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Mechanical Engineering :: Engineering Materials

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Engineering Materials - Section 4
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Engineering Materials - Section 6

  1. The bond formed by transferring electrons from one atom to another is called

    2. A.
    ionic bond
    B.
    covalent bond
    C.
    metallic bond
    D.
    none of these

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  2. Which of the following property is desirable in parts subjected to shock and impact loads?

    3. A.
    Strength
    B.
    Stiffness
    C.
    Brittleness
    D.
    Toughness

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  3. German silver contains

    4. A.
    1% silver
    B.
    2% silver
    C.
    5% silver
    D.
    no silver

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  4. Connecting rod is, usually, made from

    5. A.
    low carbon steel
    B.
    high carbon steel
    C.
    medium carbon steel
    D.
    high speed steel

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  5. Which of the following inpurity in cast iron makes it hard and brittle?

    6. A.
    Silicon
    B.
    Sulphur
    C.
    Manganese
    D.
    Phosphorus

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  6. There are fourteen atoms in a unit cell of

    7. A.
    body centred cubic space lattice
    B.
    face centred cubic space lattice
    C.
    close packed hexagonal space lattice
    D.
    none of these

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  7. The maximum internal diameter of a blast furnace is about

    8. A.
    3 m
    B.
    6 m
    C.
    9 m
    D.
    12 m

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  8. In spheroidising process, the steel is

    9. A.
    heated below the lower critical temperature and then cooled slowly
    B.
    heated upto the lower critical temperature and then cooled in still air
    C.
    heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C
    D.
    none of the above

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  9. Pearlite is a combination of 87% ferrite and 13% cementite.

    10. A.
    Yes
    B.
    No

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  10. The percentage carbon content in wrought iron is about

    11. A.
    0.02
    B.
    0.1
    C.
    02
    D.
    0.4

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