MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is a wrong statement in the context of a convective heat transfer coefficient in laminar film condensation?
|
| A. | power of acceleration due to gravity |
| B. | power of density of liquid |
| C. | power of enthalpy of evaporation |
| D. | power of dynamic viscosity |
| Answer» B. power of density of liquid | |
| 2. |
The critical Reynolds number for transition from laminar to turbulent film condensation is |
| A. | 2000 |
| B. | 1900 |
| C. | 1800 |
| D. | 1700 |
| Answer» D. 1700 | |
| 3. |
Determine the length of a 25 cm outer diameter tube if the condensate formed on the surface of the tube is to be same whether it is kept vertical or horizontal |
| A. | 61.5 cm |
| B. | 71.5 cm |
| C. | 81.5 cm |
| D. | 91.5 cm |
| Answer» C. 81.5 cm | |
| 4. |
For laminar film condensation on a vertical plate, the velocity distribution at a distance from the top edge is given by |
| A. | p g ( y y/2)/ |
| B. | p g ( y y <sup>2</sup>)/ |
| C. | p g ( y y <sup>2</sup>/2)/ |
| D. | p g ( y <sup>2</sup>/2)/ |
| Answer» D. p g ( y <sup>2</sup>/2)/ | |