MCQOPTIONS
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MCQOPTIONS
This section includes 607 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. |
Identify the group in which all the polymers mentioned can be used to make fibres.%! |
| A. | Butadiene copolymers, Polyamides, Urea aldehyde |
| B. | Cellulose derivatives, Polyisoprene, Polyethylene |
| C. | Cellulose derivatives, Polyamides, Polyurathane |
| D. | Polypropylene, Poly vinyl chloride, Silicon |
| Answer» C. Cellulose derivatives, Polyamides, Polyurathane | |
| 52. |
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres. |
| A. | Acrylic |
| B. | Polyester |
| C. | Nylon 6:6 |
| D. | Polypropylene |
| Answer» B. Polyester | |
| 53. |
The major component of acrylic fibres is |
| A. | Polyamides |
| B. | Polyolefins |
| C. | Polyacrylonitrile |
| D. | Polyesters |
| Answer» D. Polyesters | |
| 54. |
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces%! |
| A. | Epoxy resin |
| B. | Polyamide |
| C. | Alkyd resin |
| D. | Phenolic resin |
| Answer» D. Phenolic resin | |
| 55. |
Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is%! |
| A. | Ni |
| B. | V‚ÇÇO‚ÇÖ |
| C. | Fe |
| D. | Aluminium triethyl combined with titanium tetrachloride |
| Answer» E. | |
| 56. |
Thiokol is nothing but%! |
| A. | Polysulphide rubber |
| B. | Polyamide fibre |
| C. | Engineering plastic |
| D. | Exponded polystyrene |
| Answer» B. Polyamide fibre | |
| 57. |
The rate controlling step in the manufacture of silicone rubber is the%! |
| A. | Polymer termination step |
| B. | Condensation of siloxane to silicone |
| C. | Initial hydrolysis of silicone monomer |
| D. | None of these |
| Answer» D. None of these | |
| 58. |
Which of the following is an inorganic polymer?%! |
| A. | Teflon |
| B. | Perspex |
| C. | Silicones |
| D. | Bakelite |
| Answer» D. Bakelite | |
| 59. |
Caprolactum, a raw material for the manufacture of nylon-6, is produced from%! |
| A. | Phenol |
| B. | Naphthalene |
| C. | Benzene |
| D. | Pyridine |
| Answer» D. Pyridine | |
| 60. |
Synthetic polymer produced by using terephthalic acid and ethylene glycol is%! |
| A. | Terylene |
| B. | Nylon-66 |
| C. | PVC |
| D. | Polyesterene |
| Answer» B. Nylon-66 | |
| 61. |
Which of the following is stretched into fibres?%! |
| A. | Saturated polyester |
| B. | Unsaturated polyester |
| C. | Isoprene |
| D. | Bakelite |
| Answer» B. Unsaturated polyester | |
| 62. |
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%! |
| A. | Siloxane elastomers |
| B. | Polyamides |
| C. | Vinyl polymers |
| D. | Urea-formaldehyde resins |
| Answer» E. | |
| 63. |
__________ is not a condensation polymer.%! |
| A. | Teflon |
| B. | Nylon-66 |
| C. | Dacron |
| D. | Polystyrene |
| Answer» B. Nylon-66 | |
| 64. |
The repeating units of PTFE are%! |
| A. | Cl‚ÇÇCH = CH‚ÇÉ |
| B. | F‚ÇÇ C = CF‚ÇÇ |
| C. | F‚ÇÉ C = CF‚ÇÉ |
| D. | FClC = CF‚ÇÇ |
| Answer» C. F‚Äö√á√â C = CF‚Äö√á√â | |
| 65. |
Phenol formaldehyde is produced by condensation polymerisation. It is also known as%! |
| A. | Teflon |
| B. | Bakelite |
| C. | Polyester |
| D. | Nylon-66 |
| Answer» C. Polyester | |
| 66. |
Neoprene is chemically known as%! |
| A. | Polybutandiene |
| B. | Styrene butadiene rubber (SBR) |
| C. | Polyurethane |
| D. | Poly chloroprene |
| Answer» E. | |
| 67. |
Ebonite is a/an%! |
| A. | Highly vulcanised rubber |
| B. | Natural rubber |
| C. | Unvulcanised raw rubber |
| D. | Adhesive |
| Answer» B. Natural rubber | |
| 68. |
Molecular weight of polymers are in the range of%! |
| A. | 10 to 10³ |
| B. | 10²-10⁷ |
| C. | 10⁷-10⁹ |
| D. | 10‚Åπ-10¬π¬π |
| Answer» C. 10‚Äö√Ö‚àë-10‚Äö√ÖœÄ | |
| 69. |
Polymethyl methacrylate (PMMA) is known as%! |
| A. | Bakelite |
| B. | Teflon |
| C. | Perspex |
| D. | Nylon-6 |
| Answer» D. Nylon-6 | |
| 70. |
Bakelite is a/an%! |
| A. | Addition polymer |
| B. | Elastomer |
| C. | Thermoplastic |
| D. | None of these |
| Answer» E. | |
| 71. |
The physical state in which polymers exist is%! |
| A. | Melts & rubber like state |
| B. | Amorphous glassy state |
| C. | Partially crystalline state |
| D. | All of the above |
| Answer» E. | |
| 72. |
The major component of acrylic fibres is%! |
| A. | Polyamides |
| B. | Polyolefins |
| C. | Polyacrylonitrile |
| D. | Polyesters |
| Answer» D. Polyesters | |
| 73. |
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.%! |
| A. | Acrylic |
| B. | Polyester |
| C. | Nylon 6:6 |
| D. | Polypropylene |
| Answer» B. Polyester | |
| 74. |
Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.%! |
| A. | -20 |
| B. | 50 |
| C. | 250 |
| D. | 500 |
| Answer» C. 250 | |
| 75. |
Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styrene-acrylonitfile copolymer with butadiene based elastomer, is a/an%! |
| A. | Rigid foam |
| B. | Engineering plastic |
| C. | Thermosetting polymer |
| D. | Spongy rubber |
| Answer» C. Thermosetting polymer | |
| 76. |
Starting material for the production of SBR is%! |
| A. | Ethyl alcohol |
| B. | Ethylene |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 77. |
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 | |
| 78. |
Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but%! |
| A. | Polyacrylonitrile |
| B. | Polyamide |
| C. | Saturated polyester |
| D. | Alkyd resin |
| Answer» B. Polyamide | |
| 79. |
Lavatory cisterns are normally made of%! |
| A. | Expanded polystyrene |
| B. | Saturated polyester |
| C. | Perspex |
| D. | PVC |
| Answer» B. Saturated polyester | |
| 80. |
Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.%! |
| A. | -20 to 25 |
| B. | 50 to 75 |
| C. | 100 to 150 |
| D. | 250-280 |
| Answer» E. | |
| 81. |
Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically%! |
| A. | Polymethyl methacrylate (PMMA) |
| B. | Polytetraflouroethylene(PTFE) |
| C. | Polycarbonates |
| D. | Phenolic resins |
| Answer» B. Polytetraflouroethylene(PTFE) | |
| 82. |
Polyurathane can not be used for making%! |
| A. | Mattresses & foam |
| B. | Coating material |
| C. | Adhesives |
| D. | Bottles |
| Answer» E. | |
| 83. |
Viscosity of a polymer solution or melt%! |
| A. | Decreases with increase in molecular weight |
| B. | Decreases with increase in temperature |
| C. | Increases with increase in temperature |
| D. | Does not vary with temperature rise |
| Answer» D. Does not vary with temperature rise | |
| 84. |
Most of the plastics are safe to be used upto a maximum temperature of __________ °C.%! |
| A. | 100 |
| B. | 150 |
| C. | 350 |
| D. | 450 |
| Answer» C. 350 | |
| 85. |
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.%! |
| A. | Fibrous |
| B. | Leathery |
| C. | Rubbery |
| D. | Hard |
| Answer» C. Rubbery | |
| 86. |
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic%! |
| A. | Filaments |
| B. | Pipes |
| C. | Buckets |
| D. | Tubings |
| Answer» D. Tubings | |
| 87. |
Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are%! |
| A. | 5°C and 1 kgf/cm² |
| B. | - 20°C and 1 kgf/cm² |
| C. | 0°C and 1 kgf/cm² |
| D. | 0°C and 3 kgf/cm² |
| Answer» B. - 20¬¨‚àûC and 1 kgf/cm¬¨‚⧠| |
| 88. |
__________ is produced by polymerisation of chloroprene.%! |
| A. | Thiokol (a polysulphide rubber) |
| B. | Butyl rubber |
| C. | Neoprene |
| D. | Polyurathane rubber |
| Answer» D. Polyurathane rubber | |
| 89. |
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 | |
| 90. |
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 in aromatic solvents |
| C. | Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent |
| D. | High molecul ar weight polymers on dissolving gives solution of very low viscosity |
| Answer» E. | |
| 91. |
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?%! |
| A. | 50000 |
| B. | 51600 |
| C. | 49200 |
| D. | 50800 |
| Answer» B. 51600 | |
| 92. |
Adipic acid is an intermediate in the manufacture of%! |
| A. | Perspex |
| B. | Nylon-66 |
| C. | Polystyrene |
| D. | Bakelite |
| Answer» C. Polystyrene | |
| 93. |
Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.%! |
| A. | Solid |
| B. | Liquid |
| C. | Combination of solid & liquid |
| D. | Neither solid nor liquid |
| Answer» D. Neither solid nor liquid | |
| 94. |
Bristles of tooth brushes are made of%! |
| A. | Nylon-6 |
| B. | Nylon-66 |
| C. | Polystyrene |
| D. | PVC |
| Answer» C. Polystyrene | |
| 95. |
Which of the following polymers is used for making a non stick coating on frying pans?%! |
| A. | Bakelite |
| B. | Teflon |
| C. | Perspex |
| D. | PVC |
| Answer» C. Perspex | |
| 96. |
*$_Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.? |
| A. | -20 |
| B. | 50 |
| C. | 250 |
| D. | 500 |
| Answer» C. 250 | |
| 97. |
*$_The major component of acrylic fibres is? |
| A. | Polyamides |
| B. | Polyolefins |
| C. | Polyacrylonitrile |
| D. | Polyesters |
| Answer» D. Polyesters | |
| 98. |
*$_Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.? |
| A. | Acrylic |
| B. | Polyester |
| C. | Nylon 6:6 |
| D. | Polypropylene |
| Answer» B. Polyester | |
| 99. |
*$_Bakelite is a/an? |
| A. | Addition polymer |
| B. | Elastomer |
| C. | Thermoplastic |
| D. | None of these |
| Answer» E. | |
| 100. |
*$_The physical state in which polymers exist is? |
| A. | Melts & rubber like state |
| B. | Amorphous glassy state |
| C. | Partially crystalline state |
| D. | All of the above |
| Answer» E. | |