MCQOPTIONS
Saved Bookmarks
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.
| 351. |
β - glucose is the monomer of$ |
| A. | cellulose |
| B. | starch |
| C. | protein |
| D. | none of these |
| Answer» B. starch | |
| 352. |
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol). |
| A. | Unsaturated polyester |
| B. | Alkyd resins |
| C. | Saturated polyester |
| D. | Amino resins |
| Answer» C. Saturated polyester | |
| 353. |
Bakelite is a/an |
| A. | addition polymer |
| B. | elastomer |
| C. | thermoplastic |
| D. | none of these |
| Answer» E. | |
| 354. |
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 | |
| 355. |
Alkyd resin is a/an |
| A. | polyamide |
| B. | polyester |
| C. | polyolefin |
| D. | addition polymer |
| Answer» C. polyolefin | |
| 356. |
Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.$ |
| A. | -20 |
| B. | 50 |
| C. | 250 |
| D. | 500 |
| Answer» C. 250 | |
| 357. |
Collapsible tubes for tooth paste are produced by __________ extrusion. |
| A. | direct |
| B. | indirect |
| C. | impact |
| D. | none of these |
| Answer» D. none of these | |
| 358. |
__________ scrap can be recycled & reutilised. |
| A. | Bakelite |
| B. | Epoxy resin |
| C. | Polythene |
| D. | none of these |
| Answer» D. none of these | |
| 359. |
In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres. |
| A. | viscose rayon |
| B. | acrylic |
| C. | polyvinyl acetate |
| D. | saturated polyester |
| Answer» E. | |
| 360. |
In nylon-6, the number 6 represents the total number of |
| A. | carbon atoms in the ring. |
| B. | carbon atoms in the linear polymer chain. |
| C. | nitrogen atoms in the ring. |
| D. | hydrogen atoms in the ring. |
| Answer» C. nitrogen atoms in the ring. | |
| 361. |
__________ is normally used for the manufacture of refrigerator components and transistor parts. |
| A. | Polyproylene |
| B. | Polystyrene |
| C. | Polyester |
| D. | Polyurathene |
| Answer» C. Polyester | |
| 362. |
The starting material used for the manufacture of caprolactum is |
| A. | ethyl benzene |
| B. | cyclohexane |
| C. | ethylene glycol |
| D. | DMT |
| Answer» C. ethylene glycol | |
| 363. |
The generic chemical name for the class of polymers which are commerically known as nylons is |
| A. | polyolefins |
| B. | polyamide |
| C. | polyacrylate |
| D. | polyurathane |
| Answer» C. polyacrylate | |
| 364. |
Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is |
| A. | nylon-66 |
| B. | teflon |
| C. | polyester |
| D. | bakelite |
| Answer» C. polyester | |
| 365. |
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¬∞C and 1 kgf/cm2. | |
| 366. |
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. | |
| 367. |
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. | |
| 368. |
A copolymer is formed by the combination of two or more monomer molecules |
| A. | in a chain without the elimination of water. |
| B. | with the elimination of small amount of water. |
| C. | of the same monomer by elimination of small molecules of water. |
| D. | none of these. |
| Answer» B. with the elimination of small amount of water. | |
| 369. |
Polymerisation of poly functional monomers produces polymers having |
| A. | good machanical strength |
| B. | low viscosity |
| C. | low melting point |
| D. | none of these |
| Answer» B. low viscosity | |
| 370. |
Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are |
| A. | 50°C and 3 - 4 kg/cm2 |
| B. | 50°C and 1 kgf/cm2 |
| C. | 250°C and 10 kgf/cm2 |
| D. | 250°C and 1 kgf/cm2 |
| Answer» B. 50¬∞C and 1 kgf/cm2 | |
| 371. |
Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance. |
| A. | polyurathane |
| B. | polysulphone |
| C. | polycarbonate |
| D. | polyester |
| Answer» D. polyester | |
| 372. |
Elastomers are |
| A. | thermosetting material. |
| B. | exemplified by protein derivatives. |
| C. | having high flexural strength. |
| D. | having very high tensile strength and heat resistance. |
| Answer» D. having very high tensile strength and heat resistance. | |
| 373. |
Amino resins are used in paper treatment to improve its |
| A. | wet tear and bursting strength. |
| B. | folding endurance |
| C. | wet rub resistance |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 374. |
A copolymer of vinyl and vinylidine chloride is called |
