chemical engineering materials and construction MCQs – Page 23

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering materials and construction Mcqs
441. Gas holder of a gobar (cow-dung) gas plant is made of___________________?
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A. Aluminium

B. Mild steel

C. Tin

D. Molybdenum stainless steel

442. Cast iron is a ______________ material?
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A. Malleable

B. Ductile

C. Tough

D. Brittle
443. Bog iron used for the adsorption of H2S from coke oven gas is___________________?
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A. An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)

B. None of these

C. Carbon free iron

D. Iron impregnated with resin (usually Bakelite)

444. Coke oven walls are lined with _____________ bricks?
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A. Tar-dolomite

B. Low thermal conductivity

C. Silica

D. Fire clay

445. Muntz metal is a/an alloys of____________________?
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A. Lead & tin

B. Copper & zinc

C. Ferrous material

D. Magnesium & tin

446. The electrical conductivity of a ______________ decreases with rise in temperature?
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A. Dielectric

B. Semi-conductor

C. Metal/alloy

D. None of these

447. Nickel as a material of construction__________________?
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A. Is used as an alloying element for both ferrous & non-ferrous alloys

B. Is paramagnetic below 415 C (its Curie temperature)

C. Diamagnetic

D. Has a body centred cubic (bcc) crystal lattice structure

448. Steel balls for ball bearings are generally made of ______________ steel?
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A. Carbon chrome

B. Free carbon

C. Cast

D. Stainless

449. _______________ is a donor impurity for semi-conductors ?
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A. Gallium

B. Boron

C. None of these

D. Antimony
450. Most of the common metals have ______________ crystal structure?
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A. Cubic

B. Orthorhombic

C. None of these

D. Hexagonal

451. Hardened steel is softened by___________________?
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A. Normalising

B. Carburising

C. Tempering

D. Annealing

452. Metalloid is_______________________?
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A. An element, which exhibits the properties of both metal & non metal

B. Highly electronegative in nature

C. An alloy

D. All A., B. & C.

453. Which of the following is the softest material ?
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A. Calcite

B. Quartz

C. Corundum

D. Fluorite

454. Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower_________________?
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A. Thermal conductivity

B. Corrosion resistance

C. Abundant availability

D. Price

455. Lead pipe is_____________________?
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A. rmal strain

B. Having very low elastic limit resulting in permanent deformation from either mechanical or

C. Usually joined by burning (e.g. by melting to adjacent pieces with a torch)

D. All A., B. and C.

E. Especially resistant to solutions containing H2SO4

456. Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?
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A. Silicon steel

B. Chromium steel

C. Molybdenum steel

D. None of these

457. Which one occupies the lowermost position in the electromotive series of metals ?
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A. Noble metals (Ag, Pt, Au)

B. Zinc

C. Aluminium

D. Alkali metals (K, Na, Li)

458. Ceramic materials fabrication cannot be done by__________________?
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A. Plastic pressing

B. Extrusion

C. Slip casting

D. Welding
459. Lead lined equipments & vessels are suitable for handling __________________?
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A. Sulphuric acid upto 60C

B. All A., B. and C.

C. Hydrochloric acid (10%)

D. Nitric acid

460. Which of the following has no effect on the carbide forming tendency in steels ?
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A. Vanadium

B. Phosphorus

C. Molybdenum

D. Chromium