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Chemical Engineering :: Materials and Construction

  1. Graphite is a good

  2. A.
    thermal & electrical insulator.
    B.
    conductor of heat.
    C.
    conductor of electricity.
    D.
    both (b) & (c).

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  3. Lead alone is not used in storing equipment, because it

  4. A.
    is very costly.
    B.
    corrodes easily.
    C.
    is having low creep strength.
    D.
    none of these.

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  5. H2SO4 (< 50% concentration) is corrosive to

  6. A.
    aluminium, mild steel, stainless steel, concrete & tin.
    B.
    copper, cast iron & high silicon iron (14% Si).
    C.
    rubber (butyl and hard), silicone rubber & teflon.
    D.
    glass, graphite, porcelain & stoneware.

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  7. In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of

  8. A.
    concrete
    B.
    wood
    C.
    steel
    D.
    porcelain

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  9. A bearing metal should not have

  10. A.
    enough plasticity.
    B.
    low thermal conductivity.
    C.
    low co-efficient of friction.
    D.
    high toughness.

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  11. __________ is not a case hardening process.

  12. A.
    Carburising
    B.
    Nitriding
    C.
    Cyaniding
    D.
    Annealing

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  13. Materials having __________ lattice structure are usually most ductile.

  14. A.
    f.c.c.
    B.
    b.c.c.
    C.
    h.c.p.
    D.
    cubic

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  15. Invar contains the highest percentage of

  16. A.
    vanadium
    B.
    iron
    C.
    tungsten
    D.
    cobalt

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  17. Metalloid is

  18. A.
    highly electronegative in nature.
    B.
    an element which exhibits the properties of both metal & non-metal.
    C.
    an alloy.
    D.
    all (a), (b) and (c).

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  19. The ability of a material to absorb energy in the elastic range is a measure of its

  20. A.
    toughness
    B.
    resilience
    C.
    malleability
    D.
    brittleness

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