MCQOPTIONS
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MCQOPTIONS
This section includes 6 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 range of temperature at which mesophilic microorganism becomes active in sludge digester is ___________ |
| A. | 30-40<sup>o</sup>C |
| B. | 10-40<sup>o</sup>C |
| C. | 20-50<sup>o</sup>C |
| D. | 20-40<sup>o</sup>C |
| Answer» E. | |
| 2. |
The minimum size of sludge digestion tank is ___________ |
| A. | 0.5m |
| B. | 1m |
| C. | 2m |
| D. | 3m |
| Answer» E. | |
| 3. |
The maximum temperature at which thermophilic microorganisms remain active in sludge digester is ___________ |
| A. | 60<sup>o</sup>C |
| B. | 40<sup>o</sup>C |
| C. | 30<sup>o</sup>C |
| D. | 20<sup>o</sup>C |
| Answer» B. 40<sup>o</sup>C | |
| 4. |
The color of digestive sludge is ___________ |
| A. | Blue |
| B. | Black |
| C. | Brown |
| D. | Gray |
| Answer» C. Brown | |
| 5. |
The form of sludge which is free from pathogenic bacteria is ___________ |
| A. | Undigested sludge |
| B. | Digested sludge |
| C. | Primary sludge |
| D. | Supernatant liquor |
| Answer» C. Primary sludge | |
| 6. |
How many stages are there in the sludge digestion process? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |