chemical engineering MCQs – Page 264

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 Review each marked answer and report any item that may be outdated or unclear.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
5261. Nylon-6 is a_________________?
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A. None of these

B. Thermosetting resin

C. Polyester

D. Polyamide
5262. Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?
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A. 1 kgf/cm2 (gage) and 70C

B. 1000 kgf/cm2 and 100C

C. 7 kgf/cm2 and 700C

D. 7 kgf/cm2 and 70 C
5263. Tubeless tyres are made of ______________ rubber, which is a co-polymer of isoprene & isobutylene?
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A. Butyl

B. Silicone

C. Neoprene

D. Nitrile

5264. Main constituent of the gas produced from a gobar gas plant is___________________?
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A. H2

B. CH4

C. CO2

D. CO

5265. Caking index of a coal is a measure of its _______________________?
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A. Porosity

B. Agglutinating (binding) properties

C. Reactivity

D. Abradability

5266. Gutta percha rubber is_________________?
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A. An isomer of natural rubber

B. Soft & tacky at room temperature

C. Recovered by coagulation of rubber latex

D. A thermosetting resin

5267. A good metallurgical coke___________________?
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A. Should have high porosity

B. Should be brittle

C. Must contain moderate quantities of ash, moisture, sulphur and volatile matters

D. Should have low fusion point of its ash

5268. The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be___________________?
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A. 42.9

B. 27.6

C. 23

D. 47.3

5269. Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ C for producing nylon-6?
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A. -20 to 25

B. 50 to 75

C. 250-280

D. 100 to 150

5270. Cross linked polymers are__________________?
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A. Thermosetting

B. Fibres only

C. Thermoplastic

D. Either A. or B.

5271. Neoprene is a___________________?
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A. None of these

B. Synthetic rubber

C. Monomer

D. Polyester

5272. Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the____________________?
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A. Absorption of gases and vapor

B. Solvent recovery from air and gases

C. Electrode manufacture

D. Decolourisation of sugar

5273. Wind loss resulting from unscientific storage of coal may be the order of about _____________ percent?
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A. 14.5

B. 2.5

C. 10.5

D. 7.5

5274. Bulk density of pulverised coal may be about ______________ kg/m3?
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A. 1000

B. 1500

C. 100

D. 500
5275. The cuprous chloride used in orsat apparatus can absorb___________________?
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A. Only CO

B. Both CO and CO2

C. Both CO and O2

D. All CO, CO2, and O2
5276. Polymers are_________________?
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A. Micro-molecules

B. None of these

C. Sub-micromolecules

D. Macromolecules
5277. The major component of acrylic fibers is__________________?
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A. Polyolefins

B. Polyesters

C. Polyamides

D. Polyacrylonitrile
5278. Calorific value of blast furnace gas is around _____________ KCal/Nm3?
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A. 6500

B. 1800

C. 850

D. 4200

5279. ________________ is produced by polymerisation of chloroprene?
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A. Polyurethane rubber

B. Neoprene

C. Butyl rubber

D. Thiokol (a polysulphide rubber)

5280. Presence of free moisture in coal is most disadvantageous during_________________?
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A. Its pulverisation (as it requires more power)

B. Handling (e.g. when emptying wagons)

C. None of these

D. Combustion of fire slacks on the grates