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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. The brown smoke during the operation of a bessemer Converter indicates that the

    2. A.
    air is burning out silicon and managanese
    B.
    silicon and manganese has burnt and carbon has started oxidising
    C.
    the converter must be titled to remove the contents of the converter
    D.
    the brown smoke does not occur during the operation of a bessemer converter

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  2. Martensite has needle like structure and is magnetic.

    3. A.
    Correct
    B.
    Incorrect

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  3. Monel metal is an alloy of

    4. A.
    nickel and copper
    B.
    nickel and chromium
    C.
    nickel, chromium and iron
    D.
    copper and chromium

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  4. In induction hardening, the depth of hardening is controlled by controlling the voltage.

    5. A.
    Correct
    B.
    Incorrect

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  5. The austenite is a solid solution of carbon or iron carbide in gamma-iron.

    6. A.
    Correct
    B.
    Incorrect

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  6. Which of the following display properties similar to that of steel?

    7. A.
    Blackheart cast iron
    B.
    Whiteheart cast iron
    C.
    both (a) and (b)
    D.
    none of these

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  7. Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.

    8. A.
    Agree
    B.
    Disagree

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  8. When a low carbon steel is heated upto upper critical temperature

    9. A.
    there is no change in grain size
    B.
    the average grain size is a minimum
    C.
    the grain size increases very rapidly
    D.
    the grain size first increases and then decreases very rapidly

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  9. The steel widely used for motor car crankshafts is

    10. A.
    nickel steel
    B.
    chrome steel
    C.
    nickel-chrome steel
    D.
    silicon steel

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  10. Combined carbon in iron makes the metal

    11. A.
    soft and gives 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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