Polymer Technology

71. Dacron (or Treylene) fibres as compared to nylon fibres have

  1. Better heat & acid resistant properties
  2. Poorer resistance to alkalis
  3. Poorer dyeability
  4. All (A), (B) and (C)

Correct answer: (D)
All (A), (B) and (C)

72. Dacron is a

  1. Condensation polymerisation product of Hexamethylene diamine and adipic acid
  2. Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol
  3. Thermosetting material
  4. None of these

Correct answer: (D)
None of these

73. Dacron is a/an

  1. Polyester
  2. Unsaturated polyester
  3. Polyamide
  4. Inorganic polymer

Correct answer: (A)
Polyester

74. Density of high density polythene is about _________ gm/c.c.

  1. 1.18
  2. 1.05
  3. 0.95
  4. 0.99

Correct answer: (C)
0.95

75. Density of low density polythene is about _________ gm/c.c.

  1. 0.38
  2. 0.56
  3. 0.81
  4. 0.91

Correct answer: (D)
0.91

76. Diphenylamine is added to rubber to

  1. Vulcanise it
  2. Protect it from deterioration on exposure to air
  3. Make it non-inflammable
  4. Make it thermosetting

Correct answer: (B)
Protect it from deterioration on exposure to air

77. Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of

  1. Cold SBR
  2. Butyl rubber
  3. Bunai N
  4. Buna S

Correct answer: (B)
Butyl rubber

78. Ebonite is a/an

  1. Highly vulcanised rubber
  2. Natural rubber
  3. Unvulcanised raw rubber
  4. Adhesive

Correct answer: (A)
Highly vulcanised rubber

79. Elastomers are

  1. Thermosetting material
  2. Exemplified by protein derivatives
  3. Having high flexural strength
  4. Having very high tensile strength and heat resistance

Correct answer: (C)
Having high flexural strength

80. Epoxy resin is

  1. Not used for surface coating
  2. A good abrasive
  3. An elastomer
  4. A polyester

Correct answer: (B)
A good abrasive

Previous
Page 8 of 28
Next
Copyright © EngineeringMCQ.com