MCQOPTIONS
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MCQOPTIONS
This section includes 22 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the specific ratio for a blower? |
| A. | <1.1 |
| B. | 1.11-1.2 |
| C. | >1.2 |
| D. | 1.11 |
| Answer» C. >1.2 | |
| 2. |
Which type of blower is preferred for fluid bed reactor? |
| A. | Centrifugal blower |
| B. | Positive displacement blower |
| C. | Regenerative blower |
| D. | Helical screw blower |
| Answer» B. Positive displacement blower | |
| 3. |
When is high pressure required, which type of blower is preferred? |
| A. | Positive displacement blower |
| B. | Centrifugal blower |
| C. | Helical screw blower |
| D. | Regenerative blower |
| Answer» B. Centrifugal blower | |
| 4. |
Which technology’s principle is used in screw blowers? |
| A. | Air expander |
| B. | Air compressor |
| C. | Ventilators |
| D. | Vacuum creators |
| Answer» C. Ventilators | |
| 5. |
WHEN_IS_HIGH_PRESSURE_REQUIRED,_WHICH_TYPE_OF_BLOWER_IS_PREFERRED??$ |
| A. | Positive displacement blower |
| B. | Centrifugal blower |
| C. | Helical screw blower |
| D. | Regenerative blower |
| Answer» B. Centrifugal blower | |
| 6. |
What is the specific ratio for a blower?$ |
| A. | <1.1 |
| B. | 1.11-1.2 |
| C. | >1.2 |
| D. | 1.11 |
| Answer» C. >1.2 | |
| 7. |
Which type of blower is preferred for fluid bed reactor?$ |
| A. | Centrifugal blower |
| B. | Positive displacement blower |
| C. | Regenerative blower |
| D. | Helical screw blower |
| Answer» B. Positive displacement blower | |
| 8. |
Which of these is not a characteristic of variable speed drive? |
| A. | Improved speed control of the blower |
| B. | Speed adjustments over a continuous range |
| C. | High cost |
| D. | Can be retrofitted into an existing motor |
| Answer» E. | |
| 9. |
How is the static pressure drop in the water column related to the air flow rate? |
| A. | Linearly |
| B. | Inversely |
| C. | There is no relation between them |
| D. | A parabolic curve is obtained |
| Answer» B. Inversely | |
| 10. |
What is the maximum discharge pressure of a twin lobe blower? |
| A. | 0.5 kg/cm<sup>2</sup> |
| B. | 1 kg/cm<sup>2</sup> |
| C. | 1.5 kg/cm<sup>2</sup> |
| D. | 0.75 kg/cm<sup>2</sup> |
| Answer» C. 1.5 kg/cm<sup>2</sup> | |
| 11. |
Dimensionless pressure rise is not dependent on which of the following? |
| A. | Density of the fluid |
| B. | Speed of the blower |
| C. | Diameter of the blower |
| D. | Power of the blower |
| Answer» E. | |
| 12. |
Centrifugal pumps have a greater speed of rotation when compared to that of positive displacement blower. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Which blower is used when the system is prone to clogging? |
| A. | Centrifugal blower |
| B. | Positive displacement blower |
| C. | Regenerative blower |
| D. | Helical screw blower |
| Answer» C. Regenerative blower | |
| 14. |
Normally what is the pressure under which centrifugal blowers operate? |
| A. | 0.35-0.7 kg/cm<sup>2</sup> |
| B. | 0.5 -0.7 kg/cm<sup>2</sup> |
| C. | 0.35 kg/cm<sup>2</sup> |
| D. | 0.35-0.5kg/cm<sup>2</sup> |
| Answer» B. 0.5 -0.7 kg/cm<sup>2</sup> | |
| 15. |
Which blower among the following has the highest nominal efficiency? |
| A. | Positive displacement |
| B. | Single stage centrifugal |
| C. | Multi stage centrifugal (inlet throttled) |
| D. | Multi stage centrifugal (variable speed) |
| Answer» C. Multi stage centrifugal (inlet throttled) | |
| 16. |
Which technology’s principle is used in screw blowers?$ |
| A. | Air expander |
| B. | Air compressor |
| C. | Ventilators |
| D. | Vacuum creators |
| Answer» C. Ventilators | |
| 17. |
Air is used to ________ the filter bed. |
| A. | Compact |
| B. | Expand |
| C. | Aerate |
| D. | Fluidize |
| Answer» C. Aerate | |
| 18. |
The presence of DO is necessary for wastewater. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 19. |
What is the purpose of the blower? |
| A. | Decrease air flow |
| B. | Increase air flow |
| C. | Create vacuum |
| D. | Maintain air flow |
| Answer» C. Create vacuum | |
| 20. |
Proper air flow can help the bacteria remain suspended. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
Which of the following is created by blowers? |
| A. | Air flow |
| B. | Water flow |
| C. | Wastewater flow |
| D. | Vacuum flow |
| Answer» B. Water flow | |
| 22. |
Aeration energy consumes _______ of all electrical usage. |
| A. | 30% |
| B. | 40% |
| C. | 60% |
| D. | 80% |
| Answer» D. 80% | |