MCQOPTIONS
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MCQOPTIONS
This section includes 16 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 diameter of a sand filter with the following data.Flow: 2200 m3/hrVelocity: 12 m/hr |
| A. | 15.3 m |
| B. | 15.5 m |
| C. | 16.3 m |
| D. | 16.5 m |
| Answer» B. 15.5 m | |
| 2. |
While designing a multimedia filter what is the velocity that is assumed? |
| A. | 10-12 m/h |
| B. | 15-18 m/h |
| C. | 18-20 m/h |
| D. | 30 m/h |
| Answer» D. 30 m/h | |
| 3. |
While designing a dual media filter what is the velocity that is assumed? |
| A. | 10-12 m/h |
| B. | 15-18 m/h |
| C. | 20 m/h |
| D. | 30 m/h |
| Answer» C. 20 m/h | |
| 4. |
While designing a sand filter what is the velocity that is assumed? |
| A. | 10-12 m/h |
| B. | 15 m/h |
| C. | 20 m/h |
| D. | 30 m/h |
| Answer» B. 15 m/h | |
| 5. |
What is the TSS at the outlet of the Pressure Sand Filter (PSF)? |
| A. | <10 ppm |
| B. | 25 ppm |
| C. | 100 ppm |
| D. | >150 ppm |
| Answer» B. 25 ppm | |
| 6. |
What does sand filter remove? |
| A. | TDS |
| B. | TSS |
| C. | BOD |
| D. | COD |
| Answer» C. BOD | |
| 7. |
What is the depth of washing during high-rate water backwash? |
| A. | 3-4 mm |
| B. | 3-6 mm |
| C. | 2-3 mm |
| D. | 1-2 mm |
| Answer» C. 2-3 mm | |
| 8. |
What is the air scour rate which is provided before a water backwash? |
| A. | 12 cum/ sqm h |
| B. | 15 cum/ sqm h |
| C. | 20 cum/ sqm h |
| D. | 27 cum/ sqm h |
| Answer» E. | |
| 9. |
Even by high-rate of backwash, efficiency of cleaning is poor. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
What is the porosity range during expansion of the filter bed? |
| A. | 0.4-0.5 |
| B. | 0.5-0.6 |
| C. | 0.1-0.2 |
| D. | 0.68-0.7 |
| Answer» E. | |
| 11. |
What is the surface wash rate? |
| A. | 5-6 cum/sqm h |
| B. | 6-7 cum/sqm h |
| C. | 8-10 cum/sqm h |
| D. | 10-12 cum/sqm h |
| Answer» E. | |
| 12. |
What is the head loss found in a rapid sand filter? |
| A. | <3 |
| B. | >3 |
| C. | 0 |
| D. | <4 |
| Answer» C. 0 | |
| 13. |
What is the effective size of sand used in rapid sand filters? |
| A. | 0.2-0.3 mm |
| B. | 0.3-0.6 mm |
| C. | 0.6-1.2 mm |
| D. | 12-2.4 mm |
| Answer» D. 12-2.4 mm | |
| 14. |
What is the percentage of bacterial removal in filter beds? |
| A. | 60-70 % |
| B. | 75-80 % |
| C. | 80-90 % |
| D. | 90-99 % |
| Answer» E. | |
| 15. |
Pre-treatment of beds is not necessary. |
| A. | True |
| B. | False |
| Answer» C. | |
| 16. |
What is the size of the small rapid sand filter bed? |
| A. | 50 sqm |
| B. | 80 sqm |
| C. | 100 sqm |
| D. | 120 sqm |
| Answer» D. 120 sqm | |