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:
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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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