Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 9
| 41. |
Dislocation cross-slip is difficult in those materials, which have |
| A. |
large number of slip systems. | | B. |
high work hardening rate. | | C. |
coarse grain size. | | D. |
low stacking fault energy. |
Answer: Option D
Explanation:
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| 42. |
Shrinkage allowance on pattern is provided to compensate for shrinkage when the |
| A. |
metal changes from liquid state to solid state at freezing temperature. | | B. |
solid phase temperature drops from freezing temperature to the room temperature. | | C. |
liquid metal temperature drops from pouring temperature to room temperature. | | D. |
liquid metal temperature drops from pouring temperature to freezing temperature. |
Answer: Option B
Explanation:
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| 43. |
Spark plug is provided in a/an |
| A. |
engine having carburettor. | | B. |
diesel engine. | | C. |
compression ignition engine. | | D. |
both(b) & (c). |
Answer: Option A
Explanation:
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| 44. |
Oxyacetylene reducing flame is used while carrying out welding on |
| A. |
alloy steel | | B. |
grey cast iron | | C. |
mild steel | | D. |
high carbon steel |
Answer: Option C
Explanation:
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| 45. |
Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as |
| A. |
Re0.5, Re0.8 | | B. |
Re0.8, Re-0.5 | | C. |
Re0.8, Re0.5 | | D. |
Re-0.8, Re0.5 |
Answer: Option C
Explanation:
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