chemical engineering polymer technology MCQs – Page 7

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 Review each marked answer and report any item that may be outdated or unclear.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

121. Commercial production of polypropylene employs _____________ polymerisation?
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A. Suspension

B. Solution

C. Bulk

D. Emulsion

122. Plastic tubes & pipes are generally made by ______________ moulding?
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A. Injection

B. Transfer

C. Extrusion

D. Compression

123. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA) ?
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A. Lucite

B. Plexiglass

C. Perspex

D. Teflon

124. The physical state in which polymers exist is___________________?
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A. Melts & rubber like state

B. Partially crystalline state

C. All A., B. and C.

D. Amorphous glassy state

125. Terylene is a/an_________________?
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A. Addition polymer

B. None of these

C. Homopolymer

D. Poly amide

126. Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their________________?
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A. Molecular sizes

B. wer: Option B

C. Magnitude of intermolecular forces

D. Resistance to heat

E. Polymerisation mechanism

127. _______________ is a copolymer ?
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A. Nylon-66

B. Poly tetra fluoro ethylene

C. PVC

D. Polypropylene

128. Pick out the wrong statement?
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A. Vulcanised rubber is more elastic than natural rubber

B. The intermolecular forces in thermoplastic polymers are intermediate to that of elastomers &

C. Polymers made of more than one monomer is called copolymer or mixed polymer

D. Polymers made of only one monomer is called homopolymer

E. res

129. Branched chair polymers as compared to linear polymers have _________________?
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A. Higher tensile strength

B. None of these

C. Lower density

D. Higher melting point

130. Size range of polymer molecules varies from __________ meter?
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A. 10-2 to 10-5

B. 10-4 to 10-7

C. 10-1 to 10-2

D. 10-8 to 10-10

131. Which of the following is generally not drawn into fiber ?
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A. Polyamide

B. Unsaturated polyesters

C. Saturated polyesters

D. Polyacrylonitrile

132. ______________ is an addition polymer ?
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A. Polythene

B. Bakelite

C. None of these

D. Nylon

133. Buna-N is also called__________________?
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A. Neoprene

B. Nitrile rubber

C. Thiokol

D. Butyl rubber

134. Poly-methyl-methacrylate, which is an acrylic resin, is also called ___________________?
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A. Teflon

B. Plexiglass or Lucite

C. Dacron

D. Thiokol

135. Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten__________________?
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A. Polyurethane

B. Polystyrene

C. Either B. or C.

D. Saturated polyester

136. Polycaprolactam (Nylon 6) is produced by the condensation polymerisation of caprolactam at 240-280C in which the conversion of caprolactam is about ______________ percent?
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A. 99

B. 75

C. 90

D. 50

137. In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of__________________?
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A. Cross linked polystyrene

B. Phenol formaldehyde resins

C. Polyamides

D. Polyesters

138. Polycaprolactam is also known as _________________?
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A. Nylon-66

B. Nylon-6

C. SBR

D. Teflon

139. Collapsible tubes for tooth paste are produced by _____________ extrusion?
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A. Indirect

B. Impact

C. None of these

D. Direct

140. The only natural thermoplastic resin, which is a product of animal life is ____________________?
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A. Copal

B. Shellac

C. Rosin

D. Amber

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