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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. Which of the following is a low melting point metal ?

    2. A.
    Stainless steel
    B.
    Wrought iron
    C.
    Tin
    D.
    Copper

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  2. Trough of an apron conveyor is made of

    3. A.
    lead lined concrete vessel
    B.
    wood
    C.
    metal
    D.
    either (b) or (c)

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  3. Pick out the wrong statement.

    4. A.
    The toughness of a material decreases, when it is heated.
    B.
    Crane hooks are normally made of wrought iron.
    C.
    Cold working of a metal decreases its fatigue strength.
    D.
    The temperature at which new grains are formed in a metal is known as the recrystallisation temperature.

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  4. Which of the following finds the least commercial use ?

    5. A.
    Pure iron
    B.
    High silicon iron
    C.
    Low carbon steel
    D.
    High carbon steel

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  5. Which of the following is the most widely used insulating material for steam carray-ing pipelines ?

    6. A.
    Ceramic fibre blanket
    B.
    Glass wool and 85% magnesia
    C.
    Vermiculite
    D.
    Slag wool

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  6. Silicon percentage in iron castings to have maximum hardness should be about

    7. A.
    0.3
    B.
    0.5
    C.
    0.8
    D.
    2.5

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  7. Nickel as a material of construction

    8. A.
    is used as an alloying element for both ferrous & non-ferrous alloys.
    B.
    is paramagnetic below 415° C (its Curie temperature).
    C.
    dimagnetic.
    D.
    has a body centred cubic (bcc) crystal lattice structure.

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  8. __________ moulding process can not be used for thermoplastic plastics.

    9. A.
    Compression
    B.
    Extrusion
    C.
    Injection
    D.
    None of these

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  9. Which of the following crystal structures characterises the ferritic stainless steel ?

    10. A.
    Face centred cubic
    B.
    Body centred cubic
    C.
    Simple hexagonal
    D.
    None of these

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  10. 'Semi steel' is

    11. A.
    produced by adding 10-20% steel to the cupola charge.
    B.
    stronger than cast iron.
    C.
    both (a) and (b).
    D.
    neither (a) nor (b).

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