MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The reduction of carbon dioxide by cascade aerators is in the range of |
| A. | 10-20% |
| B. | 20-30% |
| C. | 40-50% |
| D. | 50-60% |
| Answer» E. | |
| 2. |
______ are used in fine screen so that they do not get clogged up. |
| A. | Automatic strainers |
| B. | Spray aerators |
| C. | Cascade aerators |
| D. | Gravel bed aerators |
| Answer» B. Spray aerators | |
| 3. |
State whether the following statement is True or False.Dealkalization results in removal of all the ions from the water. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The elapsed time in gravity filter is 1sec. What is the height of fall in a single descent? |
| A. | 4.4m |
| B. | 4.9m |
| C. | 8.8m |
| D. | 9.8m |
| Answer» C. 8.8m | |
| 5. |
Solids are removed from the water by which of the following unit operation? |
| A. | Inter facial contact |
| B. | Solid stabilization |
| C. | Ion transfer |
| D. | Solids transfer |
| Answer» E. | |
| 6. |
In which type of aerator, the flow of water is divided into fine streams and small droplets? |
| A. | Cascade aerator |
| B. | Inclined apron aerator |
| C. | Spray aerator |
| D. | Gravel bed aerator |
| Answer» B. Inclined apron aerator | |
| 7. |
By which process, odour producing substances is oxidized? |
| A. | Chlorination |
| B. | Liming |
| C. | Re-carbonation |
| D. | Super-chlorination |
| Answer» E. | |
| 8. |
State whether the following statement is True or False.Micro strainers are used to remove color in water. |
| A. | True |
| B. | False |
| Answer» C. | |