MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
What is the unit of Fouling factor (Rf) in F.P.S system? |
| A. | Btu/hr ft2℉ |
| B. | Btu/hr ℉ |
| C. | Btu/hr P℉ |
| D. | Btu/hr P2℉ |
| Answer» D. Btu/hr P2℉ | |
| 2. |
Consider we have a Double Pipe Heat Exchanger, with the inner tube of Outer diameter 20mm (thickness 2mm) and outer tube of inner diameter 30mm. What is the overall heat transfer coefficient if the convective heat transfer coefficient for annulus side is 496 W/m2K and for the inner tube is 530 W/m2K? |
| A. | 228.6 W/m2K |
| B. | 220 W/m2K |
| C. | 256.2 W/m2K |
| D. | 212 W/m2K |
| Answer» B. 220 W/m2K | |
| 3. |
To calculate the efficiency of a double pipe heat exchanger, the formula is |
| A. | € = \(\frac{X}{Maximum \, possible \, rate \, of \, Heat \, Transfer}\), where X stands for _________ |
| B. | Clean tube rate of heat transfer |
| C. | Experimental rate of heat transfer |
| D. | Actual rate of heat transfer |
| E. | Minimum rate of heat transfer |
| Answer» D. Actual rate of heat transfer | |
| 4. |
Consider we have a Double Pipe Heat Exchanger, with the inner tube of Outer diameter 20mm (thickness 2mm) and outer tube of inner diameter 30mm. We have two fluids A & B, we desire to have their flow rates as 15 Kg/s and 21 Kg/s respectively. Calculate the convective heat transfer coefficient from tube to annulus side. (Given Nusselt number on tube side = 496 and K = 15W/mK) |
| A. | 2067 W/m2K |
| B. | 1653 W/m2K |
| C. | 1623 W/m2K |
| D. | 1673 W/m2K |
| Answer» C. 1623 W/m2K | |
| 5. |
When we calculate the overall heat transfer coefficient U= \(\frac{X×ho}{X+ho}\), what is the value X? |
| A. | hi, heat transfer coefficient for inner tube for inner side |
| B. | hio, heat transfer coefficient for inner tube for outer side |
| C. | hoi, heat transfer coefficient for annulus for inner side |
| D. | ho, heat transfer coefficient for annulus side |
| Answer» C. hoi, heat transfer coefficient for annulus for inner side | |
| 6. |
Consider we have a Double Pipe Heat Exchanger, with the inner tube of Outer diameter 20mm (thickness 2mm) and outer tube of inner diameter 30mm. We have two fluids A & B, we desire to have their flow rates as 15Kg/s and 21Kg/s respectively. Calculate the equivalent diameter dor the calculation of convective heat transfer coefficient for the ANNULUS side |
| A. | 10mm |
| B. | 20mm |
| C. | 25mm |
| D. | 35mm |
| Answer» D. 35mm | |
| 7. |
Consider we have a Double Pipe Heat Exchanger, with the inner tube of Outer diameter 20mm (thickness 2mm) and outer tube of inner diameter 30mm. We have two fluids A & B, we desire to have their flow rates as 15Kg/s and 21Kg/s respectively. What is the value of Hydraulic diameter for the annulus tube? |
| A. | 20mm |
| B. | 15mm |
| C. | 25mm |
| D. | 10mm |
| Answer» E. | |
| 8. |
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 (both with viscosity 2.5×10-5Pa-s), we desire to have their flow rates as 15 Kg/s and 21 Kg/s respectively. What is the Reynolds number for this setup for the inner pipe? |
| A. | 12000 |
| B. | 13000 |
| C. | 15000 |
| D. | 14000 |
| Answer» B. 13000 | |