MCQOPTIONS
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MCQOPTIONS
This section includes 21 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, ω, in radians per second? |
| A. | 3888.8 rad s-1 |
| B. | 5680.8 rad s-1 |
| C. | 4188.8 rad s-1 |
| D. | 4288.8 rad s-1 |
| Answer» D. 4288.8 rad s-1 | |
| 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 × 10-7 cm s-2 |
| B. | 5.4 × 10-7 cm s-2 |
| C. | 3.4 × 10-7 cm s-2 |
| D. | 6.5 × 10-7 cm s-2 |
| Answer» B. 5.4 × 10-7 cm s-2 | |
| 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 ρ = kg m3 ρ = 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 μm |
| B. | 2.66 μm |
| C. | 3.15 μm |
| D. | 2.57 μm |
| 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 | |
| 9. |
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 | |
| 10. |
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 √ó 10-7 cm s<sup>-2</sup> |
| B. | 5.4 √ó 10-7 cm s<sup>-2</sup> |
| C. | 3.4 √ó 10-7 cm s<sup>-2</sup> |
| D. | 6.5 √ó 10-7 cm s<sup>-2</sup> |
| Answer» B. 5.4 ‚Äö√†√∂‚àö‚â• 10-7 cm s<sup>-2</sup> | |
| 11. |
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 | |
| 12. |
What is a 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. | |
| 13. |
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, ω, 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> | |
| 14. |
Which of the following is used as a media for density gradient? |
| A. | Agarose |
| B. | Ficoll |
| C. | Luria broth |
| D. | Propylene glycol |
| Answer» C. Luria broth | |
| 15. |
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 ρ = kg m 3 ρ = 850 / kg m 2r 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 μm |
| B. | 2.66 μm |
| C. | 3.15 μm |
| D. | 2.57 μm |
| Answer» E. | |
| 16. |
Which of the following centrifugation is used to separate certain organelles from whole cell? |
| A. | Rate-zonal centrifugation |
| B. | Normal centrifugation |
| C. | Differential centrifugation |
| D. | Isopycnic centrifugation |
| Answer» D. Isopycnic centrifugation | |
| 17. |
At what speed do you centrifuge blood? |
| A. | 2200-2500 RPM |
| B. | 3000-3200 RPM |
| C. | 1000-1500 RPM |
| D. | 4000 RPM |
| Answer» B. 3000-3200 RPM | |
| 18. |
By increasing the feed rate of the liquid in tubular centrifuge the performance is increased? |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Which of the following is not a type of centrifugation? |
| A. | Hydro cyclone |
| B. | Tubular centrifuge |
| C. | Microfiltration |
| D. | Disk stack separator |
| Answer» D. Disk stack separator | |
| 20. |
In 500 √ó 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 | |
| 21. |
The centrifugation is based on the principle of when a force is less than the gravity desired. |
| A. | |
| B. | True |
| Answer» C. | |