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.
| 1. |
Zeigler – Natta catalyst (AlR3 – AlCl3) is used in the polymerisation of_________________? |
| A. | Vinyl acetate |
| B. | Vinyl chloride |
| C. | Propylene |
| D. | Styrene |
| Answer» D. Styrene | |
| 2. |
Zeigler process________________? |
| A. | Produces high density polythene |
| B. | Uses no catalyst |
| C. | Produces low density polythene |
| D. | Employs very high pressure |
| Answer» B. Uses no catalyst | |
| 3. |
Which of the following low molecular weight (<104), soft & waxy polymer is used in „chewing gum‟ ? |
| A. | Cellulose acetate |
| B. | Polyvinyl acetate |
| C. | Thiokol |
| D. | PVC |
| Answer» C. Thiokol | |
| 4. |
Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ? |
| A. | Phosphorous |
| B. | Carbon black |
| C. | Pine oil |
| D. | Rosin |
| Answer» C. Pine oil | |
| 5. |
Which of the following is stretched into fibers ? |
| A. | Saturated polyester |
| B. | Unsaturated polyester |
| C. | Isoprene |
| D. | Bakelite |
| Answer» B. Unsaturated polyester | |
| 6. |
Which of the following is not present in bagasse fiber? |
| A. | Cellulose |
| B. | Lignin |
| C. | Pentogens |
| D. | None of these |
| Answer» E. | |
| 7. |
Which of the following is not a natural fiber ? |
| A. | Silk |
| B. | Viscose rayon |
| C. | Wool |
| D. | Cotton |
| Answer» C. Wool | |
| 8. |
Which of the following is generally not drawn into fiber ? |
| A. | Polyamide |
| B. | Unsaturated polyesters |
| C. | Saturated polyesters |
| D. | Polyacrylonitrile |
| Answer» C. Saturated polyesters | |
| 9. |
Which of the following is a natural polyamide fiber? |
| A. | Wool |
| B. | Silk |
| C. | Cotton |
| D. | None of these |
| Answer» B. Silk | |
| 10. |
Vulcanisation of rubber_____________________? |
| A. | Decreases its tensile strength |
| B. | Increases its ozone & oxygen reactivity |
| C. | Increases its oil & solvent resistance |
| D. | Converts its plasticity into elasticity |
| Answer» E. | |
| 11. |
Vulcanisation of rubber decreases its__________________? |
| A. | Tensile strength |
| B. | Resistance to organic solvents |
| C. | Tackiness |
| D. | Working temperature range |
| Answer» D. Working temperature range | |
| 12. |
Vulcanisation of raw rubber makes it__________________? |
| A. | Soft |
| B. | Less elastic |
| C. | Plastic |
| D. | Tacky |
| Answer» C. Plastic | |
| 13. |
Vulcanisation of rubber does not increase its__________________? |
| A. | Softness |
| B. | Oxidation resistance |
| C. | Weight & strength |
| D. | Elasticity & water solubility |
| Answer» B. Oxidation resistance | |
| 14. |
Vulcanisation of rubber does not increase its_________________? |
| A. | Elasticity |
| B. | Plasticity |
| C. | Ductility |
| D. | None of these |
| Answer» C. Ductility | |
| 15. |
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 | |
| 16. |
Viscose rayon is _______________? |
| A. | Cellulose nitrate |
| B. | Regenerated cellulose nitrate |
| C. | Regenerated cellulose acetate |
| D. | None of these |
| Answer» E. | |
| 17. |
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 | |
| 18. |
Vinyl flooring is done using _____________ sheets? |
| A. | Polypropylene |
| B. | PVC |
| C. | Polythene |
| D. | Polyvinyl acetate |
| Answer» C. Polythene | |
| 19. |
Tyres are made by___________________? |
| A. | Injection moulding |
| B. | Extrusion |
| C. | Rotational moulding |
| D. | Compression moulding |
| Answer» D. Compression moulding | |
| 20. |
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________? |
| A. | 7 kgf/cm2 and 70 °C |
| B. | 1000 kgf/cm2 and 100°C |
| C. | 7 kgf/cm2 and 700°C |
| D. | 1 kgf/cm2 (gage) and 70°C |
| Answer» B. 1000 kgf/cm2 and 100°C | |
| 21. |
_____________ tubes are good substitute for human blood vessels on heart by-pass operation? |
| A. | PVC |
| B. | Polythene |
| C. | Teflon/Dacron |
| D. | Polystyrene |
| Answer» D. Polystyrene | |
| 22. |
Tubeless tyres are made of ______________ rubber, which is a co-polymer of isoprene & isobutylene? |
| A. | Nitrile |
| B. | Silicone |
| C. | Neoprene |
| D. | Butyl |
| Answer» E. | |
| 23. |
Transistor parts and refrigerator components are normally made of_____________________? |
| A. | Polystyrene |
| B. | Polyester |
| C. | High density polythene |
| D. | Polyurethane |
| Answer» B. Polyester | |
| 24. |
Trade name of ______________ is neoprene? |
| A. | Polychlorophrene |
| B. | Polyisoprene |
| C. | Polytetrafluoroethylene |
| D. | Poly vinyl acetate |
| Answer» B. Polyisoprene | |
| 25. |
Thiokol is nothing but____________________? |
| A. | Polysulphide rubber |
| B. | Polyamide fibre |
| C. | Engineering plastic |
| D. | Expanded polystyrene |
| Answer» B. Polyamide fibre | |
| 26. |
Thermosetting resins/polymers as compared to thermoplastic ones are ____________________? |
| A. | Soluble in all organic solvents |
| B. | More brittle |
| C. | Formed by addition polymerisation only |
| D. | Easily reshaped & reused |
| Answer» C. Formed by addition polymerisation only | |
| 27. |
Thermosetting polymers as compared to thermoplastic polymers_____________________? |
