Home / Mechanical Engineering / Engineering Materials :: Section 2

Mechanical Engineering :: Engineering Materials

  1. The property of a material essential for spring materials is

  2. A.
    stiffness
    B.
    ductility
    C.
    resilience
    D.
    plasticity

  3. A steel with carbon above 0.8% is known as hyper-eutectoid steel.

  4. A.
    Agree
    B.
    Disagree

  5. Which of the following material has nearly zero coefficient of expansion?

  6. A.
    Stainless steel
    B.
    High speed steel
    C.
    Invar
    D.
    Heat resisting steel

  7. In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.

  8. A.
    True
    B.
    False

  9. The alloying element which can replace tungsten in high speed steels is

  10. A.
    nickel
    B.
    vanadium
    C.
    cobalt
    D.
    molybdenum

  11. An aluminium alloy with 11% silicon is used for making engine pistons by die casting technique.

  12. A.
    Yes
    B.
    No

  13. Which of the following is an amorphous material?

  14. A.
    Mica
    B.
    Silver
    C.
    Lead
    D.
    Glass

  15. The machinability of steel is improved by adding

  16. A.
    nickel
    B.
    chromium
    C.
    nickel and chromium
    D.
    sulphur, lead and phosphorus

  17. The carbon in the pig iron varies from

  18. A.
    0.1 to 0.5%
    B.
    0.5 to 1%
    C.
    1 to 5%
    D.
    5 to 10%

  19. The type of space lattice found in alpha-iron is

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