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Materials and Construction problems

  • 1. Coke oven regenerators are made of __________ bricks.

  • Options
  • A. fire clay
  • B. silica
  • C. low thermal conductivity
  • D. high electrical conductivity
    • Discuss
  • 2. The behaviour of visco-elastic material is time dependent. This behaviour is common in __________ materials.

  • Options
  • A. non-crystalline solid
  • B. crystalline
  • C. rubberry
  • D. non-crystalline organic polymeric.
    • Discuss
  • 3. Cast irons are generally specified by their

  • Options
  • A. carbon content
  • B. tensile strength
  • C. hardness
  • D. manufacturing proces
    • Discuss
  • 4. The purpose of nitriding the steel is to

  • Options
  • A. harden its surface.
  • B. soften its surface.
  • C. improve its reliability.
  • D. none of these.
    • Discuss
  • 5. Galvanised iron is

  • Options
  • A. harder
  • B. protected from rusting
  • C. alumina coated iron
  • D. none of these
    • Discuss
  • 6. Which of the following has the highest compressive strength?

  • Options
  • A. Wrought iron
  • B. Cast iron
  • C. Mild steel
  • D. High carbon steel
    • Discuss
  • 7. Cast iron has very high

  • Options
  • A. compressive strength
  • B. ductility
  • C. shock resistance
  • D. resistance to brittleness
    • Discuss
  • 8. German silver used for decorative purposes contains maximum percentage of

  • Options
  • A. silver
  • B. copper
  • C. zinc
  • D. nickel
    • Discuss
  • 9. Dielectric strength of a material is

  • Options
  • A. its energy stroage capacity.
  • B. a magnetic property.
  • C. its capacity to resist the flow of current.
  • D. its capacity to withstand high voltage.
    • Discuss
  • 10. Addition of __________ in steel can help in increasing the depth of hardness.

  • Options
  • A. nickel
  • B. chromium
  • C. vanadium
  • D. tungsten
    • Discuss

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