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 pulsator clarifier is a type of __________ |
| A. | Horizontal flow sludge tank |
| B. | Vertical flow sludge tank |
| C. | Circular sludge tank |
| D. | Plain sedimentation tank |
| Answer» C. Circular sludge tank | |
| 2. |
WHICH_DEVICE_SOLVED_THE_PROBLEM_OF_UNSTABLE_HYDRAULIC_CONDITIONS_AND_OPERATION_OF_SLUDGE_REMOVAL_EQUIPMENT??$ |
| A. | Centrifugal pump |
| B. | Pulsator clarifier |
| C. | Tube settler |
| D. | Flocculator |
| Answer» D. Flocculator | |
| 3. |
In which type of tube settler, tubes are slightly inclined in the direction of normal flow?$ |
| A. | Solid contact clarifier |
| B. | Steeply inclined tube settler |
| C. | Vertical tube settler |
| D. | Horizontal tube settler |
| Answer» E. | |
| 4. |
In_which_device,_the_primary_mixing_is_followed_by_a_secondary_reaction_zone_resulting_in_formation_of_sludge_blanket?$ |
| A. | Centrifugal pump |
| B. | Flocculator |
| C. | Tube settler |
| D. | Solid contact clarifier |
| Answer» E. | |
| 5. |
The pulsator clarifier is a type o? |
| A. | Horizontal flow sludge tank |
| B. | Vertical flow sludge tank |
| C. | Circular sludge tank |
| D. | Plain sedimentation tank |
| Answer» C. Circular sludge tank | |
| 6. |
What is the detention period of a clarifier used in the treatment of water? |
| A. | 1hour |
| B. | 2hours |
| C. | 3hours |
| D. | 4hours |
| Answer» D. 4hours | |
| 7. |
The design value of the velocity of flow in a flocculator is _______ |
| A. | 0.2-0.8m/s |
| B. | 0.3-0.5m/s |
| C. | 0.6-0.8m/s |
| D. | 0.1-0.5m/s |
| Answer» B. 0.3-0.5m/s | |
| 8. |
What is the normal value of the detention period adopted in a flocculator for design purpose? |
| A. | 30min |
| B. | 60min |
| C. | 90min |
| D. | 100min |
| Answer» B. 60min | |
| 9. |
What is the desirable value of mean velocity gradient in a flocculator? |
| A. | 20-50sec<sup>-1</sup> |
| B. | 20-75sec<sup>-1</sup> |
| C. | 50-100sec<sup>-1</sup> |
| D. | 30-50sec<sup>-1</sup> |
| Answer» C. 50-100sec<sup>-1</sup> | |
| 10. |
What is the dimension formula of mean velocity gradient? |
| A. | 1/T |
| B. | 1/T2 |
| C. | T |
| D. | T2 |
| Answer» B. 1/T2 | |
| 11. |
The rate of change of velocity per unit distance normal to a section is called_______ |
| A. | Mean velocity |
| B. | Average velocity |
| C. | Mean velocity gradient |
| D. | Velocity gradient |
| Answer» D. Velocity gradient | |
| 12. |
__________ is an operation designed to force agitation in the fluid and induce coagulation. |
| A. | Sedimentation |
| B. | Flocculation |
| C. | Disinfection |
| D. | Aeration |
| Answer» C. Disinfection | |