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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

  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

  5. Hastelloy comprises of

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

  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)

  9. Stainless steel contains

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

  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.

  13. Metal at the top of the electromotive series is

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

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

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

  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)

  19. High speed steel should have high

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