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  • Question

  • The nuts and bolts are made from silicon steel.


  • Options
  • A. Correct
  • B. Incorrect

  • Correct Answer
  • Incorrect 

    • Engineering Materials problems

    Search Results

    • 1. A carbon steel having Brinell hardness number 100 should have ultimate tensile strength closer to

    • Options
    • A. 100 N/mm2
    • B. 200 N/mm2
    • C. 350 N/mm2
    • D. 1000 N/mm2
      • Discuss
    • 2. Which of the following solids are malleable and ductile?

    • Options
    • A. Ionic solids
    • B. Covalent solids
    • C. Metallic solids
    • D. none of these
      • Discuss
    • 3. The delta-iron possesses a body centred cubic space lattice.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 4. Silicon in cast iron

    • Options
    • A. makes the iron soft and easily machinable
    • B. increases hardness and brittleness
    • C. makes the iron white and hard
    • D. aids fusibility and fluidity
      • Discuss
    • 5. The process which improves the machinability of steels, but lowers the hardness and tensile strength, is

    • Options
    • A. normalising
    • B. full annealing
    • C. process annealing
    • D. spheroidising
      • Discuss
    • 6. The essential constituent of a hardened steel is

    • Options
    • A. pearlite
    • B. austenite
    • C. martensite
    • D. troostite
      • Discuss
    • 7. The steel widely used for making precision measuring instruments is

    • Options
    • A. nickel steel
    • B. nickel-chrome steel
    • C. high speed steel
    • D. chrome-vanadium steel
      • Discuss
    • 8. Babbit metal contains

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

    • Options
    • A. mainly pearlite
    • B. mainly ferrite
    • C. ferrite and pearlite
    • D. pearlite and cementite
      • Discuss
    • 10. In a crystalline material, atoms are arranged in definite and orderly manner and form.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss

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