MCQOPTIONS
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MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Operations Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a double pipe heat exchanger, in the inner side fluid enters at 20℃ and leaves at 45℃. The annulus has steam condensing at 1atm. What is the value of LMTD? |
| A. | 39℃ |
| B. | 66.7℃ |
| C. | 70℃ |
| D. | 40.5℃ |
| Answer» C. 70℃ | |
| 2. |
Consider we have a Double pipe Heat Exchanger, with inner tube of diameter 20mm (neglect thickness) and outer tube of diameter 30mm. We have two fluids A & B (KA = 15W/mK and KB = 20W/mK) we desire to have their flow rates as 15m3/s and 21m3/s respectively. If their Nusselt number after calculation is Nui = 429 and Nuo = 530. What is the overall heat transfer coefficient of the equipment is no fouling exists? |
| A. | 168.4 W/m2K |
| B. | 168.4×103 KW/m2K |
| C. | 188.4 W/m2K |
| D. | 168.4 KW/m2K |
| Answer» E. | |
| 3. |
Consider we have a Double Pipe Heat Exchanger, with the inner tube of diameter 20mm (neglect thickness) and outer tube of diameter 30mm. We have two fluids A & B, we desire to have their flow rates as 15m3/s and 21m3/s respectively. Which fluid pass arrangement would be best suited for the HE? |
| A. | Parallel flow with A in inner pipe and B in the annulus |
| B. | Counterflow with B in inner pipe and A in the annulus |
| C. | Counterflow with A in inner pipe and B in the annulus |
| D. | Parallel flow with B in inner pipe and A in the annulus |
| Answer» D. Parallel flow with B in inner pipe and A in the annulus | |