MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The minimum weir loading rate of primary clarifier is ____m3/m/day. |
| A. | 125000 |
| B. | 50000 |
| C. | 10000 |
| D. | 20000 |
| Answer» B. 50000 | |
| 2. |
The detention period of a secondary clarifier is ___________ |
| A. | 30 minutes |
| B. | 1 hour |
| C. | 2 hours |
| D. | 4 hours |
| Answer» D. 4 hours | |
| 3. |
The surface loading rate of a secondary clarifier is ______ litres/m2/day. |
| A. | 1000 |
| B. | 10000 |
| C. | 20000 |
| D. | 40000 |
| Answer» E. | |
| 4. |
Recirculation increases the efficiency of high rate trickling filters. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
The size of filter media in a high rate trickling filter is ___________ |
| A. | 10-20mm |
| B. | 34-68mm |
| C. | 25-60mm |
| D. | 20-50mm |
| Answer» D. 20-50mm | |
| 6. |
The expression of the recirculation factor F is given by ___________ |
| A. | F = 1 / (1+0.1 (R/I))<sup>2</sup> |
| B. | F = (1+ R) / (1+0.1 (R/I))<sup>2</sup> |
| C. | F = (1+ I/R) / (1+0.1(R/I))<sup>2</sup> |
| D. | F = (1+ R/I) / (1+0.1(R/I))<sup>2</sup> |
| Answer» E. | |
| 7. |
The range of organic loading in kg/hectare metre/ day in a high rate trickling filter is ___________ |
| A. | 6000-18000 |
| B. | 10000-20000 |
| C. | 5000-10000 |
| D. | 900-2200 |
| Answer» B. 10000-20000 | |
| 8. |
The color of the secondary sludge produced from the high rate trickling filter is ___________ |
| A. | Gray |
| B. | Black |
| C. | Brown |
| D. | Green |
| Answer» D. Green | |
| 9. |
The maximum removal of suspended and dissolved impurities from the sewage is? |
| A. | 65 |
| B. | 70 |
| C. | 92 |
| D. | 99 |
| Answer» D. 99 | |