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  • Question
  • The percentage of carbon in cast iron varies from


  • Options
  • A. 0.1 to 0.5
  • B. 0.5 to 1
  • C. 1 to 1.7
  • D. 1.7 to 4.5

  • Correct Answer
  • 1.7 to 4.5 


  • Engineering Materials problems


    Search Results


    • 1. Which of the following material has maximum ductility?

    • Options
    • A. Mild steel
    • B. Copper
    • C. Nickel
    • D. Aluminium
    • Discuss
    • 2. 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
    • 3. The heat treatment process used for softening hardened steel is

    • Options
    • A. carburising
    • B. normalising
    • C. annealing
    • D. tempering
    • Discuss
    • 4. Ferrite and pearlite makes the steel soft and ductile.

    • Options
    • A. Agree
    • B. Disagree
    • Discuss
    • 5. 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
    • 6. In full annealing, the hypo-eutectoid steel is heated from 30° C to 50° C above the upper critical temperature and then cooled

    • Options
    • A. in still air
    • B. slowly in the furnace
    • C. suddenly in a suitable cooling medium
    • D. any one of these
    • Discuss
    • 7. A small percentage of boron is added to steel in order to

    • Options
    • A. increase hardenability
    • B. reduce machinability
    • C. increase wear resistance
    • D. increase endurance strength
    • Discuss
    • 8. Iron-carbon alloys containing 1.7 to 4.3% carbon are known as

    • Options
    • A. eutectic cast irons
    • B. hypo-eutectic cast irons
    • C. hyper-eutectic cast irons
    • D. none of these
    • Discuss
    • 9. Specify the sequence correctly

    • Options
    • A. Grain growth, recrystallisation, stress relief
    • B. Stress relief, grain growth, recrystallisation
    • C. Stress relief, recrystallisation, grain growth
    • D. Grain growth, stress relief, recrystallisation
    • Discuss
    • 10. Malleable cast iron is produced

    • Options
    • A. by adding magnesium to molten cast iron
    • B. by quick cooling of molten cast iron
    • C. from white cast iron by annealing process
    • D. none of these
    • Discuss


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