MCQOPTIONS
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MCQOPTIONS
This section includes 229 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The conversion of caprolactam in the above case is about ____________ percent? |
| A. | 25 |
| B. | 50 |
| C. | 70 |
| D. | 90 |
| Answer» E. | |
| 52. |
_____________ scrap can be recycled & reutilised? |
| A. | Bakelite |
| B. | Epoxy resin |
| C. | Polythene |
| D. | None of these |
| Answer» D. None of these | |
| 53. |
Scouring is a finishing operation during the manufacture of fibre, which aims at ______________ of fibres? |
| A. | Improving the stretchability |
| B. | Dyeing/colouring |
| C. | Detergent solution washing |
| D. | Glycol soaking |
| Answer» D. Glycol soaking | |
| 54. |
SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at_________________? |
| A. | 1: 3 |
| B. | 3 : 1 |
| C. | 1 : 2 |
| D. | 2 : 1 |
| Answer» B. 3 : 1 | |
| 55. |
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_______________? |
| A. | Teflon |
| B. | Bakelite |
| C. | SBR |
| D. | PVC |
| Answer» E. | |
| 56. |
______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine? |
| A. | Epoxy |
| B. | Amino |
| C. | Alkyd |
| D. | Phenolic |
| Answer» C. Alkyd | |
| 57. |
Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces________________? |
| A. | Nylon-6 |
| B. | Dacron |
| C. | Polyester |
| D. | PVC |
| Answer» C. Polyester | |
| 58. |
Rayon is a ____________ fibre? |
| A. | Cellulosic |
| B. | Polyamide |
| C. | Polyester |
| D. | Natural |
| Answer» B. Polyamide | |
| 59. |
Rayon is superior to cotton in making gauge for wound treatment, because rayon_____________________? |
| A. | Is a synthetic polymer |
| B. | Does not stick to the wound unlike cotton |
| C. | Can absorb over 90% of its own weight of water |
| D. | Both B. and C. |
| Answer» C. Can absorb over 90% of its own weight of water | |
| 60. |
Rain coats are made of__________________? |
| A. | Neoprene |
| B. | PVC |
| C. | Polyurethane |
| D. | SBR |
| Answer» C. Polyurethane | |
| 61. |
Properties of a polymer is affected by the____________________? |
| A. | Chain length |
| B. | Intermolecular forces |
| C. | Both A. and B. |
| D. | None of these |
| Answer» D. None of these | |
| 62. |
_______________ practically possess no elasticity? |
| A. | Vulcanite or ebonite |
| B. | Spandex fibre |
| C. | Polysulphide rubber |
| D. | Epoxy resin |
| Answer» B. Spandex fibre | |
| 63. |
Polyvinyl chloride (PVC) ____________________? |
| A. | Is produced by Polycondensation reaction |
| B. | Uses either emulsion or suspension polymerisation methods |
| C. | Can be made thermosetting by adding a plasticiser |
| D. | Softening temperature is 200°C |
| Answer» C. Can be made thermosetting by adding a plasticiser | |
| 64. |
Polyvinyl chloride (PVC) is __________________? |
| A. | A thermosetting material |
| B. | A condensation polymerisation product |
| C. | Made by employing emulsion polymerisation |
| D. | None of these |
| Answer» D. None of these | |
| 65. |
Polyvinyl alcohol is used as a___________________? |
| A. | Cation/anion exchanger |
| B. | Water soluble adhesive |
| C. | Textile fibre |
| D. | Non-sticky coating on frying pans |
| Answer» C. Textile fibre | |
| 66. |
Polyvinyl acetate is never used for making_________________? |
| A. | Moulded articles |
| B. | Fibres |
| C. | Adhesives |
| D. | All A., B. & C. |
| Answer» B. Fibres | |
| 67. |
Polyurethane cannot be used for making____________________? |
| A. | Mattresses & foam |
