chemical engineering MCQs – Page 258

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 Review each marked answer and report any item that may be outdated or unclear.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
5141. Neoprene is the trade name of________________?
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A. Styrene butadiene rubber (SBR)

B. Polychlorophrene

C. Polyurethane

D. Phenol formaldehyde

5142. Main constituent of cotton fiber is __________________?
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A. Lignin

B. Starch

C. Cellulose

D. Gelatine

5143. Pick out the wrong statement ?
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A. A catalyst remains unchanged in chemical composition at the end the reaction

B. A catalyst does not alter the final position of equilibrium in a reversible reaction

C. A catalyst initiates a reaction

D. A catalyst is specific in reaction

5144. Polyurethane cannot be used for making____________________?
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A. Bottles

B. Mattresses & foam

C. Adhesives

D. Coating material

5145. The atomic mass of an element is fractional, because ______________________?
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A. It contains neutrons

B. Of uncertainty principle

C. It may have isobars

D. It may have isotopes
5146. Low pressure Zeigler process of polythene manufacture____________________?
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A. Produces very low density polythene

B. Employs a pressure of 30 kgf/cm2

C. Does not use any catalyst for polymerisation

D. Achieves an yield of 95-98% based on ethylene
5147. Pick out the wrong statement ?
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A. Hydrocarbons of high specific gravity (e.g., aromatics) possess the maximum thermal energy per unit weight

B. Hydrocarbons of low specific gravity (e.g., paraffins) possess the maximum thermal energy per unit volume

C. Higher specific gravity of petroleum products means higher C/H ratio

D. Aromatics have lower specific gravity than corresponding paraffins
5148. Addition polymerisation is not involved in the manufacture of_______________?
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A. Poly vinyl chloride

B. Polyhexamethylene adipamide

C. Polystyrene

D. Low density polythene

5149. Candu reactor is a ______________ nuclear reactor?
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A. Fast breeder

B. Highly enriched uranium (85% U-235) fuelled

C. Homogeneous

D. Natural uranium fuelled heavy water cooled & moderated
5150. A fast breeder reactor employs___________________?
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A. Graphite as moderator

B. Molten sodium as coolant as well as moderator

C. Water as coolant

D. U-235 as fuel
5151. Viscose rayon is _______________?
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A. Regenerated cellulose acetate

B. None of these

C. Regenerated cellulose nitrate

D. Cellulose nitrate

5152. Which of the following is generally not used as eord for synthetic rubber tyre casing ?
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A. None of these

B. Nylon

C. Dacron

D. Cellulose
5153. Percentage of the heavy water in ordinary water is around ____________________?
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A. 0.015

B. 32.97

C. 0.71

D. 7.54

5154. Pick out the additive property of lube oil out of following ?
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A. Viscosity

B. API gravity

C. Specific gravity

D. Flashpoint

5155. Pick out the wrong statement ?
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A. A batch reactor cannot be used to study the kinetics of catalytic reaction

B. the products during the final stages of reaction

C. Hold back is defined as the fraction of material that stays longer than the mean residence time

D. For studying a chemical reaction, it is desirable to monitor the reactants during initial stages

E. Study of non-ideal flow reactor is done experimentally by stimulus-response technique

5156. Nylon-6 as compared to nylon-66 is_________________?
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A. Harder

B. Having higher melting point

C. More abrasion resistant

D. None of these
5157. Which of the following is not an ore of uranium ?
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A. Rescolite

B. Kyanite

C. Pitchblende

D. Carnotite

5158. Nylon-6 as compared to nylon 66 has lower ?
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A. Adhesion to rubber

B. Hardness

C. Thermal stability

D. Abrasion resistance
5159. Pick out the correct statement?
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A. Paraffins have higher octane number than corresponding iso-paraffin

B. Paraffins have lower smoke point than aromatics

C. Aviation fuel should have very high cloud point

D. Suitability of kerosene as a fuel & as an illuminant may be determined by char value test

5160. Pick out the correct statement?
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A. Pore volume and porosity of a catalyst is measured by Brunauer-Emmett-Teller (BET)

B. A lower temperature favours the reaction of lower activation energy

C. The dispersion number for a reactor/vessel is uL/D

D. hnique

E. The rate controlling step in a reaction involving many steps is the fastest step