Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 3
| 41. |
Dry saturated steam can be converted into superheated steam by |
| A. |
increasing its cross-sectional area of flow. | | B. |
passing it through a pressure reducing valve. | | C. |
forcing it downwards through a vertical tube. | | D. |
none of these |
Answer: Option B
Explanation:
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| 42. |
Pick out the wrong statement. |
| A. |
Copper is the metal having the highest electronic conductivity. | | B. |
Hardenability & weldability of metals are inversely related. | | C. |
Covalant bonding formed by sharing of electrons is present in all semi-conductor materials. | | D. |
Glass transition temperature applies to 'polymers' but not to 'glasses'. |
Answer: Option A
Explanation:
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| 43. |
Increasing sulphur content in pig iron tends to make it |
| A. |
soft | | B. |
hard | | C. |
tough | | D. |
ductile & malleable |
Answer: Option B
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. |
M10 index of coke indicates its |
| A. |
compressive strength. | | B. |
hardness. | | C. |
abrasion resistance. | | D. |
impact strength. |
Answer: Option C
Explanation:
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