Discussion
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- Question
Coke oven regenerators are made of __________ bricks.
Options- A. fire clay
- B. silica
- C. low thermal conductivity
- D. high electrical conductivity
- Correct Answer
- fire clay
- 1. 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
- 2. 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
- 3. 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
- 4. Percentage elongation of a material is a measure of its
Options- A. ductility
- B. brittleness
- C. toughness
- D. malleability Discuss
- 5. 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
- 6. 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
- 7. Cast irons are generally specified by their
Options- A. carbon content
- B. tensile strength
- C. hardness
- D. manufacturing proces Discuss
- 8. 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
- 9. Galvanised iron is
Options- A. harder
- B. protected from rusting
- C. alumina coated iron
- D. none of these Discuss
- 10. Which of the following has the highest compressive strength?
Options- A. Wrought iron
- B. Cast iron
- C. Mild steel
- D. High carbon steel Discuss
Materials and Construction problems
Search Results
Correct Answer: as an alloying element in various bronzes.
Correct Answer: 4
Correct Answer: high carbon steel
Correct Answer: ductility
Correct Answer: Lead
Correct Answer: non-crystalline organic polymeric.
Correct Answer: tensile strength
Correct Answer: harden its surface.
Correct Answer: protected from rusting
Correct Answer: High carbon steel
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