Mechanical Engineering - Engineering Materials
Exercise :: Engineering Materials - Section 4
| 6. |
There are fourteen atoms in a unit cell of |
| A. |
body centred cubic space lattice | | B. |
face centred cubic space lattice | | C. |
close packed hexagonal space lattice | | D. |
none of these |
Answer: Option B
Explanation:
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| 7. |
The maximum internal diameter of a blast furnace is about |
Answer: Option C
Explanation:
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| 8. |
In spheroidising process, the steel is |
| A. |
heated below the lower critical temperature and then cooled slowly | | B. |
heated upto the lower critical temperature and then cooled in still air | | C. |
heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C | | D. |
none of the above |
Answer: Option C
Explanation:
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| 9. |
Pearlite is a combination of 87% ferrite and 13% cementite. |
Answer: Option A
Explanation:
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| 10. |
The percentage carbon content in wrought iron is about |
Answer: Option A
Explanation:
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