chemical engineering MCQs – Page 271

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
5401. Polycaprolactam (Nylon 6) is produced by the condensation polymerisation of caprolactam at 240-280C in which the conversion of caprolactam is about ______________ percent?
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A. 90

B. 50

C. 99

D. 75

5402. Nylon-66 is manufactured from ____________________?
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A. Dimethyl terephthalate (DMT) and ethylene glycol

B. Maleic anhydride and Hexamethylene diamine

C. Adipic acid and Hexamethylene diamine

D. Caprolactam

5403. Phenol formaldehyde __________________?
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A. Employs addition polymerisation

B. Employs condensation polymerisation

C. Is an abrasive material

D. Is a monomer

5404. Size range of polymer molecules varies from __________ meter?
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A. 10-2 to 10-5

B. 10-1 to 10-2

C. 10-8 to 10-10

D. 10-4 to 10-7

5405. Dacron (or Treylene) fibres as compared to nylon fibres have_____________________?
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A. Poorer resistance to alkalis

B. Better heat & acid resistant properties

C. All A., B. and C.

D. Poorer dyeability

5406. Alkyd resin cannot be used for making_________________?
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A. Film forming materials

B. Fibers

C. Paint & varnish

D. Plasticiser

5407. _______________ is a natural fiber?
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A. Dacron

B. Nylon-6

C. None of these

D. Cellulose
5408. The physical state in which polymers exist is___________________?
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A. Partially crystalline state

B. All A., B. and C.

C. Amorphous glassy state

D. Melts & rubber like state

5409. Thiokol is nothing but____________________?
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A. Polyamide fibre

B. Engineering plastic

C. Polysulphide rubber

D. Expanded polystyrene

5410. Thermoplastic materials___________________?
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A. Are heavily branched molecules

B. Do not soften on application of heat

C. None of these

D. Are solvent insoluble

5411. Coal is pulverised before burning in large capacity boiler furnaces mainly to____________________
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A. Facilitate easy ash removal

B. Ensure its complete combustion

C. Enhance its calorific value

D. Provide trouble free operation

5412. Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ C?
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A. 50

B. 500

C. 250

D. -20

5413. Phenol formaldehyde is produced by condensation polymerisation. It is also known as_________________?
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A. Nylon-66

B. Bakelite

C. Teflon

D. Polyester

5414. Acrylonitrile is mainly used in the _____________ industry?
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A. Polymer

B. Dyeing

C. Photographic

D. Printing

5415. _______________ is normally used for the manufacture of refrigerator components and transistor parts?
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A. Polyurethane

B. Polystyrene

C. Polyester

D. Polypropylene

5416. Advantages of fluidised bed combustion are ____________________?
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A. Lower furnace operating temperature

B. High heat transfer rate

C. All A., B. & C.

D. Reduced NOx formation in flue gas

5417. _____________ moulding is used for shaping of thermosetting plastics exclusively?
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A. Transfer

B. Extrusion

C. Injection

D. Compression

5418. Which of the following is a polymer of Hexamethylene diamine and adipic acid ?
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A. Nylon-6, 10

B. Nylon-6

C. Epoxy resin

D. Nylon-66
5419. Nitrile rubber is produced by the polymerisation of_________________?
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A. Acrylonitrile & styrene

B. Acrylonitrile & butadiene

C. Isobutylene & isoprene

D. None of these

5420. Coke oven gas burns with a yellowish flame, because of the presence of __________________?
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A. H2

B. CO2

C. CH4

D. NH3