chemical engineering polymer technology MCQs – Page 10

Practise multiple-choice questions from chemical engineering polymer technology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering polymer technology Mcqs
181. Styrene butadiene rubber is commercially manufactured by__________________?
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A. Suspension polymerisation

B. Bulk polymerisation

C. Solution polymerisation

D. Emulsion polymerisation
182. Thermosetting materials_________________?
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A. Are solvent soluble

B. Are cross-linked molecules

C. Soften on application of heat

D. None of these

183. Vinyl flooring is done using _____________ sheets?
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A. Polyvinyl acetate

B. Polythene

C. Polypropylene

D. PVC
184. _____________ polythene is most prone to stress-cracking ?
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A. Linear low density

B. Low density

C. Cross-linked

D. High density
185. Rain coats are made of__________________?
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A. PVC

B. Neoprene

C. SBR

D. Polyurethane

186. Which of the following is stretched into fibers ?
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A. Unsaturated polyester

B. Isoprene

C. Bakelite

D. Saturated polyester
187. Nylon-66 compared to nylon-6 has __________________?
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A. rasion resistant properties

B. All A., B. and C.

C. Lower melting point

D. Higher hardness

188. Vulcanisation of rubber does not increase its__________________?
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A. Softness

B. Elasticity & water solubility

C. Oxidation resistance

D. Weight & strength

189. Rexine (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten_______________?
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A. Bakelite

B. Teflon

C. PVC

D. SBR

190. Thermosetting plastic materials___________________?
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A. Cannot be melted after forming

B. Is useful for melt casting

C. Can be repeatedly melted

D. Is useful for spinning

191. _____________ moulding is used for shaping of thermosetting plastics exclusively?
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A. Compression

B. Injection

C. Transfer

D. Extrusion

192. Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation ?
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A. PTFE

B. PVC

C. Bakelite

D. Epoxy resin

193. Polypropylene is preferred to polythene, because the former is ____________________?
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A. Non-inflammable

B. Harder

C. Stronger

D. Both B. & C.
194. Zeigler Natta catalyst (AlR3 AlCl3) is used in the polymerisation of_________________?
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A. Propylene

B. Vinyl acetate

C. Styrene

D. Vinyl chloride

195. Trade name of ______________ is neoprene?
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A. Poly vinyl acetate

B. Polychlorophrene

C. Polyisoprene

D. Polytetrafluoroethylene

196. _______________ is normally used for the manufacture of refrigerator components and transistor parts?
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A. Polyurethane

B. Polypropylene

C. Polyester

D. Polystyrene
197. In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is________________?
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A. Terylene

B. PVC

C. Polypropylene

D. Polybutadiene

198. Thermocol (expanded polystyrene) is not used for __________________?
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A. High temperature thermal insulation in furnaces

B. Acoustic control and ceiling for building

C. Packing of delicate electronic gadgets

D. Low temperature thermal insulation as in refrigerator and air conditioners

199. Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ C?
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A. 500

B. 250

C. -20

D. 50
200. Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is_______________________?
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A. Aluminium triethyl combined with titanium tetrachloride

B. Ni

C. V2O5

D. Fe