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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).

  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.

  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.

  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

  9. A bearing metal should not have

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

  11. __________ is not a case hardening process.

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

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

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

  15. Invar contains the highest percentage of

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

  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).

  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