chemical engineering chemical engineering basics MCQs – Page 30

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs
581. Pick out the wrong statement ?
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A. Both annealing and normalising release the internal stresses of the material besides improving

B. mechanical properties

C. Low carbon steel does not respond to the heat treatment for hardening of the material, hence it

D. subjected to case hardening or surface hardening processes like cyaniding, carburising,

E. riding etc., which produces high carbon outer layers resulting in increase of surface

F. dness

582. ______________ pipe is the most suitable for carrying sanitary drainage?
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A. Cast iron

B. Stainless steel

C. Asbestos cement

D. Reinforced cement concrete

583. ______________ is not used as the control rod material in a nuclear reactor ?
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A. Cobalt

B. Hafnium

C. Boron

D. Cadmium

584. In a furnace with heating element temperature at 1700C, the dominant mechanism of heat transfer will be__________________?
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A. Forced convection

B. Conduction

C. Radiation

D. Natural convection

585. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, K) ?
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A. T2

B. T

C. 1/T

D. 1/T2

586. Which of the following phenomenon/ phenomena is/are diffusion controlled ?
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A. Dislocation climb

B. Recrystallisation

C. Cross-slip

D. Twinning

587. Earing is a defect found in steels after the following metal working operation ?
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A. Rolling

B. Wire drawing

C. Extrusion

D. Deep drawing
588. Oxyacetylene reducing flame is used while carrying out welding on__________________?
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A. Mild steel

B. High carbon steel

C. Grey cast iron

D. Alloy steel

589. Which of the following is resistant to the action of both heat & chemicals ?
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A. Soda lime glass

B. Borosilicate glass

C. None of these

D. Silica glass

590. Often earing defects are found during deep drawing operation, because the __________________?
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A. Sheet material has been given substantial spring back

B. Surface finish of the sheet is poor

C. Starting sheet has normal anisotropy due to its texture

D. Starting sheet has planer anisotropy due to its texture
591. All the atoms of the world comprise of electrons, proton & neutron except that of ______________ atom in which neutron is absent ?
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A. Deuterium

B. Neon

C. Hydrogen

D. Helium

592. A compact estimate about the amount of materials handling between various work stations is obtained from the_____________________?
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A. Gantt chart

B. String diagram

C. Bin chart

D. Travel chart
593. Screws are specified by their _____________ diameters?
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A. Major

B. Pitch

C. None of these

D. Minor

594. Pick out the wrong statement about the machinability of metals. Machinability of a metal ?
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A. Decreases with increase in hardness, in general

B. Decreases with increase in strain hardening tendencies

C. Decreases with increases in tensile strength & decrease in grain size

D. Depend on the composition, microstructure and physical & mechanical properties

595. Age hardening is connected with________________?
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A. Duralumin

B. Gun metal

C. Babbitt metal

D. Stainless steel

596. Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 C. The purpose of electric current supplied to the furnace is to___________________?
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A. Achieve very high purity of aluminium (99.9%)

B. Keep the electrolyte in liquid condition by the generation of heat

C. Electrolytically dissociate alumina

D. Both B. & C.
597. An oxidation process is accompanied with decrease in the____________________?
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A. All A , B. & C.

B. Number of electrons

C. Oxidation number

D. Number of ions

598. The cathode in an electrochemical cell always carries____________________?
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A. Positive charge

B. Positive or negative charge depending upon the nature of the cell

C. Negative charge

D. Zero charge

599. For grinding of softer materials, the grinding wheel should have _________________ grain size ?
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A. Finer

B. Any type of

C. Coarser

D. Medium

600. The most suitable material for die casting is __________________?
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A. Nickel

B. Copper

C. Steel

D. Iron