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Mechanical Engineering :: Engineering Materials

  1. Iron-carbon alloys containing 4.3% carbon are known as hypo-eutectic cast irons.

  2. A.
    Correct
    B.
    Incorrect

  3. The approximate height of a blast furnace is

  4. A.
    10 m
    B.
    20 m
    C.
    30 m
    D.
    40 m

  5. A steel alloy containing 36% nickel is called

  6. A.
    stainless steel
    B.
    high speed steel
    C.
    invar
    D.
    heat resisting steel

  7. The addition of manganese to aluminium improves corrosion resistance.

  8. A.
    Correct
    B.
    Incorrect

  9. The temperature point at which the change ends on heating the steel is called

  10. A.
    lower critical point
    B.
    upper critical point
    C.
    point of recalescence
    D.
    point of decalescence

  11. The malleability is the property of a material due to which it can be rolled or hammered into thin sheets.

  12. A.
    Agree
    B.
    Disagree

  13. The process of inducing carbon to __________ carbon steels in order to give it a hard surface is known as carburising.

  14. A.
    low
    B.
    medium
    C.
    high

  15. Which of the following solids are malleable and ductile?

  16. A.
    Ionic solids
    B.
    Covalent solids
    C.
    Metallic solids
    D.
    none of these

  17. The delta-iron possesses a body centred cubic space lattice.

  18. A.
    Correct
    B.
    Incorrect

  19. Thermosetting plastics are those materials which

  20. 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