Discussion
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- Question
The casting ability of aluminium increases when __________ is added to aluminium.
Options- A. copper
- B. magnesium
- C. silicon
- D. lead and bismuth
- Correct Answer
- silicon
- 1. Brittle materials when subjected to tensile loads, snap off without giving any sensible elongation.
Options- A. Yes
- B. No Discuss
- 2. The malleability is the property of a material by virtue of which a material
Options- A. regains its shape and size after the removal of external forces
- B. retains the deformation produced under load permanently
- C. can be drawn into wires with the application of a tensile force
- D. can be rolled or hammered into thin sheets Discuss
- 3. In corrosion resistant properties, bronzes are __________ to brasses.
Options- A. superior
- B. inferior Discuss
- 4. The slow cooling of steel from the __________ results in a coarse grained structure.
Options- A. lower critical point
- B. upper critical point Discuss
- 5. Face centred cubic space lattice is found in gamma-iron, aluminium, copper, lead, silver and nickel.
Options- A. True
- B. False Discuss
- 6. The temperature in the upper part of the blast furnace (zone of reduction) is __________ that of the middle part.
Options- A. equal to
- B. less than
- C. more than Discuss
- 7. In acidic bessemer process, the furnace is lined with
Options- A. silica bricks
- B. a mixture of tar and burnt dolomite bricks
- C. either (a) or (b)
- D. none of these Discuss
- 8. Silicon bronze contains
Options- A. 60% copper, 35% zinc and 5% manganese
- B. 88% copper, 10% tin and 2% zinc
- C. 96% copper, 3% silicon and 1% manganese
- D. 76% copper, 20% silicon and 4% zinc Discuss
- 9. In the middle part of the blast furnace (zone of absorption), the temperature is
Options- A. 400° to 700°C
- B. 800°C to 1000°C
- C. 1200°C to 1300°C
- D. 1500°C to 1700°C Discuss
- 10. Which of the following is a point imperfection?
Options- A. Vacancy
- B. Interstitial imperfection
- C. Frenkel imperfection
- D. all of these Discuss
Engineering Materials problems
Search Results
Correct Answer: Yes
Correct Answer: can be rolled or hammered into thin sheets
Correct Answer: superior
Correct Answer: upper critical point
Correct Answer: True
Correct Answer: less than
Correct Answer: silica bricks
Correct Answer: 96% copper, 3% silicon and 1% manganese
Correct Answer: 800°C to 1000°C
Correct Answer: all of these
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