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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