40 TOP POLYMER TECHNOLOGY Online Test – Multiple Choice Questions and Answers 1. Pick out the correct statement The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of polymerisation Polymers can be vaporised by heating to a very high temperature Plastics are good conductors of heat and electricity All the polymers are highly crystalline in nature 2. Plastic tubes & pipes are generally made by __________ moulding injection extrusion transfer compression 3. Nylon 6 as compared to nylon 6, 6 has lower adhesion to rubber abrasion resistance thermal stability hardness 4. Pick out the wrong statement Sharp melting point is not observed in thermoplastic polymers Property of tackiness is exhibited by uncured rubber Polymeric fibres are never produced by addition polymerisation Polythene generally has an excellent resistance to ultra violet rays 5. Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ? Carbon black Rosin Phosphorous Pine oil 6. Ion exchange resins are made of polystyrene lucite teflon sulphonated bakelite 7. __________ is a natural fibre Dacron Cellulose Nylon-6 none of these 8. Which of the following polymers has the tendency of decomposing before melting ? Polystyrene PVC Nylon None of these 9. Most of the plastics are safe to be used upto a maximum temperature of __________ °C 100 150 300 350 10. Which of the following polymers belong to the class of formaldehyde resin ? Teflon Dacron Melamine resins None of these Loading … Question 1 of 10
