Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 9
| 36. |
With increase in temperature, the electrical conductivity of a __________ decreases. |
| A. |
semi-conductor | | B. |
metal or alloy | | C. |
dielectric | | D. |
none of these |
Answer: Option A
Explanation:
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| 37. |
All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in which neutron is absent. |
Answer: Option B
Explanation:
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| 38. |
Which of the following gases cause global warming ? |
| A. |
Carbon monoxide | | B. |
Carbon dioxide | | C. |
Nitrogen | | D. |
Ozone |
Answer: Option B
Explanation:
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| 39. |
Multistage compression of air as compared to single stage compression offers the advantage of |
| A. |
power saving per unit weight of air delivered. | | B. |
moisture elimination in the inter-stage cooler. | | C. |
increased volumetric efficiency. | | D. |
all (a), (b) & (c). |
Answer: Option D
Explanation:
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| 40. |
Fine grained steels have |
| A. |
high brittleness | | B. |
higher tendency to distort | | C. |
high ductility | | D. |
none of these |
Answer: Option C
Explanation:
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