Chemical Engineering - Heat Transfer
Exercise :: Heat Transfer - Section 1
| 6. |
When vaporisation takes place directly at the heating surface, it is called |
| A. |
film boiling | | B. |
nucleate boiling | | C. |
vapour binding | | D. |
none of these |
Answer: Option B
Explanation:
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| 7. |
Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) |
Answer: Option A
Explanation:
|
| 8. |
Reynold's analogy states that |
| A. |
Nst α f | | B. |
Nst α NRe | | C. |
NNu α f | | D. |
NRe α f |
Answer: Option A
Explanation:
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| 9. |
With increase in temperature, the thermal conductivity of non-metallic amorphous solids |
| A. |
decreases | | B. |
increases | | C. |
remains constant | | D. |
first decreases upto certain temperature and then increases |
Answer: Option B
Explanation:
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| 10. |
Fourier's law applies to the heat transfer by |
| A. |
convection | | B. |
radiation | | C. |
conduction | | D. |
all (a), (b) & (c) |
Answer: Option C
Explanation:
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