MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
A reboiler can act as a _________ |
| A. | Evaporator only |
| B. | Condenser only |
| C. | Both evaporator and condenser |
| D. | Heat exchanger |
| Answer» D. Heat exchanger | |
| 2. |
The kettle reboiler gives the flexibility to be used at _____________ pressure. |
| A. | Low |
| B. | Both low and high |
| C. | High |
| D. | Very High |
| Answer» C. High | |
| 3. |
The shell in Kettle reboiler is commonly known as _____________ |
| A. | TEMA K-Shell |
| B. | Shell and Tube Heat exchangers |
| C. | TENA L-shell |
| D. | ATEMA M-Shell |
| Answer» B. Shell and Tube Heat exchangers | |
| 4. |
The maximum vapor velocity uv(m/s) at the liquid surface should be less than which of the following value? |
| A. | 0.4\([\frac{ρ_L-ρ_v}{ρ_v}]^{1/2}\) |
| B. | 0.2\([\frac{ρ_L-ρ_v}{ρ_v}]^{1/2}\) |
| C. | 0.8\([\frac{ρ_L-ρ_v}{ρ_v}]^{1/2}\) |
| D. | 0.2\([\frac{ρ_L-ρ_v}{ρ_v}]^{1/8}\) |
| Answer» C. 0.8\([\frac{ρ_L-ρ_v}{ρ_v}]^{1/2}\) | |
| 5. |
The heat flux in kettle reboilers are _______ the forced convection reboilers. |
| A. | More than |
| B. | Less than |
| C. | Equal to |
| D. | Much less than |
| Answer» C. Equal to | |
| 6. |
In a kettle reboiler, the hot fluid is in the ______ and the solution is in the _______ |
| A. | Shell, Tube |
| B. | Tube, Shell |
| C. | Bed, Column |
| D. | Column, bed |
| Answer» C. Bed, Column | |
| 7. |
If the calculated hcal is greater than the maximum heat transfer co-efficient of say arbitrary value of 300 Btu/h.ft2℉ for organics and 1000 Btu/h.ft2℉ for water, then what should we do? |
| A. | Take hcal > 300 Btu/h.ft2℉ for organics and hcal < 1000 Btu/h.ft2 ℉ for water |
| B. | Take hcal= 300 Btu/h.ft2℉ for organics and hcal = 1000 Btu/h.ft2 ℉ for water |
| C. | Take hcal > 300 Btu/h.ft2℉ for organics and hcal > 1000 Btu/h.ft2 ℉ for water |
| D. | Take hcal > 300 Btu/h.ft2℉ for organics and hcal > 1000 Btu/h.ft2 ℉ for water |
| Answer» C. Take hcal > 300 Btu/h.ft2℉ for organics and hcal > 1000 Btu/h.ft2 ℉ for water | |
| 8. |
Kettle reboilers have low heat transfer rate than other types as there is high liquid circulation and hence appropriate for fouling fluids. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
The calculation of heat transfer coefficients in kettle type reboilers is similar to that of ______________ |
| A. | Double pipe heat exchanger |
| B. | Shell and Tube Heat exchangers |
| C. | Plate type heat exchanger |
| D. | Packed bed HE |
| Answer» C. Plate type heat exchanger | |
| 10. |
In the design of Kettle reboiler given by Kern for isothermal boiling, it is assumed that the degree of sub-cooling and super-heating of the cold fluid is ___________ |
| A. | Negligible |
| B. | Infinity |
| C. | 100 |
| D. | 10 |
| Answer» B. Infinity | |
| 11. |
Kettle reboiler is suitable for heat sensitive materials as it has low residence time. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Kettle type reboilers have _______ residence time. |
| A. | High |
| B. | Infinity |
| C. | Low |
| D. | Zero |
| Answer» B. Infinity | |
| 13. |
The vaporisation rate in a kettle reboiler can be reached as high as _________ of the feed. |
| A. | 80% |
| B. | 90% |
| C. | 70% |
| D. | 50% |
| Answer» B. 90% | |
| 14. |
Kettle reboiler is also called a ___________ reboiler. |
| A. | Thermosyphon |
| B. | Submerged bundle |
| C. | Internal |
| D. | Shell and tube |
| Answer» C. Internal | |
| 15. |
Which one of the following uses a similar type shell and tube heat exchanger with an oversized shell? |
| A. | Flash reboiler |
| B. | Kettle reboiler |
| C. | Vertical Thermosyphon |
| D. | Horizontal Thermosyphon |
| Answer» C. Vertical Thermosyphon | |