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Mechanical Engineering :: Engineering Materials

  1. Dye penetrant method is generally used to locate

  2. A.
    core defects
    B.
    surface defects
    C.
    superficial defects
    D.
    temporary defects

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  3. The charge is fed into the blast furnace through the

  4. A.
    stack
    B.
    throat
    C.
    bosh
    D.
    tuyers

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  5. A small percentage of boron is added to steel in order to

  6. A.
    increase hardenability
    B.
    reduce machinability
    C.
    increase wear resistance
    D.
    increase endurance strength

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  7. Which of the following process of steel making is in operation at Tata Iron and Steel Works, Jamshedpur?

  8. A.
    Bessemer process
    B.
    Open hearth process
    C.
    Duplex process
    D.
    Electric process

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  9. The unit cells

  10. A.
    contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
    B.
    have the same orientation and their similar faces are parallel
    C.
    may be defined as the smallest parallelopiped which could be transposed in three coordinate directions to build up the space lattice
    D.
    all of the above

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  11. Tungsten when added to steel __________ the critical temperature.

  12. A.
    does not effect
    B.
    lowers
    C.
    raises

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  13. Silicon when added to copper improves

  14. A.
    machinability
    B.
    hardness
    C.
    hardness and strength
    D.
    strength and ductility

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  15. The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

  16. A.
    chromium
    B.
    nickel
    C.
    vanadium
    D.
    cobalt

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  17. Cast iron is manufactured in

  18. A.
    blast furnace
    B.
    cupola
    C.
    open hearth furnace
    D.
    bessemer converter

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  19. The lower critical point for all steels is

  20. A.
    600°C
    B.
    700°C
    C.
    723°C
    D.
    913°C

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