| A. | Are formed by addition polymerisation |
| B. | Have three dimensional structure |
| C. | Have linear structure |
| D. | None of these |
| Answer» C. Have linear structure | |
| 28. |
Thermosetting plastic materials___________________? |
| A. | Can be repeatedly melted |
| B. | Is useful for melt casting |
| C. | Cannot be melted after forming |
| D. | Is useful for spinning |
| Answer» D. Is useful for spinning | |
| 29. |
Thermosetting materials_________________? |
| A. | Are cross-linked molecules |
| B. | Soften on application of heat |
| C. | Are solvent soluble |
| D. | None of these |
| Answer» B. Soften on application of heat | |
| 30. |
Thermoplastic resins usually____________________? |
| A. | Remain hard as long as they are hot |
| B. | Cannot be reclaimed from waste |
| C. | Permanent setting resins |
| D. | Less brittle than thermosetting resins |
| Answer» E. | |
| 31. |
Thermoplastic materials___________________? |
| A. | Do not soften on application of heat |
| B. | Are heavily branched molecules |
| C. | Are solvent insoluble |
| D. | None of these |
| Answer» E. | |
| 32. |
Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten__________________? |
| A. | Saturated polyester |
| B. | Polyurethane |
| C. | Polystyrene |
| D. | Either B. or C. |
| Answer» E. | |
| 33. |
Thermocol (expanded polystyrene) is not used for __________________? |
| A. | Low temperature thermal insulation as in refrigerator and air conditioners |
| B. | Acoustic control and ceiling for building |
| C. | High temperature thermal insulation in furnaces |
| D. | Packing of delicate electronic gadgets |
| Answer» D. Packing of delicate electronic gadgets | |
| 34. |
Thermal pyrolysis of ethylene dichloride produces ____________________? |
| A. | Trichloroethylene |
| B. | Vinyl chloride |
| C. | Ethanol amine |
| D. | Ethylene oxide |
| Answer» C. Ethanol amine | |
| 35. |
The synthetic fibres produced from _____________ are known as rayon? |
| A. | Lignin |
| B. | Cellulose |
| C. | Polyamides |
| D. | Ethylene glycol |
| Answer» C. Polyamides | |
| 36. |
The starting material used for the manufacture of caprolactam is________________? |
| A. | Ethyl benzene |
| B. | Cyclohexane |
| C. | Ethylene glycol |
| D. | DMT |
| Answer» C. Ethylene glycol | |
| 37. |
The repeating units of PTFE are___________________? |
| A. | Cl2CH-CH3 |
| B. | F2 C = CF2 |
| C. | F3 C-CF3 |
| D. | FClC = CF2 |
| Answer» C. F3 C-CF3 | |
| 38. |
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 | |
| 39. |
The process involved in converting rubber into a thin sheet or coating it on fabric is called__________________? |
| A. | Extrusion |
| B. | Mastication |
| C. | Calendaring |
| D. | Vulcanisation |
| Answer» D. Vulcanisation | |
| 40. |
The physical state in which polymers exist is___________________? |
| A. | Melts & rubber like state |
| B. | Amorphous glassy state |
| C. | Partially crystalline state |
| D. | All A., B. and C. |
| Answer» E. | |
| 41. |
The organic acid monomer in nylon-66 is __________________? |
| A. | Sebacic acid |
| B. | Terephthalic acid |
| C. | Adipic acid |
| D. | Benzoic acid |
| Answer» D. Benzoic acid | |
| 42. |
The only natural thermoplastic resin, which is a product of animal life is ____________________? |
| A. | Rosin |
| B. | Shellac |
| C. | Amber |
| D. | Copal |
| Answer» C. Amber | |
| 43. |
The monomer of natural rubber is A. DMT ______________________? |
| A. | Isoprene |
| B. | 2 methyl-1 propane |
| C. | Both B. and C. |
| D. | None of these |
| Answer» D. None of these | |
| 44. |
The monomer of poly vinyl chloride (PVC) is__________________? |
| A. | Chloroethane |
| B. | Ethylene dichloride |
| C. | Ethyl chloride |
| D. | Chloroform |
| Answer» B. Ethylene dichloride | |
| 45. |
The monomer for the production of neoprene rubber is_________________? |
| A. | Acetylene |
| B. | Chloroprene |
| C. | Isoprene |
| D. | None of these |
| Answer» C. Isoprene | |
| 46. |
The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is____________________? |
| A. | Polyvinyl alcohol |
| B. | Polyvinyl acetate |
| C. | Polyvinyl butyral |
| D. | PVC |
| Answer» D. PVC | |
| 47. |
The major component of acrylic fibers is__________________? |
| A. | Polyamides |
| B. | Polyolefins |
| C. | Polyacrylonitrile |
| D. | Polyesters |
| Answer» D. Polyesters | |
| 48. |
The main use of butadiene is____________________? |
| A. | As a plasticiser for unsaturated polyester |
| B. | In the manufacture of synthetic rubber |
| C. | As an anti-skimming agent in paint |
| D. | None of these |
| Answer» C. As an anti-skimming agent in paint | |
| 49. |
The inter particle forces between linear chains in nylon-66 are ______________ bonds? |
| A. | Hydrogen |
| B. | Covalent |
| C. | Ionic |
| D. | None of these |
| Answer» B. Covalent | |
| 50. |
The generic chemical name for the class of polymers which are commercially known as nylons is______________________? |
| A. | Polyolefins |
| B. | Polyamide |
| C. | Polyacrylate |
| D. | Polyurethane |
| Answer» C. Polyacrylate | |