| B. | Coating material |
| C. | Adhesives |
| D. | Bottles |
| Answer» E. | |
| 68. |
Polythene is a/an________________? |
| A. | Addition polymerisation product |
| B. | Condensation polymerisation product |
| C. | Thermosetting material |
| D. | None of these |
| Answer» B. Condensation polymerisation product | |
| 69. |
Polyurethane cannot be used to make____________________? |
| A. | Automobile cushion |
| B. | Thermal insulation in refrigerator |
| C. | Coating and adhesive |
| D. | Fibre reinforced plastic (FRP) |
| Answer» E. | |
| 70. |
_____________ polythene is most prone to stress-cracking ? |
| A. | High density |
| B. | Low density |
| C. | Cross-linked |
| D. | Linear low density |
| Answer» B. Low density | |
| 71. |
Polystyrene is a light, transparent, thermoplastic material used for making __________________? |
| A. | Toys and combs |
| B. | Packaging bags |
| C. | Non-sticking utensils |
| D. | Electrical insulation |
| Answer» B. Packaging bags | |
| 72. |
Polystyrene is a ____________ plastic at room temperature? |
| A. | Ductile |
| B. | Brittle |
| C. | Malleable |
| D. | None of these |
| Answer» C. Malleable | |
| 73. |
Polypropylene is preferred to polythene, because the former is ____________________? |
| A. | Non-inflammable |
| B. | Harder |
| C. | Stronger |
| D. | Both B. & C. |
| Answer» E. | |
| 74. |
Polypropylene compared to polythene is___________________? |
| A. | Harder |
| B. | Stronger |
| C. | Lighter |
| D. | All A., B. and C. |
| Answer» E. | |
| 75. |
Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a ______________ polymer? |
| A. | Thermoplastic |
| B. | Thermosetting |
| C. | Linear |
| D. | Glass like transparent |
| Answer» C. Linear | |
| 76. |
Polymers are_________________? |
| A. | Micro-molecules |
| B. | Macromolecules |
| C. | Sub-micromolecules |
| D. | None of these |
| Answer» C. Sub-micromolecules | |
| 77. |
Polymerisation process in which two or more monomers of chemically different nature take part is called__________________? |
| A. | Copolymerisation |
| B. | Addition polymerisation |
| C. | Chain polymerisation |
| D. | None of these |
| Answer» B. Addition polymerisation | |
| 78. |
Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their________________? |
| A. | Molecular sizes |
| B. | Magnitude of intermolecular forces |
| C. | Resistance to heat |
| D. | Polymerisation mechanism |
| Answer» C. Resistance to heat | |
| 79. |
Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called ________________? |
| A. | Polyurethane |
| B. | Silicone rubber |
| C. | Teflon |
| D. | Epoxy resin |
| Answer» D. Epoxy resin | |
| 80. |
Polymerisation of poly functional monomers produces polymers having_________________? |
| A. | Good mechanical strength |
| B. | Low viscosity |
| C. | Low melting point |
| D. | None of these |
| Answer» B. Low viscosity | |
| 81. |
____________ polymer is used for making unbreakable crockery? |
| A. | Thermoplastic |
| B. | Melamine |
| C. | Addition |
| D. | None of these |
| Answer» C. Addition | |
| 82. |
_____________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate? |
| A. | Fibrous |
| B. | Leathery |
| C. | Rubbery |
| D. | Hard |
| Answer» C. Rubbery | |
| 83. |
Polyhexamethylene adipamide is also known as______________? |
| A. | Bakelite |
| B. | Nylon-66 |
| C. | Epoxy resin |
| D. | Silicone rubber |
| Answer» C. Epoxy resin | |
| 84. |
Polycondensation reaction of polymerisation ___________________? |
| A. | Does not produce linear polymers |
