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Mechanical Engineering :: Engineering Materials

Engineering Materials - Section 1
Engineering Materials - Section 2
Engineering Materials - Section 3
Engineering Materials - Section 4
Engineering Materials - Section 5
Engineering Materials - Section 6

  1. Specify the sequence correctly

    2. A.
    Grain growth, recrystallisation, stress relief
    B.
    Stress relief, grain growth, recrystallisation
    C.
    Stress relief, recrystallisation, grain growth
    D.
    Grain growth, stress relief, recrystallisation

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  2. Thermoplastic materials are those materials which

    3. A.
    are formed into shape under heat and pressure and results in a permanently hard product
    B.
    do not become hard with the application of heat and pressure and no chemical change occurs
    C.
    are flexible and can withstand considerable wear under suitable conditions
    D.
    are used as a friction lining for clutches and brakes

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  3. Which of the following material has maximum ductility?

    4. A.
    Mild steel
    B.
    Copper
    C.
    Nickel
    D.
    Aluminium

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  4. An eutectoid steel consists of

    5. A.
    wholly pearlite
    B.
    wholly austenite
    C.
    pearlite and ferrite
    D.
    pearlite and cementite

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  5. Shock resisting steels should have

    6. A.
    low wear resistance
    B.
    low hardness
    C.
    low tensile strength
    D.
    toughness

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  6. Cast iron is a

    7. A.
    ductile material
    B.
    malleable material
    C.
    brittle material
    D.
    tough material

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  7. The hardness is the property of a material due to which it

    8. A.
    can be drawn into wires
    B.
    breaks with little permanent distortion
    C.
    can cut another metal
    D.
    can be rolled or hammered into thin sheets

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  8. Malleable cast iron is produced

    9. A.
    by adding magnesium to molten cast iron
    B.
    by quick cooling of molten cast iron
    C.
    from white cast iron by annealing process
    D.
    none of these

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  9. Smelting is the process of

    10. A.
    removing the impurities like clay, sand etc. from the iron ore by washing with water
    B.
    expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
    C.
    reducing the ore with carbon in the presence of a flux
    D.
    all of the above

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  10. The percentage of carbon in cast iron varies from

    11. A.
    0.1 to 0.5
    B.
    0.5 to 1
    C.
    1 to 1.7
    D.
    1.7 to 4.5

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