Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 8
| 26. |
Iron content in Indian iron ore is about __________ percent. |
Answer: Option B
Explanation:
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| 27. |
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is |
| A. |
full annealing | | B. |
bright annealing | | C. |
patenting | | D. |
none of these |
Answer: Option C
Explanation:
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| 28. |
__________ of hard alloy and tool steel is done to make it easily machinable. |
| A. |
Case carburising | | B. |
Tempering | | C. |
Normalising | | D. |
Annealing |
Answer: Option B
Explanation:
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| 29. |
Which of the following mainly decides the current to be employed is arc welding ? |
| A. |
Electrode size | | B. |
Plate thickness | | C. |
Voltage across the arc | | D. |
Welded portion length |
Answer: Option A
Explanation:
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| 30. |
Temperature attained in soldering of metals is about __________ °C. |
| A. |
150-300 | | B. |
400-500 | | C. |
650-800 | | D. |
1000-1100 |
Answer: Option A
Explanation:
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