logo

CuriousTab

CuriousTab

Discussion


Home Mechanical Engineering Engineering Materials Comments

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


  • Options
  • A. chromium
  • B. nickel
  • C. vanadium
  • D. cobalt

  • Correct Answer
  • cobalt 


  • Engineering Materials problems


    Search Results


    • 1. The ability of a material to absorb energy in the plastic range is called

    • Options
    • A. resilience
    • B. creep
    • C. fatigue strength
    • D. toughness
    • Discuss
    • 2. Iron ore is, usually, found in the form of

    • Options
    • A. oxides
    • B. carbonates
    • C. sulphides
    • D. all of these
    • Discuss
    • 3. The lower critical point for all steels is

    • Options
    • A. 600°C
    • B. 700°C
    • C. 723°C
    • D. 913°C
    • Discuss
    • 4. White cast iron has a high tensile strength and a low compressive strength.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 5. An eutectoid steel consists of

    • Options
    • A. wholly pearlite
    • B. wholly austenite
    • C. pearlite and ferrite
    • D. pearlite and cementite
    • Discuss
    • 6. The type of space lattice found in gamma-iron is

    • Options
    • A. face centred cubic space lattice
    • B. body centred cubic space lattice
    • C. close packed hexagonal space lattice
    • D. none of these
    • Discuss
    • 7. Ferrite and pearlite makes the steel soft and ductile.

    • Options
    • A. Agree
    • B. Disagree
    • Discuss
    • 8. The heat treatment process used for softening hardened steel is

    • Options
    • A. carburising
    • B. normalising
    • C. annealing
    • D. tempering
    • Discuss
    • 9. The lower critical temperature

    • Options
    • A. decreases as the carbon content in steel increases
    • B. increases as the carbon content in steel increases
    • C. is same for all steels
    • D. depends upon the rate of heating
    • Discuss
    • 10. Which of the following material has maximum ductility?

    • Options
    • A. Mild steel
    • B. Copper
    • C. Nickel
    • D. Aluminium
    • Discuss


    Comments

    There are no comments.

Enter a new Comment