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Chemical Engineering :: Materials and Construction

  1. The material of construction of bearings is

  2. A.
    cast iron
    B.
    babbit metal
    C.
    pig iron
    D.
    steel

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  3. Wrought iron is a suitable material of construction for handling __________ solutions.

  4. A.
    dilute acidic
    B.
    concentrated acidic
    C.
    alkalis & alkaline
    D.
    none of these

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  5. Hastelloy comprises of

  6. A.
    copper and tin
    B.
    copper and nickel
    C.
    molybdenum and nickel
    D.
    lead and tin

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  7. Metalloid is

  8. 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)

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  9. Stainless steel contains

  10. A.
    chromium and nickel
    B.
    copper
    C.
    aluminium
    D.
    vanadium

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  11. Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower

  12. A.
    price.
    B.
    corrosion resistance.
    C.
    thermal conductivity.
    D.
    abundant availability.

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  13. Metal at the top of the electromotive series is

  14. A.
    least active
    B.
    most stable
    C.
    most active
    D.
    most noble

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  15. Fatigue failure of a material may occur, when it is subjected to __________ stress.

  16. A.
    fluctuating
    B.
    tensile
    C.
    compressive
    D.
    torsion

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  17. Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.

  18. A.
    bismuth
    B.
    arsenic
    C.
    antimony
    D.
    both (b) and (c)

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  19. High speed steel should have high

  20. A.
    toughness
    B.
    wear resistance
    C.
    hardenability
    D.
    both(b) & (c)

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