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.
| 151. |
*/*_Size range of polymer molecules varies from __________ metre.? |
| A. | 10⁻² to 10⁻⁵ |
| B. | 10⁻⁴ to 10⁻⁷ |
| C. | 10⁻¹ to 10⁻² |
| D. | 10⁻⁸ to 10⁻¹⁰ |
| Answer» B. 10‚Äö√Ö¬™‚Äö√Ö¬• to 10‚Äö√Ö¬™‚Äö√Ö‚àë | |
| 152. |
*/*_90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.? |
| A. | -5 |
| B. | 10-30 |
| C. | 250-280 |
| D. | 500-600 |
| Answer» D. 500-600 | |
| 153. |
*/*___________ is a thermosetting plastic.? |
| A. | PVC |
| B. | Polythene |
| C. | Bakelite |
| D. | Polystyrene |
| Answer» D. Polystyrene | |
| 154. |
*/*_Styrene butadiene rubber (SBR) is never used for making? |
| A. | Coated fabrics |
| B. | Front wheel tyres of aeroplanes (i.e., heavy duty tyres) |
| C. | Gaskets |
| D. | Soles of shoes |
| Answer» C. Gaskets | |
| 155. |
*/*___________ polythene is most prone to stress-cracking? |
| A. | High density |
| B. | Low density |
| C. | Cross-linked |
| D. | Linear low density |
| Answer» B. Low density | |
| 156. |
*/*_Vinyl flooring is done using __________ sheets.? |
| A. | Polypropylene |
| B. | PVC |
| C. | Polythene |
| D. | Polyvinyl acetate |
| Answer» C. Polythene | |
| 157. |
*/*___________ scrap can be recycled & reutilised.? |
| A. | Bakelite |
| B. | Epoxy resin |
| C. | Polythene |
| D. | None of these |
| Answer» D. None of these | |
| 158. |
*/*_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 | |
| 159. |
*/*_Thermosplastic materials? |
| A. | Do not soften on application of heat |
| B. | Are heavily branched molecules |
| C. | Are solvent insoluble |
| D. | None of these |
| Answer» E. | |
| 160. |
*/*_Branched chain polymers compared to linear polymers have higher? |
| A. | Density |
| B. | Tensile strength |
| C. | Melting point |
| D. | Degree of irregularity in atomic packing |
| Answer» E. | |
| 161. |
*/*_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. | |
| 162. |
*/*_The monomer of natural rubber is? |
| A. | DMT |
| B. | Isoprene |
| C. | 2 methyl-1-propene |
| D. | Both B and C |
| Answer» E. | |
| 163. |
*/*_Flexible plastic pipes are made of? |
| A. | High density polyethylene (HDPE) |
| B. | Low density polyethylene (LDPE) |
| C. | Polypropylene |
| D. | Unsaturated polyester |
| Answer» C. Polypropylene | |
| 164. |
*/*_Which of the following is not a natural polymer?? |
| A. | Nucleic acids e.g. RNA and DNA |
| B. | Polysaccharides |
| C. | Polyisoprene |
| D. | Polyurethane |
| Answer» E. | |
| 165. |
*/*_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? |
| A. | Cross linked polystyrene |
| B. | Phenol formaldehyde resins |
| C. | Polyesters |
| D. | Polyamides |
| Answer» B. Phenol formaldehyde resins | |
| 166. |
*/*_Which of the following is an elastomer?? |
| A. | Thiokol |
| B. | Phenol formaldehyde |
| C. | Urea formaldehyde |
| D. | Polystyrene |
| Answer» B. Phenol formaldehyde | |
| 167. |
*/*_Cellulose content in bomboo fibre is about __________ percent.? |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 168. |
*/*_Which of the following rubbers has the widest service temperature range (-75 to 275°C) ?? |
| A. | Butyl rubber |
| B. | Silicon rubber |
| C. | Nitrile rubber |
| D. | Silicone rubber |
| Answer» E. | |
| 169. |
*/*_Cellulose is the main contituent of most __________ fibres.? |
| A. | Acrylic |
| B. | Spandex |
| C. | Synthetic |
| D. | Natural |
| Answer» E. | |
| 170. |
*/*_Silicone resins, which are highly water repellant and has good heat resistance can not be used? |
| A. | As room temperature adhesive |
| B. | As grease & lubricant |
| C. | Hydraulic fluid for heat transfer |
| D. | Resin for lamination |
| Answer» B. As grease & lubricant | |
| 171. |
*/*_The monomer of poly vinyl chloride (PVC) is? |
| A. | Chloroethene |
| B. | Ethylene dichloride |
| C. | Ethyl chloride |
| D. | Chloroform |
| Answer» B. Ethylene dichloride | |
| 172. |
*/*_Polyvinyl acetate is never used for making? |
| A. | Moulded articles |
| B. | Fibres |
| C. | Adhesives |
| D. | All of the above |
| Answer» B. Fibres | |
| 173. |
*/*_Bakelite is? |
| A. | Same as polytetra flouro ethylene (PTFE) |
| B. | An inorganic polymer |
| C. | Same as thermoset phenol formaldehyde |
| D. | Not a polymer |
| Answer» D. Not a polymer | |
| 174. |
*/*_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 | |
| 175. |
*/*_Styrene butadiene rubber (SBR) as compared to natural rubber has? |
| A. | Poor tensile strength |
| B. | Poorer resistance |
| C. | Greater amount of heat build up heavy loading |
| D. | All of the above |
| Answer» E. | |
| 176. |
*/*___________ is a homopolymer.? |
| A. | Neoprene |
| B. | Bakelite |
