chemical engineering MCQs – Page 272

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 Review each marked answer and report any item that may be outdated or unclear.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
5421. Supply of excess air for complete combustion of fuel is necessitated to facilitate___________________?
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A. None of these

B. Attainment of high temperature

C. Attainment of chemical equilibrium

D. Its thorough mixing with air
5422. Cellulose is the main constituent of most ______________ fibres?
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A. Natural

B. Acrylic

C. Spandex

D. Synthetic

5423. The monomer of natural rubber is A. DMT ______________________?
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A. Isoprene

B. 2 methyl-1 propane

C. Both B. and C.
5424. Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the ___________________?
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A. Decorative laminates

B. Strengthening of plaster of Paris

C. Electrical insulation purpose

D. Tanning of leather

5425. Contact lenses for eyes are made of Perspex, which is nothing but_______________?
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A. Polypropylene

B. Polystyrene

C. poly-methyl-methacrylate

D. Unsaturated polyester

5426. Polycaprolactam is nothing but __________________?
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A. Orlon

B. Saran

C. Nylon-66

D. Nylon-6
5427. The calorific value of LPG (50% propane + 50% butane) is about ______________ kcal/Nm3?
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A. 5000

B. 10,000

C. 15,000

D. 25,000
5428. Flexible foam (for mattresses) are usually made of _________________?
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A. PVC

B. Polyurethanes

C. Silicone rubber

D. Polyamides

5429. Polycaprolactam is also known as _________________?
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A. SBR

B. Teflon

C. Nylon-6

D. Nylon-66

5430. ? glucose is the monomer of__________________?
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A. None of these

B. Protein

C. Starch

D. Cellulose
5431. In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________________?
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A. Transportation of coal

B. Preheating the primary air

C. Combustion of coal by supplying it around the burner

D. Drying of coal

5432. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher ___________________?
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A. Tensile strength

B. Melting point

C. Densities

D. Hardness, rigidity & brittleness
5433. Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?
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A. Young

B. Mature

C. Both A & B

D. Neither A nor B

5434. Which of the following polymers shows the highest anti-tacking properties ?
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A. Phenolic resin

B. Epoxy resin

C. Melamine formaldehyde resin

D. Alkyd resin

5435. Overfire burning in a furnace is a phenomenon characterised by the __________________?
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A. Supply of excess fuel

B. None of these

C. Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying

D. Supply of excess air

E. e air</strong>

5436. Collapsible tubes for tooth paste are produced by _____________ extrusion?
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A. Impact

B. Indirect

C. None of these

D. Direct

5437. Alkyd resin is a/an___________________?
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A. Polyamide

B. Addition polymer

C. Polyester

D. Polyolefin

5438. Mott and Wheeler test is conducted on coke to find its _____________________?
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A. Phosphorus content

B. Volatile matter content

C. Reactivity with O2

D. Abradability

5439. Cannel coal and boghead coal are the examples of _________________?
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A. Humic coals

B. Sapropelic coals

C. Liptobiolites

D. None of these

5440. Largest constituent of coke oven gas is_________________?
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A. H2

B. N2

C. CH4

D. CO2