| A. | treylene |
| B. | orlon |
| C. | saran |
| D. | dacron |
| Answer» D. dacron | |
| 375. |
__________ is produced by polymerisation of chloroprene. |
| A. | Thiokol (a polysulphide rubber) |
| B. | Butyl rubber |
| C. | Neoprene |
| D. | Polyurathane rubber |
| Answer» D. Polyurathane rubber | |
| 376. |
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. 10-4 to 10-7 | |
| 377. |
Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation ? |
| A. | PVC |
| B. | Bakelite |
| C. | PTFE |
| D. | Epoxy resin |
| Answer» B. Bakelite | |
| 378. |
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 | |
| 379. |
Which of the following polymers does not belong to the class of polyacrylate polymer ? |
| A. | PMMA |
| B. | Polyacrylonitrile |
| C. | Polyethyl acrylate |
| D. | None of these |
| Answer» E. | |
| 380. |
__________ moulding is used for shaping of thermosetting plastics exclusively. |
| A. | Compression |
| B. | Injection |
| C. | Transfer |
| D. | Extrusion |
| Answer» D. Extrusion | |
| 381. |
Properties of a polymer is affected by the |
| A. | chain length. |
| B. | intermolecular forces. |
| C. | branching & cross-linking. |
| D. | all (a), (b). |
| Answer» E. | |
| 382. |
Which of the following is not a polymer of two monomers ? |
| A. | Teflon |
| B. | Bakelite |
| C. | SBR |
| D. | None of these |
| Answer» B. Bakelite | |
| 383. |
Main constituent of natural rubber is |
| A. | polystyrene |
| B. | polyisoprene |
| C. | polybutadiene |
| D. | poly chloroprene |
| Answer» C. polybutadiene | |
| 384. |
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 | |
| 385. |
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. | |
| 386. |
__________ is a copolymer. |
| A. | Nylon-66 |
| B. | Polyrophylene |
| C. | PVC |
| D. | Poly tetra flouro ethylene |
| Answer» B. Polyrophylene | |
| 387. |
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). | |
| 388. |
Bristles of tooth brushes are made of |
| A. | nylon-6 |
| B. | nylon-66 |
| C. | polystyrene |
| D. | PVC |
| Answer» C. polystyrene | |
| 389. |
Polymers are |
| A. | micromolecules |
| B. | macromolecules |
| C. | sub-micromolecules |
| D. | none of these |
| Answer» C. sub-micromolecules | |
| 390. |
Polypropylene is preferred to polythene, because the former is |
| A. | non-inflammable |
| B. | harder |
| C. | stronger |
| D. | both(b) & (c) |
| Answer» E. | |
| 391. |
Which of the following polymers shows the highest anti-tacking properties ? |
| A. | Melamine formaldehyde resin |
| B. | Phenolic resin |
| C. | Epoxy resin |
| D. | Alkyd resin |
| Answer» B. Phenolic resin | |
| 392. |
Valcunisation of rubber decreases its |
| A. | tensile strength. |
| B. | resistance to organic solvents. |
| C. | tackiness. |
| D. | working temperature range. |
| Answer» D. working temperature range. | |
| 393. |
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. | |
| 394. |
Plastic articles are normally produced by __________ moulding. |
| A. | green sand |
| B. | injection |
| C. | shell |
| D. | dry sand |
| Answer» C. shell | |
| 395. |
Low density polythene as compared to high density polythene is |
| A. | harder |
| B. | tougher |
| C. | chemically inert |
| D. | more flexible |
| Answer» E. | |
| 396. |
Nylon-66 compared to nylon-6 has |
| A. | lower melting point. |
| B. | more abrasion resistant properties. |
| C. | higher hardness. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 397. |
Glyptal used in the manufacture of paints & lacquers is a __________ polymer. |
| A. | polyamide |
| B. | polystyrene |
| C. | polyester |
| D. | polyacrylonitrile |
| Answer» D. polyacrylonitrile | |
| 398. |
Adipic acid is an intermediate in the manufacture of |
| A. | perspex |
| B. | nylon-66 |
| C. | polystyrene |
| D. | bakelite |
| Answer» C. polystyrene | |
| 399. |
Most commonly used rubber vulcanisation agent is |
| A. | sulphur |
| B. | bromine |
| C. | platinum |
| D. | alumina |
| Answer» B. bromine | |
| 400. |
In condensation polymerisation as compared to addition polymerisation |
| A. | the monomers are unsaturated compounds. |
| B. | no co-product is lost. |
| C. | the monomers contain two functional groups. |
| D. | generally only one monomer is involved |
| Answer» D. generally only one monomer is involved | |