chemical engineering polymer technology Mcqs
151. Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces________________?
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A. PVC

B. Nylon-6

C. Polyester

D. Dacron
152. ? glucose is the monomer of__________________?
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A. Starch

B. None of these

C. Protein

D. Cellulose
153. Which of the following is a natural polyamide fiber?
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A. Cotton

B. Silk

C. None of these

D. Wool
154. Dacron (or Treylene) fibres as compared to nylon fibres have_____________________?
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A. All A., B. and C.

B. Better heat & acid resistant properties

C. Poorer resistance to alkalis

D. Poorer dyeability

155. Plastic articles are normally produced by _____________ moulding?
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A. Green sand

B. Shell

C. Injection

D. Dry sand

156. Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of________________?
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A. Bunai N

B. Buna S

C. Cold SBR

D. Butyl rubber
157. Polycaprolactam is____________________?
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A. Rayon

B. Nylon-6

C. Dacron

D. Nylon-66

158. Gutta percha rubber is_________________?
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A. Soft & tacky at room temperature

B. A thermosetting resin

C. Recovered by coagulation of rubber latex

D. An isomer of natural rubber
159. Alkyd resin cannot be used for making_________________?
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A. Film forming materials

B. Paint & varnish

C. Fibers

D. Plasticiser

160. Pick out the wrong statement ?
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A. Polythene is a copolymer, while SBR is a homopolymer

B. Protein is a natural polymer

C. Neoprene is a natural rubber

D. Polystyrene is a thermoplastic polymer

161. Styrene butadiene rubber (SBR) is never used for making__________________?
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A. Soles of shoes

B. Front wheel tyres of aeroplanes (i.e., heavy duty tyres)

C. Gaskets

D. Coated fabrics

162. A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of_______________________?
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A. Urea-formaldehyde resins

B. Polyamides

C. Siloxane elastomers

D. Vinyl polymers

163. Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?
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A. 1000 kgf/cm2 and 100C

B. 7 kgf/cm2 and 70 C

C. 7 kgf/cm2 and 700C

D. 1 kgf/cm2 (gage) and 70C

164. ______________ fibres are made of polyamides?
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A. Rayon

B. Orion

C. Dacron

D. Nylon
165. Poly-tetra-fluoro ethylene (PTFE) is known as_________________?
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A. Celluloid

B. Bakelite

C. Dacron

D. Teflon
166. Which of the following low molecular weight (<104), soft & waxy polymer is used in chewing gum? ?
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A. Cellulose acetate

B. Polyvinyl acetate

C. Thiokol

D. PVC

167. Poly Vinyl chloride (PVC) is a ________________ material?
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A. Fibrous

B. Chemically active

C. Thermosetting

D. Thermoplastic
168. Pick out the wrong statement ?
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A. Teflon is formed by step growth polymerisation

B. Addition polymers are generally formed by chain growth polymerisation

C. Condensation polymers are generally formed by step growth polymerisation

D. Bakelite is formed by step growth polymerisation

169. Rayon is a ____________ fibre?
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A. Polyamide

B. Cellulosic

C. Natural

D. Polyester

170. Tubeless tyres are made of ______________ rubber, which is a co-polymer of isoprene & isobutylene?
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A. Nitrile

B. Silicone

C. Neoprene

D. Butyl
171. Main constituent of natural rubber is_________________?
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A. Poly chloroprene

B. Polybutadiene

C. Polyisoprene

D. Polystyrene

172. Epoxy resin is____________________?
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A. Not used for surface coating

B. A good abrasive

C. A polyester

D. An elastomer

173. Molecular weight of polymers are in the range of__________________?
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A. 107-109

B. 10 to 103

C. 109-1011

D. 102-107
174. _______________ is a natural fiber?
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A. Nylon-6

B. None of these

C. Cellulose

D. Dacron

175. Cellulose content in bamboo fibre is about ______________ percent?
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A. 85

B. 20

C. 10

D. 50
176. Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?
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A. Teflon

B. Water impermeable cellophane

C. Cellulose acetate

D. Polythene
177. Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but____________________?
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A. Polyamide

B. Saturated polyester

C. Alkyd resin

D. Polyacrylonitrile
178. _____________ scrap can be recycled & reutilised?
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A. None of these

B. Bakelite

C. Polythene

D. Epoxy resin

179. Plasticisers are added to synthetic plastics to ________________?
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A. Develop new improved properties not present in the original resin

B. Impart flexibility

C. Improve workability during fabrication

D. All A., B. and C.
180. _______________________ is not a condensation polymer ?
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A. Teflon

B. Polystyrene

C. Nylon-66

D. Dacron

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