chemical engineering materials and construction MCQs – Page 24

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 Review each marked answer and report any item that may be outdated or unclear.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
461. Gun metal is an alloy of_________________________?
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A. Manganese, phosphorus and nickel

B. Nickel, tin and copper

C. Copper, phosphorus and nickel

D. Copper, tin and zinc
462. The softest material just next to talc in the Mhos scale is___________________?
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A. Fluorite

B. Feldspar

C. Quartz

D. Gypsum
463. Chilled iron castings are__________________?
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A. None of these

B. Soft on surface

C. Highly wear resistant

D. Easily machinable

464. Corrosion involves exchange of electrons in ____________ corrosion?
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A. Chemical

B. Electrochemical

C. Both A. & B.

D. Neither A. nor B.

465. In SO3 absorber (Contact Process), packing material used is of________________?
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A. Cast iron

B. Chemical stoneware

C. Karbate

D. Mild steel

466. A metallic alloy in which one of the constituent metal is _____________, is called an amalgam?
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A. Tin

B. Zinc

C. Mercury

D. Lead

467. High speed steel should have high___________________?
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A. Toughness

B. Wear resistance

C. Hardenability

D. Both B. & C.
468. Presence of even 0.005% of _____________ in copper makes it highly brittle, rendering it useless for wire-drawing?
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A. Antimony

B. Bismuth

C. Oxygen

D. Arsenic

469. The hardest material just prior to diamond in Mhos scale is_________________?
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A. Topaz

B. Calcite

C. Corundum

D. Carborundum

470. Combination of metals and ceramics are called___________________?
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A. Metalloy

B. Cermets

C. Non-crystalline ceramics

D. Pellets

471. The high expansion metal normally used in the bimetallic thermometer is _______________ temperature measurement?
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A. Brass for low

B. Nickel alloys for high

C. Both A. & B.

D. Aluminium for all

472. Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with__________________?
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A. Karbate

B. Acidic refractory

C. Rubber

D. Lead or acid-proof bricks
473. Wrought iron is a suitable material of construction for handling _____________ solutions?
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A. None of these

B. Concentrated acidic

C. Alkalis & alkaline

D. Dilute acidic

474. Steel pipes are normally manufactured by ______________ process?
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A. Extrusion

B. Electroforming

C. Cold working

D. Forging

475. Cast iron compared to steel is better in__________________?
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A. Strength

B. Ductility

C. Fluidity & castability

D. Malleability

476. Hastelloy comprises of____________________?
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A. Copper and tin

B. Molybdenum and nickel

C. Copper and nickel

D. Lead and tin

477. Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?
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A. Bismuth

B. Arsenic

C. Antimony

D. Both B. and C.
478. Maximum consumption of copper is in__________________?
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A. Utensil manufacture

B. Small scale industries

C. Electrical industry

D. Industrial equipment manufacture

479. ______________ iron is produced, when molten pig iron is allowed to cool gradually?
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A. Grey cast

B. White cast

C. None of these

D. Wrought

480. In cold working of metal as compared to its hot working____________________?
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A. Ductility and impact strength improves

B. Yield stress, hardness and fatigue strength is not at all affected

C. Appreciable strain hardening is produced

D. Cracks and blow holes are eliminated