MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Separation Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How does the heat transfer occurs in the indirect-heat continuous dryers? |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Circulation |
| Answer» B. Convection | |
| 2. |
Which dryer is used for drying powders and dyes? |
| A. | Jacketed-shelf dryer |
| B. | Agitated pan dryers |
| C. | Conical vacuum dryer |
| D. | Indirect heat continuous dryer |
| Answer» D. Indirect heat continuous dryer | |
| 3. |
Which dryer is suitable for heat sensitive materials? |
| A. | Jacketed-shelf dryer |
| B. | Agitated pan dryers |
| C. | Conical vacuum dryer |
| D. | Indirect heat continuous dryer |
| Answer» B. Agitated pan dryers | |
| 4. |
What is the heat efficiency of a rotary dryer? |
| A. | 10% |
| B. | 20%-30% |
| C. | 40%-50% |
| D. | 20%-80% |
| Answer» E. | |
| 5. |
Why is a low flow rate of air maintained in a rotary dryer? |
| A. | To carry forward the crystals |
| B. | To increase the speed of crystallization |
| C. | To evaporate the water |
| D. | To carry away the evaporated water |
| Answer» E. | |
| 6. |
Which are the most used dryers in chemical industry? |
| A. | Tunnel dryers |
| B. | Truck dryers |
| C. | Rotary dryers |
| D. | Belt dryers |
| Answer» D. Belt dryers | |
| 7. |
For what solids is belt dryer used? |
| A. | Coarse |
| B. | Smooth |
| C. | Wet |
| D. | Dry |
| Answer» B. Smooth | |
| 8. |
What leads to uneven drying in belt or conveyer dryer? |
| A. | Change in speed of belt |
| B. | High speed of belt |
| C. | Maldistribution of air |
| D. | High moisture retaining solids |
| Answer» D. High moisture retaining solids | |
| 9. |
What is the drying time in the tunnel truck dryer? |
| A. | The time taken by each tunnel |
| B. | The time taken by each truck |
| C. | The sum of all time taken by all tunnels |
| D. | The sum of all time taken by all the trucks |
| Answer» E. | |
| 10. |
In which industry are tunnel truck dryers mostly used? |
| A. | Pharma industry |
| B. | Textile industry |
| C. | Ceramic industry |
| D. | Chemical industry |
| Answer» D. Chemical industry | |
| 11. |
WHICH_DRYER_USED_RADIATION_FOR_DRYING??$ |
| A. | Spray dryer |
| B. | Drum dryer |
| C. | Flash dryer |
| D. | Microwave dryer |
| Answer» E. | |
| 12. |
What is the use of a high pressure nozzle or a whirling disk in a spray dryer? |
| A. | Increasing contact time |
| B. | Decreasing contact time |
| C. | Agitation |
| D. | Atomization |
| Answer» E. | |
| 13. |
With what is the feed introduced in the spary dryer? |
| A. | Spray |
| B. | Atomizer |
| C. | Nucleator |
| D. | Heat exchanger |
| Answer» C. Nucleator | |
| 14. |
Heat sensitive or easily oxidizable materials are dried by: |
| A. | Flash dryer |
| B. | Drum dryer |
| C. | Fluidized bed dryer |
| D. | Rotary dryer |
| Answer» B. Drum dryer | |
| 15. |
How the liquid does gets separated in freeze dryer? |
| A. | Boiling |
| B. | Distillation |
| C. | Freezing and crystallization |
| D. | Evaporation |
| Answer» D. Evaporation | |
| 16. |
Which materials are not used in drying in a freeze dryer? |
| A. | Seafood |
| B. | Fruits |
| C. | Pharmaceuticals |
| D. | Dyes |
| Answer» E. | |
| 17. |
What is the drum dryer called if it is open to the atmosphere? |
| A. | Open dryer |
| B. | Box dryer |
| C. | Trough dryer |
| D. | Trench dryer |
| Answer» D. Trench dryer | |
| 18. |
How is heating achieved in drum dryers? |
| A. | By heating the drums |
| B. | By conduction |
| C. | By passing steam through hollow screws |
| D. | By passing steam through the conveyer belt |
| Answer» D. By passing steam through the conveyer belt | |
| 19. |
When are drum dryers used? |
| A. | When the material is too thick for spray dryer and too thin for rotary dryer |
| B. | When the material is too thick for rotary dryer and too thin for spray dryer |
| C. | When the material is not biodegradable |
| D. | When large crystal size is to be obtained |
| Answer» B. When the material is too thick for rotary dryer and too thin for spray dryer | |
| 20. |
Why direct heating by hot air cannot be done in some cases? |
| A. | The material can degrade |
| B. | High temperature not required |
| C. | Low temperature not required |
| D. | Conduction gives best results |
| Answer» B. High temperature not required | |