MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
What type of agitator is rotating disk agitator? |
| A. | Rotating agitator |
| B. | By moving plates |
| C. | By hands |
| D. | Gravity separation |
| Answer» B. By moving plates | |
| 2. |
WHAT_TYPE_OF_AGITATOR_IS_ROTATING_DISK_AGITATOR??$ |
| A. | Rotating agitator |
| B. | By moving plates |
| C. | By hands |
| D. | Gravity separation |
| Answer» B. By moving plates | |
| 3. |
How agitation is achieved in the scheibel column? |
| A. | Liquid phases are contacted in fixed intervals by unbafled, flat bladed, turbine type agitators |
| B. | By moving plates |
| C. | By hands |
| D. | Gravity separation |
| Answer» B. By moving plates | |
| 4. |
How is agitation not induced in columns? |
| A. | Oscillating pulse to liquid |
| B. | Rotating agitators |
| C. | By moving plates back and forth |
| D. | By using mixers |
| Answer» E. | |
| 5. |
Why are the extraction rates in sieve plate columns high? |
| A. | Because the dispersed droplets coalesce and reform on each plate |
| B. | Because the dispersed droplets don’t coalesce and reform on each plate |
| C. | Because the dispersed droplets coalesce and not reform on each plate |
| D. | Because the dispersed droplets neither coalesce nor reform on each plate |
| Answer» B. Because the dispersed droplets don‚Äö√Ñ√∂‚àö√ë‚àö¬•t coalesce and reform on each plate | |
| 6. |
What is the use of plate columns? |
| A. | Increases axial mixing |
| B. | Reduces axial mixing by packing columns |
| C. | Reduces axial mixing and promotes a stage-wise type of contact |
| D. | Reduces the cost |
| Answer» D. Reduces the cost | |
| 7. |
Why is HETP larger than for staged devices? |
| A. | To avoid overflow |
| B. | To avoid back-mixing |
| C. | To avoid the cost increment |
| D. | To get full efficiency |
| Answer» C. To avoid the cost increment | |
| 8. |
How does packing the column help? |
| A. | Lessens the mass transfer |
| B. | Increases the mass transfer by not breaking the large drops |
| C. | Decreases the interfacial area |
| D. | Increases the mass transfer by breaking the large droplets thus increasing interfacial area |
| Answer» E. | |
| 9. |
Why are spray columns rarely used? |
| A. | High cost |
| B. | High efficiency |
| C. | More size of equipment required |
| D. | Due to axial dispersion |
| Answer» E. | |
| 10. |
Which is the simple and the oldest technique for solvent extraction? |
| A. | Spray column |
| B. | Packed column |
| C. | Plate column |
| D. | Decanter |
| Answer» B. Packed column | |