| 1. | Reynold's analogy states that
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| a. | A |
| b. | B |
| c. | C |
| d. | D |
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Answer: (a).A
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| 2. | The following equation, corresponds to __________ analogy.
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| a. | Von-Karmann |
| b. | Reynolds |
| c. | Colburn |
| d. | Prandtl |
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Answer: (d).Prandtl
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| 3. | Out of the following four assumptions used in the derivation of the equation for LMTD given by below equation, which one is subject to the largest deviation in practice ?
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| a. | Constant overall heat transfer co-efficient. |
| b. | Constant rate of fluid flow. |
| c. | Constant specific heat. |
| d. | No partial phase change in the system. |
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Answer: (b).Constant rate of fluid flow.
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| 4. | For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number)
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| a. | A |
| b. | B |
| c. | C |
| d. | D |
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Answer: (b).B
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| 5. | The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by
 |
| a. | A |
| b. | B |
| c. | C |
| d. | D |
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Answer: (d).D
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