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Chemical Engineering :: Materials and Construction

  1. Hydrochloric acid is stored in a__vessel.

  2. A.
    lead lined steel
    B.
    rubber lined steel
    C.
    stainless steel
    D.
    cast iron

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  3. Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its

  4. A.
    high co-efficient of thermal expansion.
    B.
    low thermal conductivity.
    C.
    high corrosion resistance.
    D.
    all (a), (b) and (c).

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  5. Pick out the wrong statement.

  6. A.
    Alloys are harder than their component elements.
    B.
    Presence of silicon in steel decreases its electrical resistance.
    C.
    Karbate is an acid resistant material of construction.
    D.
    Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C.

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  7. Ferric stainless steels compared to austenitic stainless steels

  8. A.
    have lower corrosion resistance.
    B.
    are harder to fabricate.
    C.
    are less ductile and hence less suitable for cold pressing.
    D.
    all (a), (b) and (c).

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  9. Liners of a ball mill are never made of

  10. A.
    lead
    B.
    alloy steel
    C.
    rubber or ceramic material
    D.
    cast iron

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  11. Most of the common metals have __________ crystal structure.

  12. A.
    cubic
    B.
    hexagonal
    C.
    orthorhombic
    D.
    none of these

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  13. Cast iron is a __________ material.

  14. A.
    brittle
    B.
    ductile
    C.
    tough
    D.
    malleable

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  15. Hydrocyanic acid is not shipped in

  16. A.
    cast iron vessels.
    B.
    steel cylinders.
    C.
    aluminium containers.
    D.
    monel drums.

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  17. Spark plugs are made of

  18. A.
    high alumina ceramic
    B.
    metallic carbides
    C.
    corundum
    D.
    carborundum

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  19. The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement.

  20. A.
    brass for low
    B.
    nickel alloys for high
    C.
    both'a' & 'b'
    D.
    aluminium for all

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