MCQOPTIONS
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MCQOPTIONS
This section includes 18 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 solid retention time assumed when the sludge constituting biosolids is treated anaerobically? |
| A. | 7 days |
| B. | 4 days |
| C. | 15 days |
| D. | 10 days |
| Answer» D. 10 days | |
| 2. |
At what temperature the sludge constituting biosolids is heated, when it is treated by the pasteurization method? |
| A. | 45 degree Celsius |
| B. | 55 degree Celsius |
| C. | 70 degree Celsius |
| D. | 65 degree Celsius |
| Answer» D. 65 degree Celsius | |
| 3. |
To what temperature is a sludge constituting liquid biosolids heated in order to treat it? |
| A. | 450 degree Celsius |
| B. | 200 degree Celsius |
| C. | 180 degree Celsius |
| D. | 300 degree Celsius |
| Answer» D. 300 degree Celsius | |
| 4. |
TO_WHAT_TEMPERATURE_IS_A_SLUDGE_CONSTITUTING_LIQUID_BIOSOLIDS_HEATED_IN_ORDER_TO_TREAT_IT??$ |
| A. | 450 degree Celsius |
| B. | 200 degree Celsius |
| C. | 180 degree Celsius |
| D. | 300 degree Celsius |
| Answer» D. 300 degree Celsius | |
| 5. |
What is the solid retention time assumed when the sludge constituting biosolids is treated anaerobically?$ |
| A. | 7 days |
| B. | 4 days |
| C. | 15 days |
| D. | 10 days |
| Answer» D. 10 days | |
| 6. |
At what temperature the sludge constituting biosolids is heated, when it is treated by the pasteurization method?$ |
| A. | 45 degree Celsius |
| B. | 55 degree Celsius |
| C. | 70 degree Celsius |
| D. | 65 degree Celsius |
| Answer» D. 65 degree Celsius | |
| 7. |
Which type of pump is preferred to remove trickling filter humus? |
| A. | Submersible cutter pump |
| B. | Non-clog pump |
| C. | Vertical turbine pumps |
| D. | Diaphragm pump |
| Answer» E. | |
| 8. |
For removing the digested biosolids which type of pump is preferred? |
| A. | Submersible |
| B. | Non-clog pumps |
| C. | Vertical turbine pump |
| D. | Plunger pump |
| Answer» E. | |
| 9. |
For a return activated sludge pump what is the type of pump preferred? |
| A. | Plunger |
| B. | Peristaltic pump |
| C. | Submersible |
| D. | Non-clog |
| Answer» E. | |
| 10. |
Which of the following methods is used in both dewatering and thickening? |
| A. | Filter press |
| B. | Centrifuge |
| C. | Gravity belt |
| D. | Rotary drum |
| Answer» C. Gravity belt | |
| 11. |
What is the final water content of sludge after dewatering? |
| A. | 5% |
| B. | 2% |
| C. | 10% |
| D. | 1% |
| Answer» D. 1% | |
| 12. |
For how many days the sludge constituting biosolids is subjected to composting? |
| A. | 1 day |
| B. | 2 days |
| C. | 3 days |
| D. | 5 days |
| Answer» D. 5 days | |
| 13. |
What is the temperature at which sludge constituting biosolids are composted? |
| A. | 55 degree Celsius |
| B. | 45 degree Celsius |
| C. | 65 degree Celsius |
| D. | 75 degree Celsius |
| Answer» B. 45 degree Celsius | |
| 14. |
What is autotrophic biomass made up of? |
| A. | Inert particulate matter |
| B. | Endogenous residue |
| C. | Biodegradable particle |
| D. | Nitrifying bacteria |
| Answer» E. | |
| 15. |
________ is oxidized by heterotypic micro-organisms. |
| A. | Inorganic matter |
| B. | Inert materials |
| C. | Organic matter |
| D. | Water |
| Answer» D. Water | |
| 16. |
Gravity thickening can achieve up to _____ solid fraction. |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» C. 15% | |
| 17. |
The measure of pH is the ______ ion concentration. |
| A. | Iron |
| B. | Hydrogen |
| C. | Aluminium |
| D. | Sodium |
| Answer» C. Aluminium | |
| 18. |
The Activated Sludge Process is a _______ wastewater treatment process. |
| A. | Physical |
| B. | Chemical |
| C. | Biological |
| D. | Biochemical |
| Answer» D. Biochemical | |