MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 17 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. |
______ 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 | |
| 2. |
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 | |
| 3. |
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 | |
| 4. |
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. | |
| 5. |
Micro strainers are used to remove color in water. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
The head loss through screen depends on _______________ |
| A. | Shape of screen elements |
| B. | Open area, block area |
| C. | Approach velocity |
| D. | Nature of their construction, approach velocity |
| Answer» E. | |
| 7. |
What is the size of the coarse screen used in pretreatment of water? |
| A. | 25mm |
| B. | 50mm |
| C. | 75mm |
| D. | 100mm |
| Answer» B. 50mm | |
| 8. |
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 | |
| 9. |
______ 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 | |
| 10. |
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 | |
| 11. |
The reduction of carbon dioxide by cascade aerators is in the range o? |
| A. | 10-20% |
| B. | 20-30% |
| C. | 40-50% |
| D. | 50-60% |
| Answer» E. | |
| 12. |
Identify the incorrect statement regarding aeration process. |
| A. | It removes taste and odor |
| B. | It increases the dissolved oxygen content of water |
| C. | It increases the carbon dioxide content of water |
| D. | It is used for mixing chemicals with water |
| Answer» D. It is used for mixing chemicals with water | |
| 13. |
The shape factor for circular rods in finding the head loss through the screen is _____ |
| A. | 1.79 |
| B. | 2.42 |
| C. | 1.83 |
| D. | 1.45 |
| Answer» B. 2.42 | |
| 14. |
The head loss through screen depends on |
| A. | Shape of screen elements |
| B. | Open area, block area |
| C. | Approach velocity |
| D. | Nature of their construction, approach velocity |
| Answer» E. | |
| 15. |
The coarse screen is inclined at _____ to facilitate the cleaning or raking. |
| A. | 300 |
| B. | 350 |
| C. | 450 |
| D. | 900 |
| Answer» D. 900 | |
| 16. |
What is the size of coarse screen used in pretreatment of water? |
| A. | 25mm |
| B. | 50mm |
| C. | 75mm |
| D. | 100mm |
| Answer» B. 50mm | |
| 17. |
Which process of water treatment is done to avoid floating debris, branches, trees or other large particles suspended in water? |
| A. | Screening |
| B. | Aeration |
| C. | Primary sedimentation |
| D. | Secondary sedimentation |
| Answer» B. Aeration | |