MCQOPTIONS
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MCQOPTIONS
This section includes 29 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. |
Calculate the amount of air required for the equalization tank with the following detailsFlow: 500 m3/hBOD load: 800 mg/L |
| A. | 950 m3/hr |
| B. | 800 m3/hr |
| C. | 2000 m3/hr |
| D. | 785 m3/hr |
| Answer» D. 785 m3/hr | |
| 2. |
Calculate the number of fine diffusers required for the following data.Flow: 300 m3/hBOD load: 1000 mg/L |
| A. | 150 |
| B. | 146 |
| C. | 170 |
| D. | 186 |
| Answer» C. 170 | |
| 3. |
Calculate the number of diffusers for the following.Blower Flow rate: 535 m3/hrCoarse diffusers are used. |
| A. | 54 |
| B. | 60 |
| C. | 65 |
| D. | 70 |
| Answer» B. 60 | |
| 4. |
Calculate the amount of air required for the following details.Flow: 300 m3/hBOD load: 800 mg/L |
| A. | 550 m3/hr |
| B. | 518 m3/hr |
| C. | 700m3/hr |
| D. | 618 m3/hr |
| Answer» D. 618 m3/hr | |
| 5. |
Calculate the theoretical oxygen requirement for the following details.Flow: 200 m3/hBOD load: 800 mg/L |
| A. | 45.5 Kg/h of O2/hr |
| B. | 23.05 Kg/h of O2/hr |
| C. | 25.05 Kg/h of O2/hr |
| D. | 50.5 Kg/h of O2/hr |
| Answer» C. 25.05 Kg/h of O2/hr | |
| 6. |
What is the value for α for mechanical aeration aeration for the following equation.α= KLA(wastewater) /KLA(Tap water) |
| A. | 0.6-1.2 |
| B. | 0.2-0.3 |
| C. | 0.3-0.5 |
| D. | >1.2 |
| Answer» B. 0.2-0.3 | |
| 7. |
What is the value for α for diffused aeration for the following equation.α= KLA(wastewater) /KLA(Tap water) |
| A. | 0.4-0.8 |
| B. | 0.2-0.3 |
| C. | 0.8-1 |
| D. | >1 |
| Answer» B. 0.2-0.3 | |
| 8. |
What is the value for Ɵ for mechanical and diffused aeration for the following equation?KLA(T) = KLA(20 Degree Celsius)ƟT-20 |
| A. | 1.015 |
| B. | 1.1 |
| C. | 1.024 |
| D. | 1.04 |
| Answer» D. 1.04 | |
| 9. |
How many types of aerators are present? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 10. |
Which of the following is not used for iron removal? |
| A. | Oxidation |
| B. | Reduction |
| C. | Gasification |
| D. | Absorption |
| Answer» C. Gasification | |
| 11. |
H2S is highly soluble in water. |
| A. | Tue |
| B. | False |
| Answer» B. False | |
| 12. |
High solubility of CO2 ______ pH. |
| A. | Maintains |
| B. | Reduces |
| C. | Increases |
| D. | Nullifies |
| Answer» C. Increases | |
| 13. |
What does OTR stand for? |
| A. | Oxygen transfer rate in standard conditions |
| B. | Oxygen transfer rate in clean water |
| C. | Oxygen transfer efficiency in clean water |
| D. | Oxygen transfer efficiency in standard conditions in the clean water |
| Answer» C. Oxygen transfer efficiency in clean water | |
| 14. |
WHICH_OF_THE_FOLLOWING_IS_NOT_USED_FOR_IRON_REMOVAL??$ |
| A. | Oxidation |
| B. | Reduction |
| C. | Gasification |
| D. | Absorption |
| Answer» C. Gasification | |
| 15. |
What is the value for Ɵ for mechanical and diffused aeration for the following equation?$# |
| A. | </sub> = K<sub>LA(20 Degree Celsius)</sub>Ɵ<sup>T-20</sup> |
| B. | 1.015 |
| C. | 1.1 |
| D. | 1.024 |
| Answer» D. 1.024 | |
| 16. |
How_many_types_of_aerators_are_present?$ |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 17. |
Calculate the number of fine diffusers required for the following data. |
| A. | |
| B. | |
| Answer» C. | |
| 18. |
Calculate the number of diffusers for the following. |
| A. | |
| B. | |
| Answer» B. | |
| 19. |
Calculate the theoretical oxygen requirement for the following details. |
| A. | |
| B. | |
| Answer» C. | |
| 20. |
What is the value for α for mechanical aeration aeration for the following equation.$ |
| A. | </sub> /K<sub>LA(Tap water)</sub> |
| B. | 0.6-1.2 |
| C. | 0.2-0.3 |
| D. | 0.3-0.5 |
| Answer» B. 0.6-1.2 | |
| 21. |
What is the value for α for diffused aeration for the following equation.$ |
| A. | </sub> /K<sub>LA(Tap water)</sub> |
| B. | 0.4-0.8 |
| C. | 0.2-0.3 |
| D. | 0.8-1 |
| Answer» B. 0.4-0.8 | |
| 22. |
H2S is highly soluble in water? |
| A. | Tue |
| B. | False |
| Answer» B. False | |
| 23. |
What is the range of pH above which aeration is required? |
| A. | 2 mg/L |
| B. | 5 mg/L |
| C. | 8 mg/L |
| D. | 10 mg/L |
| Answer» E. | |
| 24. |
High solubility of CO2 ______ pH. |
| A. | Maintains |
| B. | Reduces |
| C. | Increases |
| D. | Nullifies |
| Answer» C. Increases | |
| 25. |
_________ is the actual mass of oxygen transferred per unit time. |
| A. | OTR |
| B. | SOTR |
| C. | OTE |
| D. | SOTE |
| Answer» B. SOTR | |
| 26. |
What is the symbol used to define the ratio of the process to clean water mass transfer? |
| A. | Alpha |
| B. | Beta |
| C. | Gamma |
| D. | Sigma |
| Answer» B. Beta | |
| 27. |
Which of the following is not a standard condition for aeration? |
| A. | 40ÀöC |
| B. | 1 atm |
| C. | Zero salinity |
| D. | Zero DO |
| Answer» B. 1 atm | |
| 28. |
What is the full form of OTR in Diffused Mechanical Aeration Systems? |
| A. | Oxygen transfer rate in standard conditions |
| B. | Oxygen transfer rate in clean water |
| C. | Oxygen transfer efficiency in clean water |
| D. | Oxygen transfer efficiency in standard conditions in the clean water |
| Answer» C. Oxygen transfer efficiency in clean water | |
| 29. |
Aeration consumes less energy in activated sludge process compared to other processes. |
| A. | True |
| B. | False |
| Answer» C. | |