Which of the following is a natural polyamide fiber?
A. Wool
B. Silk
C. Cotton
D. None of these
Polymer Technology
Synthetic rubber___________________?
Synthetic rubber___________________?
A. Deforms, if stretched to double of its original dimension
B. Is brittle at low temperature
C. Is softer at higher temperature
D. Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases
_______________ is a natural fiber?
_______________ is a natural fiber?
A. Cellulose
B. Dacron
C. Nylon-6
D. None of these
Vulcanisation of rubber does not increase its__________________?
Vulcanisation of rubber does not increase its__________________?
A. Softness
B. Oxidation resistance
C. Weight & strength
D. Elasticity & water solubility
Phenol formaldehyde is produced by condensation polymerisation. It is also known as_________________?
Phenol formaldehyde is produced by condensation polymerisation. It is also known as_________________?
A. Teflon
B. Bakelite
C. Polyester
D. Nylon-66
Vulcanisation of rubber does not increase its_________________?
Vulcanisation of rubber does not increase its_________________?
A. Elasticity
B. Plasticity
C. Ductility
D. None of these
_____________ is a thermosetting plastic ?
_____________ is a thermosetting plastic ?
A. PVC
B. Polythene
C. Bakelite
D. Polystyrene
Which of the following is a polymer of Hexamethylene diamine and adipic acid ?
Which of the following is a polymer of Hexamethylene diamine and adipic acid ?
A. Nylon-6
B. Nylon-66
C. Nylon-6, 10
D. Epoxy resin
Which of the following polymers shows the highest anti-tacking properties ?
Which of the following polymers shows the highest anti-tacking properties ?
A. Melamine formaldehyde resin
B. Phenolic resin
C. Epoxy resin
D. Alkyd resin
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?
A. Ethylene glycol
B. Stearic acid estors
C. Tricresyl phosphate
D. Esters of phthalic acid