Engineering :: Metallurgy
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| 61. |
The flux used in blast furnace while melting iron ore is |
| A. |
Carbon |
B. |
Oxygen |
| C. |
Sodium chloride |
D. |
Lime stone |
| E. |
Bauxite |
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Answer: Option D
Explanation:
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| 62. |
For each ton of pig iron produced in a blast furnace, the amount of ore used is approximately. |
| A. |
1 ton |
B. |
2 tons |
| C. |
5 tons |
D. |
13 tons |
| E. |
12.5 tons |
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Answer: Option B
Explanation:
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| 63. |
For each ton of pig iron produced from blast furnace, the lime stone used is approximately |
| A. |
0.01 ton |
B. |
0.1 ton |
| C. |
0.4 tom |
D. |
1.4 ton |
| E. |
2.55 tons |
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Answer: Option C
Explanation:
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| 64. |
For each ton of pig iron produced in blast furnace, the quantity of coke required would be roughly |
| A. |
0.1 ton |
B. |
0.25 ton |
| C. |
0.5 ton |
D. |
1.4 ton |
| E. |
1.9 ton |
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Answer: Option D
Explanation:
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| 65. |
Which of the following is by product from blast furnace? |
| A. |
Slag |
B. |
Flue dust |
| C. |
Blast furnace gas |
D. |
All of the above |
| E. |
None of the above |
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Answer: Option D
Explanation:
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| 66. |
The maximum temperature inside a blast furnace gas is of the order of |
Answer: Option C
Explanation:
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| 67. |
Percentage of iron in pig iron approximately |
Answer: Option C
Explanation:
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| 68. |
Which of the following is easiest to bend? |
| A. |
Cast iron |
B. |
Grey pig iron |
| C. |
Mottled pig iron |
D. |
Steel |
| E. |
Wrought iron |
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Answer: Option E
Explanation:
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| 69. |
Which of the following gives granular fracture? |
| A. |
Steel |
B. |
Wrought iron |
| C. |
Cast iron |
D. |
All of the above |
| E. |
None of the above |
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Answer: Option A
Explanation:
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| 70. |
Dilute nitric acid applied to a clean fracture of wrought iron gives |
| A. |
White stain |
B. |
Greenish stain |
| C. |
Blue stain |
D. |
Grey stain |
| E. |
Black stain |
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Answer: Option A
Explanation:
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