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Chemical Engineering :: Materials and Construction

Materials and Construction - Section 1
Materials and Construction - Section 2
Materials and Construction - Section 3
Materials and Construction - Section 4
Materials and Construction - Section 5
Materials and Construction - Section 6
Materials and Construction - Section 7
Materials and Construction - Section 8
Materials and Construction - Section 9
Materials and Construction - Section 10
Materials and Construction - Section 11

  1. Pick out the wrong statement.

    2. A.
    Metal/alloys having hexagonal crystal lattice structure are less malleable than those having cubic crystal lattice structure.
    B.
    Metal/alloys having body centred cubic (bcc) crystal lattice structure is stronger & less ductile than those having face centred cubic (fcc) crystal lattice structure.
    C.
    Tungsten has a body centred cubic (bcc) crystal lattice structure.
    D.
    Both ferritic & austenitic stainless steel has a face centred cubic (fcc) crystal structure.

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  2. Ability of a material to absorb energy in deformation in the plastic range is characterised as its

    3. A.
    ductility
    B.
    toughness
    C.
    creep
    D.
    resilience

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  3. Monel alloy is

    4. A.
    the costliest of all the alloys of nickel.
    B.
    not suitable for making kitchen utensils.
    C.
    used for making steam valves and turbine blades as it resists steam attack at high temperature.
    D.
    not used in cast and wrought forms.

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  4. Molybdenum steels containing 0.15 to 0.40% molybdenum

    5. A.
    are prone to temper brittleness.
    B.
    are used for automobile parts like gears, axle, shaft, bearings etc.
    C.
    have very poor fatigue resistance.
    D.
    do not contain nickel or chromium or both.

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  5. Kel-F is a material, which is

    6. A.
    chemically known as polychlorotrifluor-oethylene (PTFE).
    B.
    having excellent chemical & high temperature resistance (upto 200°C).
    C.
    having elastomeric properties.
    D.
    all (a), (b) and (c).

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  6. Presence of high amount of silicon in cast iron

    7. A.
    suppresses the decomposition of Fe3 C.
    B.
    increases the formation of graphite.
    C.
    increases the contraction of the metal.
    D.
    reduces its fluidity.

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  7. Rubber lined pumps can be used to pump

    8. A.
    caustic soda
    B.
    chlorinated brine
    C.
    hypochlorous acid
    D.
    all (a), (b) and (c)

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  8. Titanium metal

    9. A.
    exists in three allotropic forms.
    B.
    can not be welded.
    C.
    is used in oceanographic and space exploration applications.
    D.
    none of these.

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  9. Purity of electrical grade aluminium should be ≥ __________ percent.

    10. A.
    95
    B.
    99.5
    C.
    85
    D.
    90

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  10. Maximum consumption of zinc is in

    11. A.
    alloying
    B.
    galvanising
    C.
    utensil manufacture
    D.
    electrical industry

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