chemical engineering MCQs – Page 260

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 Review each marked answer and report any item that may be outdated or unclear.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

5181. Poly-methyl-methacrylate (PMMA) is known as_______________?
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A. Perspex

B. Nylon-6

C. Teflon

D. Bakelite

5182. ______________are produced by reacting polybasic acid (e.g. Phthalic anhydride) with polyhydric alcohol (e.g., glycerol) ?
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A. Saturated polyester

B. Alkyd resins

C. Amino resins

D. Unsaturated polyester

5183. Out of the following, nucleus of _____________ atom contains the largest number of neutrons?
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A. Pu-239

B. U-235

C. U-239

D. U-238

5184. U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about _____________ percent?
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A. 97

B. 3

C. 85

D. 50

5185. Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids ?
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A. Cellulose

B. Nucleic acids

C. Proteins

D. Starch

5186. Thermoplastic resins usually____________________?
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A. Remain hard as long as they are hot

B. Less brittle than thermosetting resins

C. Cannot be reclaimed from waste

D. Permanent setting resins

5187. The organic acid monomer in nylon-66 is __________________?
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A. Terephthalic acid

B. Sebacic acid

C. Benzoic acid

D. Adipic acid

5188. Epoxy resins (i.e., epoxide polymers) ?
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A. Are made by addition polymerisation reaction only

B. Are cross-linked polymers only

C. Contain an epoxy group (fig bellow) at the ends of the polymer

D. Use emulsion polymerisation methods

5189. Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________?
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A. Pyridine

B. Phenol

C. Naphthalene

D. Benzene

5190. Which is a fertile nuclear fuel ?
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A. U-233

B. U-235

C. Th-232

D. Pu-239

5191. Phosphates (e.g., tricresyl, tributyl, tetrabutyl, triphenyl etc.) are added to polymers to act as __________________?
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A. Hardeners

B. Plasticisers

C. Transparency improver

D. Anti-shrinkage agents

5192. Fast breeder reactors are most usable in India, because of our largest _____________ deposits?
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A. None of these

B. Uranium

C. Thorium

D. Plutonium

5193. Pick out the first order system from among the following ?
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A. Mercury in glass thermometer kept in boiling water

B. Interacting system of two tanks in series

C. Damped vibrator

D. Non-interacting system of two tanks in series

5194. Pick out the correct statement?
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A. Loss of electrons from neutral atoms produces negative ions

B. Gain of electrons by neutral atoms form cations

C. Proton to neutron ratio in a stable nucleus is 2 : 1

D. The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectively

5195. Pick out the wrong statement?
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A. The nucleus of a hydrogen atom is identical with a proton

B. Mass of an electron is about 1/1800th of the lightest nucleus

C. A, ?-ray particle is identical with an electron

D. Positron is heavier than a proton

5196. Choose the correct statement?
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A. Coking tendency decreases with increasing molecular weight

B. Higher pressure enhances coke formation

C. Coking tendency increases with increasing molecular weight

D. Coking is an exothermic reaction

5197. A radioactive substance does not emit________________?
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A. ?-ray

B. ?-ray

C. Position

D. Proton

5198. Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called ________________?
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A. Epoxy resin

B. Teflon

C. Polyurethane

D. Silicone rubber

5199. Biological shield is provided in a nuclear power reactor to protect the ______________ from radiation damage?
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A. Fuel elements

B. Walls of the reactor

C. Operating personnels

5200. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces________________?
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A. Epoxy resin

B. Polyamide

C. Alkyd resin

D. Phenolic resin

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