MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 effective area of tube diffuser used in the aeration tank is ___________ |
| A. | 400cm2 |
| B. | 780cm2 |
| C. | 1160cm2 |
| D. | 800cm2 |
| Answer» D. 800cm2 | |
| 2. |
The maximum depth of aeration tank used in activated sludge process is ___________ |
| A. | 1m |
| B. | 2m |
| C. | 4.5m |
| D. | 5.5m |
| Answer» D. 5.5m | |
| 3. |
The effective area of the diffuser plate used in the aeration tank is ___________ |
| A. | 400cm2 |
| B. | 780cm2 |
| C. | 1160cm2 |
| D. | 800cm2 |
| Answer» C. 1160cm2 | |
| 4. |
The maximum quantity of air required in diffused aerator is ______ m3 per million litres of sewage. |
| A. | 4000 |
| B. | 5000 |
| C. | 6000 |
| D. | 8000 |
| Answer» E. | |
| 5. |
With which device, the air is introduced in the aeration tank? |
| A. | Diffuser plate |
| B. | Paddles |
| C. | Cone with spiral vanes |
| D. | Header pipe |
| Answer» B. Paddles | |
| 6. |
The effective area of tube diffuser used in the aeration tank is |
| A. | 400cm<sup>2</sup> |
| B. | 780cm<sup>2</sup> |
| C. | 1160cm<sup>2</sup> |
| D. | 800cm<sup>2</sup> |
| Answer» D. 800cm<sup>2</sup> | |
| 7. |
With how much pressure the air is filled in the aeration tank? |
| A. | 70-90kN/m<sup>2</sup> |
| B. | 34-56kN/m<sup>2</sup> |
| C. | 10-20kN/m<sup>2</sup> |
| D. | 35-70kN/m<sup>2</sup> |
| Answer» E. | |
| 8. |
Which device is used in the aeration tank for cleaning purposes? |
| A. | Diffuser plate |
| B. | Paddles |
| C. | Tube diffuser |
| D. | Header pipe |
| Answer» D. Header pipe | |
| 9. |
The maximum depth of aeration tank used in activated sludge process is |
| A. | 1m |
| B. | 2m |
| C. | 4.5m |
| D. | 5.5m |
| Answer» D. 5.5m | |
| 10. |
The effective area of the diffuser plate used in the aeration tank is |
| A. | 400cm<sup>2</sup> |
| B. | 780cm<sup>2</sup> |
| C. | 1160cm<sup>2</sup> |
| D. | 800cm<sup>2</sup> |
| Answer» C. 1160cm<sup>2</sup> | |
| 11. |
The maximum quantity of air required in diffused aerator is ______ m3 per million litres of sewage. |
| A. | 4000 |
| B. | 5000 |
| C. | 6000 |
| D. | 8000 |
| Answer» E. | |
| 12. |
Which of the following is called as air diffusion method? |
| A. | Activated sludge aeration |
| B. | Diffused air aeration |
| C. | Mechanical aeration |
| D. | Combined aeration |
| Answer» C. Mechanical aeration | |