Discussion
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- Question
The slow cooling of steel from the __________ results in a coarse grained structure.
Options- A. lower critical point
- B. upper critical point
- Correct Answer
- upper critical point
- 1. Face centred cubic space lattice is found in gamma-iron, aluminium, copper, lead, silver and nickel.
Options- A. True
- B. False Discuss
- 2. The portion of the blast furnace above its widest cross-section is called
Options- A. hearth
- B. stack
- C. bosh
- D. throat Discuss
- 3. Which of the following statement is wrong?
Options- A. The spheroidising process is usually applied to high carbon tool steels which are difficult to machine
- B. In spheroidising process, the cementite in the granular form is produced in the structure of steel
- C. The annealing process causes complete recrystallisation in steels which have been severely cold worked and a new grain structure is formed
- D. none of the above Discuss
- 4. The limestone in the charge of a blast furnace decomposes to give lime and carbon dioxide. The lime thus obtained
Options- A. controls the grade of pig iron
- B. acts as an iron-bearing mineral
- C. supplies heat to reduce ore and melt the iron
- D. forms a slag by combining with impurities Discuss
- 5. The temperature point at which the change starts on heating the steel is called
Options- A. lower critical point
- B. upper critical point
- C. point of recalescence
- D. point of decalescence Discuss
- 6. In corrosion resistant properties, bronzes are __________ to brasses.
Options- A. superior
- B. inferior Discuss
- 7. 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
- 8. Brittle materials when subjected to tensile loads, snap off without giving any sensible elongation.
Options- A. Yes
- B. No Discuss
- 9. The casting ability of aluminium increases when __________ is added to aluminium.
Options- A. copper
- B. magnesium
- C. silicon
- D. lead and bismuth Discuss
- 10. 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
Engineering Materials problems
Search Results
Correct Answer: True
Correct Answer: stack
Correct Answer: none of the above
Correct Answer: forms a slag by combining with impurities
Correct Answer: lower critical point
Correct Answer: superior
Correct Answer: can be rolled or hammered into thin sheets
Correct Answer: Yes
Correct Answer: silicon
Correct Answer: less than
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