| B. | Produces only thermoplastic material |
| C. | Produces epoxy polymers |
| D. | Does not need any catalyst |
| Answer» D. Does not need any catalyst | |
| 85. |
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces________________? |
| A. | Epoxy resin |
| B. | Polyamide |
| C. | Alkyd resin |
| D. | Phenolic resin |
| Answer» D. Phenolic resin | |
| 86. |
Polycaprolactam is____________________? |
| A. | Nylon-6 |
| B. | Nylon-66 |
| C. | Dacron |
| D. | Rayon |
| Answer» B. Nylon-66 | |
| 87. |
Polycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent? |
| A. | 50 |
| B. | 75 |
| C. | 90 |
| D. | 99 |
| Answer» D. 99 | |
| 88. |
Polycaprolactam is nothing but __________________? |
| A. | Orlon |
| B. | Nylon-66 |
| C. | Nylon-6 |
| D. | Saran |
| Answer» D. Saran | |
| 89. |
Polycaprolactam is also known as _________________? |
| A. | Nylon-66 |
| B. | Nylon-6 |
| C. | Teflon |
| D. | SBR |
| Answer» C. Teflon | |
| 90. |
Poly Vinyl chloride (PVC) is a ________________ material? |
| A. | Thermoplastic |
| B. | Thermosetting |
| C. | Fibrous |
| D. | Chemically active |
| Answer» B. Thermosetting | |
| 91. |
Poly-methyl-methacrylate, which is an acrylic resin, is also called ___________________? |
| A. | Thiokol |
| B. | Plexiglass or Lucite |
| C. | Dacron |
| D. | Teflon |
| Answer» C. Dacron | |
| 92. |
Poly-tetra-fluoro ethylene (PTFE) is known as_________________? |
| A. | Dacron |
| B. | Teflon |
| C. | Bakelite |
| D. | Celluloid |
| Answer» C. Bakelite | |
| 93. |
Poly-methyl-methacrylate (PMMA) is known as_______________? |
| A. | Bakelite |
| B. | Teflon |
| C. | Perspex |
| D. | Nylon-6 |
| Answer» D. Nylon-6 | |
| 94. |
Plexiglass (also called Lucite) because of its high optical transparency is used for making lenses. It is chemically_________________? |
| A. | Polymethyl methacrylate (PMMA) |
| B. | Polytetrafluroethylene (PTFE) |
| C. | Polycarbonates |
| D. | Phenolic resins |
| Answer» B. Polytetrafluroethylene (PTFE) | |
| 95. |
Plasticisers are added to synthetic plastics to ________________? |
| A. | Impart flexibility |
| B. | Improve workability during fabrication |
| C. | Develop new improved properties not present in the original resin |
| D. | All A., B. and C. |
| Answer» E. | |
| 96. |
Plastic tubes & pipes are generally made by ______________ moulding? |
| A. | Injection |
| B. | Transfer |
| C. | Extrusion |
| D. | Compression |
| Answer» D. Compression | |
| 97. |
Plastic articles are normally produced by _____________ moulding? |
| A. | Green sand |
| B. | Injection |
| C. | Shell |
| D. | Dry sand |
| Answer» C. Shell | |
| 98. |
Pick out the wrong statement regarding the solubility characteristics of high polymers? |
| A. | Greater the degree of cross-linking in the polymer, lesser is its solubility |
| B. | Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble |
| C. | Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent |
| D. | High molecular weight polymers on dissolving gives solution of very low viscosity |
| Answer» E. | |
| 99. |
Phthalic anhydride is used___________________? |
| A. | In making PVC |
| B. | As plasticisers |
| C. | In insecticides manufacture |
| D. | For making nylon-6 |
| Answer» C. In insecticides manufacture | |
| 100. |
Phosphates (e.g., tricresyl, tributyl, tetrabutyl, triphenyl etc.) are added to polymers to act as __________________? |
| A. | Hardeners |
| B. | Anti-shrinkage agents |
| C. | Plasticisers |
| D. | Transparency improver |
| Answer» D. Transparency improver | |