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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. Iron ore is, usually, found in the form of

    2. A.
    oxides
    B.
    carbonates
    C.
    sulphides
    D.
    all of these

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  2. The hardness of steel increases if it contains

    3. A.
    pearlite
    B.
    ferrite
    C.
    cementite
    D.
    martensite

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  3. In full annealing, the hypo-eutectoid steel is heated from 30° C to 50° C above the upper critical temperature and then cooled

    4. A.
    in still air
    B.
    slowly in the furnace
    C.
    suddenly in a suitable cooling medium
    D.
    any one of these

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  4. Ferrite and pearlite makes the steel soft and ductile.

    5. A.
    Agree
    B.
    Disagree

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  5. The lower critical temperature

    6. A.
    decreases as the carbon content in steel increases
    B.
    increases as the carbon content in steel increases
    C.
    is same for all steels
    D.
    depends upon the rate of heating

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  6. Nodular cast iron is produced by adding __________ to the molten cast iron.

    7. A.
    nickel
    B.
    chromium
    C.
    copper
    D.
    magnesium

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  7. Free carbon in iron makes the metal

    8. A.
    soft and gives a coarse grained crystalline structure
    B.
    soft and gives a fine grained crystalline structure
    C.
    hard and gives a coarse grained crystalline structure
    D.
    hard and gives a fine grained crystalline structure

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  8. The cupola is used to manufacture

    9. A.
    pig iron
    B.
    cast iron
    C.
    wrought iron
    D.
    steel

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  9. The type of space lattice found in gamma-iron is

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

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  10. The property of a material due to which it breaks with little permanent distortion, is called

    11. A.
    brittleness
    B.
    ductility
    C.
    malleability
    D.
    plasticity

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