibres & Plastics- 1 - Question 14

Unbreakable kitchenware is made from :

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 14

Unbreakable kitchenware is made from melamine. Melamine is a thermosetting plastic is resistant to fire and can tolerate heat better than other plastics.

Test: Synthetic Fibres & Plastics- 1 - Question 15

Which of the following is a thermosetting plastic ?

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 15

Melamine is a thermosetting plastic as it cannot be moulded by heating. Polyester, Nylon and PTFE are thermoplastic that can be change in shape by heating.

Test: Synthetic Fibres & Plastics- 1 - Question 16

Yarn is twisted to form :

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 16

Yarn is twisted to form thread. Thread is a type of yarn intended for sewing by hand or machine. Yarn is a long continuous length of interlocked fibre.

Test: Synthetic Fibres & Plastics- 1 - Question 17

A man- made fibre obtained from natural source is :

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 17

Rayon is a man-made fibre obtained from natural source. Rayon is obtained by chemical processing of pulp of wood containing cellulose.

Test: Synthetic Fibres & Plastics- 1 - Question 18

The first fully synthetic fibre is :

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 18

The first fully synthetic fibre was nylon. It was prepared from coal, water and air. It is very strong, elastic and light, it is very easy to wash and used for making variety of things like socks, ropes, bags, curtains etc

Test: Synthetic Fibres & Plastics- 1 - Question 19

Woollen apparels can be made from :

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 19

Wool and acrylic is used to make woollen apparels for winter season. Wool is a natural fibre obtained from goat, sheep or yak but acrylic is made fibre which is more durable and less expensive.

Test: Synthetic Fibres & Plastics- 1 - Question 20

Such plastic which gets deformed easily on heating is called:

Detailed Solution for Test: Synthetic Fibres & Plastics- 1 - Question 20

When we add hot water to a plastic bottle, it gets deformed. Such plastic which gets deformed easily on heating and can be bent easily are known as thermoplastics.

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