MCQOPTIONS
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MCQOPTIONS
This section includes 24 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 colour of ozone? |
| A. | Violet |
| B. | White |
| C. | Grey |
| D. | Colourless |
| Answer» E. | |
| 2. |
Which of the following is not correct regarding Ozonation? |
| A. | Does not requires chemicals |
| B. | Eliminates bad taste |
| C. | Eliminates odour |
| D. | Operational costs are low |
| Answer» E. | |
| 3. |
What is the average ozone concentration created during Ozonation? |
| A. | 1000 mg/l |
| B. | 5000 mg/l |
| C. | 10000 mg/l |
| D. | 15000 mg/l |
| Answer» D. 15000 mg/l | |
| 4. |
What is the maximum time required for ozone degradation? |
| A. | 15 minutes |
| B. | 30 minutes |
| C. | 45 minutes |
| D. | 60 minutes |
| Answer» C. 45 minutes | |
| 5. |
WHAT_IS_THE_MAXIMUM_TIME_REQUIRED_FOR_OZONE_DEGRADATION??$ |
| A. | 15 minutes |
| B. | 30 minutes |
| C. | 45 minutes |
| D. | 60 minutes |
| Answer» C. 45 minutes | |
| 6. |
Which of the following is not correct regarding Ozonation?$ |
| A. | Does not requires chemicals |
| B. | Eliminates bad taste |
| C. | Eliminates odour |
| D. | Operational costs are low |
| Answer» E. | |
| 7. |
What_is_the_average_ozone_concentration_created_during_Ozonation?$ |
| A. | 1000 mg/l |
| B. | 5000 mg/l |
| C. | 10000 mg/l |
| D. | 15000 mg/l |
| Answer» D. 15000 mg/l | |
| 8. |
In what range is the EE/O present in order to reduce one log of reduction? |
| A. | 0-20 KWH |
| B. | 20-265 KWH |
| C. | 265-365 KWH |
| D. | 365-650 KWH |
| Answer» C. 265-365 KWH | |
| 9. |
What are the byproducts of the breakdown of the organic compounds by UV rays? |
| A. | CO |
| B. | CO<sub>2</sub> + H<sub>2</sub>O |
| C. | H<sub>2</sub>CO<sub>3</sub> and water |
| D. | CO + H<sub>2</sub>O |
| Answer» C. H<sub>2</sub>CO<sub>3</sub> and water | |
| 10. |
How is the electrical requirement for the ozonation process expressed mathematically? |
| A. | EE/O =EE<sub>t</sub>/ Vlog(C<sub>i</sub>-C<sub>f</sub>) |
| B. | EE/O =EE<sub>t</sub>/ (C<sub>i</sub>-C<sub>f</sub>) |
| C. | EE/O =EE<sub>t</sub> Vlog(C<sub>i</sub>-C<sub>f</sub>) |
| D. | EE/O =EE<sub>t</sub>(C<sub>i</sub>-C<sub>f</sub>) |
| Answer» B. EE/O =EE<sub>t</sub>/ (C<sub>i</sub>-C<sub>f</sub>) | |
| 11. |
Photo catalysis uses which of the following methods to produce free radicals? |
| A. | UV rays |
| B. | UV + TiO<sub>2</sub> |
| C. | Ozone + UV |
| D. | TiO<sub>2</sub> |
| Answer» C. Ozone + UV | |
| 12. |
At what pH ozonation is carried out? |
| A. | 8 |
| B. | 9 |
| C. | 11 |
| D. | 7 |
| Answer» B. 9 | |
| 13. |
In which year was the ozone named? |
| A. | 1829 |
| B. | 1839 |
| C. | 1849 |
| D. | 1859 |
| Answer» C. 1849 | |
| 14. |
In which year was the structure of ozone determined? |
| A. | 1865 |
| B. | 1875 |
| C. | 1885 |
| D. | 1895 |
| Answer» B. 1875 | |
| 15. |
Ozone is formed by the interaction of _______ |
| A. | UV or O<sub>2</sub> |
| B. | O and O<sub>2</sub> |
| C. | O and UV |
| D. | O<sub>2</sub> and CO |
| Answer» B. O and O<sub>2</sub> | |
| 16. |
What_is_the_colour_of_ozone? |
| A. | Violet |
| B. | White |
| C. | Grey |
| D. | Colourless |
| Answer» E. | |
| 17. |
Which of the following is not removed by Ozonation? |
| A. | Iron |
| B. | Manganese |
| C. | Magnesium |
| D. | Bacteria |
| Answer» D. Bacteria | |
| 18. |
Which of the following is not a disadvantage of Ozonation? |
| A. | Chemicals |
| B. | Costs |
| C. | Energy |
| D. | Fire hazard |
| Answer» B. Costs | |
| 19. |
Which of these is not an advantage of Ozonation? |
| A. | Reaction with bacteria |
| B. | Organics degradation |
| C. | Equipment costs |
| D. | Chemicals |
| Answer» D. Chemicals | |
| 20. |
Ozone is an unstable gas. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
Which of the following can be inactivated using ozone? |
| A. | Algae |
| B. | Fungi |
| C. | Protozoa |
| D. | All microbes |
| Answer» D. All microbes | |
| 22. |
_______ is produced by subjecting oxygen to high electric voltage. |
| A. | Carbon-monoxide |
| B. | Carbon-dioxide |
| C. | Pure oxygen |
| D. | Ozone |
| Answer» E. | |
| 23. |
Ozone is one of the powerful oxidants. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 24. |
How many oxygen atoms are present in the ozone? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |