MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Bioprocess Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is rate-zonal centrifugation? |
| A. | Based on separation of particles by mass |
| B. | Based on separation of particles by density |
| C. | Based on separation of particles on solubility |
| D. | Based on separation of particles on size |
| Answer» E. | |
| 2. |
For the pelleting of the microsomal fraction from a liver homogenate, an ultracentrifuge is operated at a speed of 40000 rpm. What is the angular velocity, , in radians per second? |
| A. | 3888.8 rad s<sup>-1</sup> |
| B. | 5680.8 rad s<sup>-1</sup> |
| C. | 4188.8 rad s<sup>-1</sup> |
| D. | 4288.8 rad s<sup>-1</sup> |
| Answer» D. 4288.8 rad s<sup>-1</sup> | |
| 3. |
What is the applied centrifugal field at a point equivalent to 5 cm from the centre of rotation and an angular velocity of 3000 rad s-1? |
| A. | 4.5 10<sup>-7</sup> cm s<sup>-2</sup> |
| B. | 5.4 10<sup>-7</sup> cm s<sup>-2</sup> |
| C. | 3.4 10<sup>-7</sup> cm s<sup>-2</sup> |
| D. | 6.5 10<sup>-7</sup> cm s<sup>-2</sup> |
| Answer» B. 5.4 10<sup>-7</sup> cm s<sup>-2</sup> | |
| 4. |
Which of the following is used in uranium enrichment? |
| A. | Tubular centrifuge |
| B. | Disk-stack centrifuge |
| C. | Gas centrifuge |
| D. | Zippe-type centrifuge |
| Answer» D. Zippe-type centrifuge | |
| 5. |
From the following which is the type of filtration centrifuge? |
| A. | Screen/scroll centrifuge |
| B. | Tubular centrifuge |
| C. | Decanter centrifuge |
| D. | Separator centrifuge |
| Answer» B. Tubular centrifuge | |
| 6. |
A viscous solution contains particles with a density is to be clarified by centrifugation. The solution density is and its viscosity is 80 cp. The centrifuge has a bowl with and 3 1200 / p = kg m3 = 850 / kg m2r m = 0.02 1 r = 0.01 m and height b=0.25 m. Calculate the critical particle diameter of the largest particles in the exit stream if N=15000 rpm and flow rate q=0.002 m3 /hr? |
| A. | 2.9 m |
| B. | 2.66 m |
| C. | 3.15 m |
| D. | 2.57 m |
| Answer» E. | |
| 7. |
By increasing the feed rate of the liquid in tubular centrifuge the performance is increased. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
In 500 g, what does g represent in accordance to centrifugation? |
| A. | Gravitational force |
| B. | Centrifugal force is 500 times greater than earthly gravitational force |
| C. | Centrifugal force is 500 times less than earthly gravitational force |
| D. | Centrifugal force is 500 times same as that of earthly gravitational force |
| Answer» C. Centrifugal force is 500 times less than earthly gravitational force | |