| C. | Nylon-66 |
| D. | Terylene |
| Answer» B. Bakelite | |
| 177. |
*/*_Starting material for the production of butadiene in India is? |
| A. | Naphthalene |
| B. | Benzol |
| C. | Ethyl alcohol |
| D. | Phthalic anhydride |
| Answer» D. Phthalic anhydride | |
| 178. |
%_Dacron is a/an_% |
| A. | Polyester |
| B. | Unsaturated polyester |
| C. | Polyamide |
| D. | Inorganic polymer |
| Answer» B. Unsaturated polyester | |
| 179. |
%_Starting material for the production of butadiene in India is_% |
| A. | Naphthalene |
| B. | Benzol |
| C. | Ethyl alcohol |
| D. | Phthalic anhydride |
| Answer» D. Phthalic anhydride | |
| 180. |
%_Styrene butadiene rubber (SBR) as compared to natural rubber has_% |
| A. | Poor tensile strength |
| B. | Poorer resistance |
| C. | Greater amount of heat build up heavy loading |
| D. | All of the above |
| Answer» E. | |
| 181. |
%___________ is a homopolymer._% |
| A. | Neoprene |
| B. | Bakelite |
| C. | Nylon-66 |
| D. | Terylene |
| Answer» B. Bakelite | |
| 182. |
%_Bakelite is_% |
| A. | Same as polytetra flouro ethylene (PTFE) |
| B. | An inorganic polymer |
| C. | Same as thermoset phenol formaldehyde |
| D. | Not a polymer |
| Answer» D. Not a polymer | |
| 183. |
%_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 | |
| 184. |
_ Styrene butadiene rubber (SBR) is never used for making$? |
| A. | Coated fabrics |
| B. | Front wheel tyres of aeroplanes (i.e., heavy duty tyres) |
| C. | Gaskets |
| D. | Soles of shoes |
| Answer» C. Gaskets | |
| 185. |
_ __________ is a thermosetting plastic.$? |
| A. | PVC |
| B. | Polythene |
| C. | Bakelite |
| D. | Polystyrene |
| Answer» D. Polystyrene | |
| 186. |
_ 90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.$? |
| A. | -5 |
| B. | 10-30 |
| C. | 250-280 |
| D. | 500-600 |
| Answer» D. 500-600 | |
| 187. |
_ Size range of polymer molecules varies from __________ metre.$? |
| A. | 10⁻² to 10⁻⁵ |
| B. | 10⁻⁴ to 10⁻⁷ |
| C. | 10⁻¹ to 10⁻² |
| D. | 10⁻⁸ to 10⁻¹⁰ |
| Answer» B. 10‚Äö√Ö¬™‚Äö√Ö¬• to 10‚Äö√Ö¬™‚Äö√Ö‚àë | |
| 188. |
_ Plasticisers are added to synthetic plastics to$? |
| A. | Impart flexibility |
| B. | Improve workability during fabrication |
| C. | Develop new improved properties not present in the original resin |
| D. | All of the above |
| Answer» E. | |
| 189. |
_ Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their$? |
| A. | Molecular sizes |
| B. | Magnitude of intermolecular forces |
| C. | Resistance to heat |
| D. | Polymerisation mechanism |
| Answer» C. Resistance to heat | |
| 190. |
_ __________ polythene is most prone to stress-cracking$? |
| A. | High density |
| B. | Low density |
| C. | Cross-linked |
| D. | Linear low density |
| Answer» B. Low density | |
| 191. |
_ Vinyl flooring is done using __________ sheets.$? |
| A. | Polypropylene |
| B. | PVC |
| C. | Polythene |
| D. | Polyvinyl acetate |
| Answer» C. Polythene | |
| 192. |
_ Polypropylene compared to polythene is$? |
| A. | Harder |
| B. | Stronger |
| C. | Lighter |
| D. | All of the above |
| Answer» E. | |
| 193. |
_ Phenol formaldehyde$? |
| A. | Employs addition polymerisation |
| B. | Employs condensation polymerisation |
| C. | Is a monomer |
| D. | Is an abrasive material |
| Answer» C. Is a monomer | |
| 194. |
_ Perspex can be used as a substitute of glass. Its monomer is$? |
| A. | Methyl methacrylate |
| B. | DMT |
| C. | Butadiene |
| D. | Tetrafluroethylene |
| Answer» B. DMT | |
| 195. |
_ Dacron is a/an$? |
| A. | Polyester |
| B. | Unsaturated polyester |
| C. | Polyamide |
| D. | Inorganic polymer |
| Answer» B. Unsaturated polyester | |
| 196. |
_ __________ scrap can be recycled & reutilised.$? |
| A. | Bakelite |
| B. | Epoxy resin |
| C. | Polythene |
| D. | None of these |
| Answer» D. None of these | |
| 197. |
_ Alkyd resin can not be used for making$? |
| A. | Plasticiser |
| B. | Paint & varnish |
| C. | Fibres |
| D. | Film forming materials |
| Answer» D. Film forming materials | |
| 198. |
_ Which of the following is not a condensation polymer?$? |
| A. | Bakelite |
| B. | Melamine polymer |
| C. | Polymethylmethacrylate (PMMA) |
| D. | None of these |
| Answer» D. None of these | |
| 199. |
_ Liners of bags are usually made of$? |
| A. | Polythene |
| B. | PVC |
| C. | Polypropylene |
| D. | Polyesters |
| Answer» D. Polyesters | |
| 200. |
_ Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used$? |
| A. | For surface coating of automobiles & air crafts |
| B. | For fibre making |
| C. | As plasticiser for PVC & nitrocellulose |
| D. | For film forming materials |
| Answer» C. As plasticiser for PVC & nitrocellulose | |