MCQOPTIONS
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MCQOPTIONS
This section includes 21 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 minimum number of electrodes required for the process? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 2. |
The cathode material corrodes during the process. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Electro-coagulation process removes bacteria. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
What is the minimum feed flow rate for industrial applications of WAO? |
| A. | 1 m3/h |
| B. | 5 m3/h |
| C. | 10 m3/h |
| D. | 50 m3/h |
| Answer» B. 5 m3/h | |
| 5. |
The oxidation process occurs above 374˚C. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
WHAT_IS_THE_MINIMUM_FEED_FLOW_RATE_FOR_INDUSTRIAL_APPLICATIONS_OF_WAO??$ |
| A. | 1 m<sup>3</sup>/h |
| B. | 5 m<sup>3</sup>/h |
| C. | 10 m<sup>3</sup>/h |
| D. | 50 m<sup>3</sup>/h |
| Answer» B. 5 m<sup>3</sup>/h | |
| 7. |
The cathode material corrodes during the process.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Electro-coagulation_process_removes_bacteria.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
What is the common method used for mixing of wastewater in electrocoagulation process? |
| A. | Mechanical mixing |
| B. | Natural mixing |
| C. | Electrical stirrer |
| D. | Magnetic bar stirrer |
| Answer» E. | |
| 10. |
_________ results from the oxygen and hydrogen ions that bond into the water receptor sites of emulsified oil molecules. |
| A. | Seeding |
| B. | Emulsion breaking |
| C. | Bleaching |
| D. | Complexing |
| Answer» C. Bleaching | |
| 11. |
The conductive metal plates are placed in ________ |
| A. | Parallel |
| B. | Perpendicular |
| C. | Either parallel or perpendicular |
| D. | Neither parallel or perpendicular |
| Answer» B. Perpendicular | |
| 12. |
Which among the following corrodes due to oxidation? |
| A. | Anode |
| B. | Cathode |
| C. | Anode and cathode |
| D. | Only cathode |
| Answer» B. Cathode | |
| 13. |
What_is_the_minimum_number_of_electrodes_required_for_the_process? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 14. |
What is the maximum pressure below which oxidation reactions occur? |
| A. | 110 bar |
| B. | 150 bar |
| C. | 220 bar |
| D. | 250 bar |
| Answer» D. 250 bar | |
| 15. |
What is the percentage of dry solid slurry that can be processed in a WAO system? |
| A. | 1% |
| B. | 2% |
| C. | 3% |
| D. | 4% |
| Answer» E. | |
| 16. |
What is the minimum temperature required for WAO? |
| A. | 30ÀöC |
| B. | 50ÀöC |
| C. | 90ÀöC |
| D. | 150ÀöC |
| Answer» E. | |
| 17. |
Which form of oxygen is used in the process of wet air oxidation? |
| A. | Molecular oxygen |
| B. | Dissolved oxygen |
| C. | Pure oxygen |
| D. | Atomic oxygen |
| Answer» C. Pure oxygen | |
| 18. |
The heat released during the oxidation is_______ |
| A. | Released into the atmosphere |
| B. | Cooled using cooling systems |
| C. | Used to maintain an operating temperature |
| D. | Used as energy to boil water |
| Answer» D. Used as energy to boil water | |
| 19. |
In a bubble column reactor, fresh water enters from the _________of the column. |
| A. | Bottom |
| B. | Top |
| C. | Side |
| D. | Top and side |
| Answer» B. Top | |
| 20. |
The oxidation process occurs above 374ÀöC.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
Wet air oxidation is a form of hydrothermal treatment. |
| A. | True |
| B. | False |
| Answer» B. False | |