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Mechanical Engineering :: Engineering Materials

  1. Which of the following material has maximum malleability?

  2. A.
    Lead
    B.
    Soft steel
    C.
    Wrought iron
    D.
    Copper

  3. Nichrome contains more iron than Inconel.

  4. A.
    Agree
    B.
    Disagree

  5. Hardness of steel is increased by adding sulphur, lead and phosphorus.

  6. A.
    Yes
    B.
    No

  7. German silver contains

  8. A.
    70% copper and 30% zinc
    B.
    60% copper and 40% zinc
    C.
    59% copper, 40% zinc and 1% tin
    D.
    60.45% copper, 35.2% zinc and 5.35% nickel

  9. The machine tool guide ways are usually hardened by

  10. A.
    vacuum hardening
    B.
    martempering
    C.
    induction hardening
    D.
    flame hardening

  11. Monel metal contains

  12. A.
    65% nickel, 15% chromium and 20% iron
    B.
    68% nickel, 29% copper and 3% other constituents
    C.
    80% nickel and 20% chromium
    D.
    80% nickel, 14% chromium and 6% iron

  13. A fine grained steel

  14. A.
    is less tough and has a greater tendency to distort during heat treatment
    B.
    is more ductile and has a less tendency to distort during heat treatment
    C.
    is less tough and has a less tendency to distort during heat treatment
    D.
    is more ductile and has a greater tendency to distort during heat treatment

  15. Babbit metal contains

  16. A.
    50% tin and 50% antimony
    B.
    66% tin, 30% copper and 4% antimony
    C.
    88% tin, 4% copper and 8% antimony
    D.
    92% tin, 6% copper and 2% antimony

  17. A steel with 0.8% carbon is known as

  18. A.
    eutectoid steel
    B.
    hyper-eutectoid steel
    C.
    hypo-eutectiod steel
    D.
    none of these

  19. When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of

  20. A.
    mainly pearlite
    B.
    mainly ferrite
    C.
    ferrite and pearlite
    D.
    pearlite and cementite