Raw materials for most of the fabrics are obtained from
Earth
Sky
Petroleum
None of these
Which of the following are correct about plastics ?I. They are toxic to aquatic life when placed in water.II. They are non-biodegradable.III. They cause air-pollution as on burning they produce toxic gases.IV. They can be easily decomposed by micro-organisms.
I and II only
II and III only
I, II and III only
I, II and IV only
The sorter's disease is caused by a bacteria:
Anthrax
Bacillus
Virus
Aedes
Which of the following properties are possessed by synthetic fibres ?I. They have low tensile strength.II. They show the property of elasticity.III.They do not wrinkle.
I and III only
All of the above.
Select the material that is used to make ropes for use in rock climbing.
Nylon-6
Nylon-66
Rayon
Acrylic
Which of the following is true?
Fabrics made of polyesters and nylons are heat set
Plastics are synthetic materials that can't be moulded into permanent shape
Natural fibres are hydrophobic
Synthetic fibres do not accumulate electric charge on them
Commonly used synthetic fabrics areI. RayonII. NylonIII. PolyesterIV. Acrylic
All of these
Which of the following are used to obtain fabrics ?
1.Weaving ii.Knitting iii.Setting iv.Serving
Wool is obtained from _______ of sheep.
Skin
Toes
Fleece
All of the above
Which of the following is true for plastics ?
Like synthetic fibres, plastics are also polymers.
Thermo-plastics are harder and stronger than thermosetting plastics.
Bakelite is a thermoplastic.
None of the above
