Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 15
| 1. |
Stainless steel is welded with difficulty because of |
| A. |
its high melting temperature. | | B. |
chances of cracking. | | C. |
oxide film formation. | | D. |
chromium carbide formation. |
Answer: Option C
Explanation:
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| 2. |
For preparation of porous bearings by powder metallurgy, preferred particle shape is |
| A. |
spherical | | B. |
nodular | | C. |
irregular | | D. |
no preferred shape |
Answer: Option A
Explanation:
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| 3. |
The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm. |
Answer: Option B
Explanation:
|
| 4. |
High speed steel tools retain their hardness upto a temperature of __________ °C. |
Answer: Option C
Explanation:
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| 5. |
Wrought iron does not have |
| A. |
uniform strength in all directions. | | B. |
ability to hold protective coating. | | C. |
high ductility & corrosion resistance. | | D. |
easily weldable characteristics. |
Answer: Option A
Explanation:
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