Chemical Engineering - Heat Transfer
Exercise :: Heat Transfer - Section 6
| 1. |
Choose the correct equation. |
| A. |
Nu = (Re) (Pr) (Gz) | | B. |
Nu = (Re) (Pr) (St) | | C. |
Nu = (Re)(Pr) | | D. |
Nu = (Pr)(St) |
Answer: Option B
Explanation:
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| 2. |
In a forward feed multiple effect evaporator unit |
| A. |
viscosity of liquid is highest in first effect. | | B. |
transfer from effect to effect is done by pumps. | | C. |
no pump is required to withdraw the product from the last effect. | | D. |
none of these. |
Answer: Option D
Explanation:
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| 3. |
In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is |
| A. |
linear | | B. |
hyperbolic | | C. |
parabolic | | D. |
none of these |
Answer: Option C
Explanation:
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| 4. |
For heat flow through very thick walled cylinder, use____mean radius. |
| A. |
arithmetic | | B. |
logarithmic | | C. |
geometric | | D. |
either (a) or (c) |
Answer: Option B
Explanation:
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| 5. |
Indirect contact heat exchangers are preferred over direct contact heat exchangers, because |
| A. |
heat transfer co-efficient are high. | | B. |
there is no risk of contamination. | | C. |
there is no mist formation. | | D. |
cost of equipment is lower. |
Answer: Option B
Explanation:
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