MCQOPTIONS
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MCQOPTIONS
This section includes 3 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. |
Consider the above problem, find the capacity ratio of the heat exchanger |
| A. | 0.555 |
| B. | 0.444 |
| C. | 0.333 |
| D. | 0.222 |
| Answer» D. 0.222 | |
| 2. |
Water (specific heat = 4 k J/kg K) enters a cross flow exchanger (both fluids unmixed) at 15 degree Celsius and flows at the rate of 7.5 kg/s. It cools air (C P = 1 k J/kg K) flowing at the rate of 10 kg/s from an inlet temperature of 120 degree Celsius. For an overall heat transfer coefficient of 780 k J/m2 hr degree and the surface area is 240 m2, determine the NTU |
| A. | 4.2 |
| B. | 5.2 |
| C. | 6.2 |
| D. | 7.2 |
| Answer» C. 6.2 | |
| 3. |
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference for parallel flow is |
| A. | Does not depend on counter flow |
| B. | Smaller than counter flow |
| C. | Greater than counter flow |
| D. | Equal to counter flow |
| Answer» E. | |