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  • Question
  • Presence of nickel in steel improves its


  • Options
  • A. corrosion resistance.
  • B. cutting ability.
  • C. wear resistance.
  • D. all (a), (b) and (c).

  • Correct Answer
  • corrosion resistance. 


  • Materials and Construction problems


    Search Results


    • 1. Sulphur melting pit in the sulphuric acid plant is made of

    • Options
    • A. lead lined stainless steel.
    • B. cast iron.
    • C. steel or cement-brick lined.
    • D. hard wood.
    • Discuss
    • 2. The main purpose of galvanising iron sheets is to

    • Options
    • A. harden the surface.
    • B. increase its glossiness and lustre.
    • C. prevent the action of water.
    • D. prevent the action of oxygen.
    • Discuss
    • 3. Constantan is an alloy of

    • Options
    • A. Cu (55%) & Sn (45%).
    • B. Cu (55%) & Ni (45%).
    • C. Pt (95%) & Rh (10%).
    • D. Fe (80%) & Ni (20%).
    • Discuss
    • 4. The metals occuring at the lower most position in the electromotive series

    • Options
    • A. do not resist corrosion.
    • B. resist corrosion very strongly.
    • C. are very brittle.
    • D. are heat insulators.
    • Discuss
    • 5. Ceramic recuperators are generally made of

    • Options
    • A. silicon carbide.
    • B. calcium carbide.
    • C. fireclay bricks.
    • D. high alumina bricks.
    • Discuss
    • 6. Shock resisting steels should possess high

    • Options
    • A. hardness
    • B. toughness
    • C. tensile strength
    • D. wear resistance
    • Discuss
    • 7. Acetylene gas holder is made of

    • Options
    • A. copper
    • B. cast iron
    • C. steel
    • D. monel metal
    • Discuss
    • 8. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

    • Options
    • A. Invar
    • B. Constantan
    • C. Chromel
    • D. Alumel
    • Discuss
    • 9. Aluminium as a material of construction suffers from the disadvantage of

    • Options
    • A. very high cost.
    • B. rather low tensile strength.
    • C. very low strength to weight ratio.
    • D. scarce availability.
    • Discuss
    • 10. The addition of antimony in tin-based alloys improves its

    • Options
    • A. rupture strength and hot hardness.
    • B. impact strength and bonding strength.
    • C. deformation resistance.
    • D. wear resistance.
    • Discuss


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