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Materials and Construction problems


  • 1. Cementite is

  • Options
  • A. Fe3C chemically.
  • B. a compound of carbon and iron.
  • C. characterised by an orthorhombic crystal structure.
  • D. all (a), (b) and (c).
  • Discuss
  • 2. Refined acetic acid storage vessel are made of

  • Options
  • A. copper
  • B. aluminium
  • C. high carbon steel
  • D. nickel
  • Discuss
  • 3. Which of the following crystal structures characterises the austenitic stainless steel?

  • Options
  • A. Simple hexagonal
  • B. Body centred cubic
  • C. Face centred cubic
  • D. None of these
  • Discuss
  • 4. Cermets are __________ materials.

  • Options
  • A. refractory
  • B. reinforced
  • C. abrasive
  • D. fully metallic
  • Discuss
  • 5. Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and

  • Options
  • A. moving mercury and graphite.
  • B. graphite and moving mercury.
  • C. moving mercury and carbon.
  • D. moving mercury and crimped steel wire.
  • Discuss
  • 6. The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability?

  • Options
  • A. Lead
  • B. Copper
  • C. Aluminium
  • D. Wrought iron
  • Discuss
  • 7. Percentage elongation of a material is a measure of its

  • Options
  • A. ductility
  • B. brittleness
  • C. toughness
  • D. malleability
  • Discuss
  • 8. Hammers and railway rails are normally made of

  • Options
  • A. mild steel
  • B. dead mild steel
  • C. medium carbon steel
  • D. high carbon steel
  • Discuss
  • 9. The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.

  • Options
  • A. 0.2
  • B. 2
  • C. 4
  • D. 8
  • Discuss
  • 10. Zinc is not used

  • Options
  • A. for producing zinc base die casting alloys.
  • B. in its oxide form as pigments.
  • C. as anode for corrosion prevention in boiler.
  • D. as an alloying element in various bronzes.
  • Discuss

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