MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
In dense phase flow, the bed is ______ |
| A. | Moving as a block |
| B. | Totally fluidised |
| C. | Fixed bed |
| D. | Stationary fluidized bed |
| Answer» B. Totally fluidised | |
| 2. |
In Fluidised bed the particle size are___________ |
| A. | Usually Equal |
| B. | Necessarily equal |
| C. | Range of varying sizes |
| D. | Identical |
| Answer» B. Necessarily equal | |
| 3. |
Which one of the following is not a functioning model of fluidised bed? |
| A. | Fixed bed |
| B. | Stationary fluidized bed |
| C. | Fluidized bed with particle feeding at the bottom and overflow at the free surface of the bed |
| D. | Packed with fluid sliding on top |
| Answer» E. | |
| 4. |
Fluidised beds are always used in a vertical arrangement. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
At minimum fluidisation with gas flow, which one of the following is correct? |
| A. | All the particles are in fluidisation with random movement |
| B. | The particles at the top of the bed are floating in random movement |
| C. | The particles are stable and not moving |
| D. | Half or partial quantity of the solids are in random movement |
| Answer» E. | |
| 6. |
At minimum fluidisation flow rate, the gas flow velocity is also known as __________ of the pellets. |
| A. | Superficial velocity |
| B. | Terminal velocity |
| C. | Average velocity |
| D. | Transport velocity |
| Answer» C. Average velocity | |
| 7. |
The substance used as bed in fluidised bed reactors is also known as _________ |
| A. | Particulate Solid material |
| B. | Distributed Solid material |
| C. | Packed Solid material |
| D. | Segregated Solid material |
| Answer» B. Distributed Solid material | |
| 8. |
The fluidised bed reactor is a ______ reactor. |
| A. | Single phase |
| B. | Two phase |
| C. | Three phase |
| D. | Gas phase |
| Answer» C. Three phase | |
| 9. |
Coal combustion cannot be performed with fluidised bed as it would damage the walls. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
The thermal conductivity of the bed on complete fluidisation is________ |
| A. | Infinity |
| B. | Zero |
| C. | In the range 0-100 |
| D. | In the range 10-120 |
| Answer» B. Zero | |
| 11. |
At fluidisation, the temperature of the bed is _______ |
| A. | Constant but non-uniform |
| B. | Same for fluid and particles |
| C. | Non uniform |
| D. | Increasing from the bottom |
| Answer» C. Non uniform | |
| 12. |
The pressure drop in fluidised bed on fluidisation __________ with increasing flow rate. |
| A. | Remains same |
| B. | Linearly increases |
| C. | Linearly decreases |
| D. | Remains zero |
| Answer» B. Linearly increases | |
| 13. |
At fluidisation, the upward drag force is _________ the weight of the particles. |
| A. | Equal to |
| B. | Slightly higher than |
| C. | Less than |
| D. | Negligible to |
| Answer» C. Less than | |
| 14. |
The substance used in fluidised bed is _______ |
| A. | Same as Packed Bed |
| B. | Powdered Substance |
| C. | Large balls |
| D. | Finely divided Solid material |
| Answer» E. | |