MCQOPTIONS
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MCQOPTIONS
This section includes 24 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How can biofilm formation be prevented? |
| A. | By installing a microfilter prior to Reverse Osmosis |
| B. | By installing a nanofilter prior to Reverse Osmosis |
| C. | By installing a ultrafilter prior to Reverse Osmosis |
| D. | By installing a pressure sand filter prior to Reverse Osmosis |
| Answer» B. By installing a nanofilter prior to Reverse Osmosis | |
| 2. |
Which of these do not cause scaling of the membranes? |
| A. | Organic and inorganic colloids |
| B. | Calcium sulphate |
| C. | Silica |
| D. | Calcium carbonate |
| Answer» B. Calcium sulphate | |
| 3. |
Which of these pollutants cause biofilm formation? |
| A. | Calcium sulphate |
| B. | Silica |
| C. | Calcium carbonate |
| D. | Oxides |
| Answer» E. | |
| 4. |
Operating conditions also affect fouling of the membrane. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
What is the percentage of earth’s salt water? |
| A. | 97% |
| B. | 97.1% |
| C. | 97.2% |
| D. | 97.3% |
| Answer» D. 97.3% | |
| 6. |
WHICH_OF_THESE_POLLUTANTS_CAUSE_BIOFILM_FORMATION??$ |
| A. | Calcium sulphate |
| B. | Silica |
| C. | Calcium carbonate |
| D. | Oxides |
| Answer» E. | |
| 7. |
How can biofilm formation be prevented?$ |
| A. | By installing a microfilter prior to Reverse Osmosis |
| B. | By installing a nanofilter prior to Reverse Osmosis |
| C. | By installing a ultrafilter prior to Reverse Osmosis |
| D. | By installing a pressure sand filter prior to Reverse Osmosis |
| Answer» B. By installing a nanofilter prior to Reverse Osmosis | |
| 8. |
Which of these do not cause scaling of the membranes?$ |
| A. | Organic and inorganic colloids |
| B. | Calcium sulphate |
| C. | Silica |
| D. | Calcium carbonate |
| Answer» B. Calcium sulphate | |
| 9. |
What is the MFI in s/L2 assumed for reverse osmosis spiral wound? |
| A. | 2-6 |
| B. | 6-10 |
| C. | 0-2 |
| D. | 14-18 |
| Answer» D. 14-18 | |
| 10. |
What is the MFI in s/L2 assumed for reverse osmosis hollow fibre? |
| A. | 0-2 |
| B. | 6-8 |
| C. | 8-12 |
| D. | 12-16 |
| Answer» B. 6-8 | |
| 11. |
What is the MFI in s/L2 assumed for nanofiltration? |
| A. | 0-10 |
| B. | 20-25 |
| C. | 12-15 |
| D. | 15-20 |
| Answer» B. 20-25 | |
| 12. |
What is the SDI assumed for reverse osmosis hollow fibre? |
| A. | 4-6 |
| B. | 0-3 |
| C. | 6-8 |
| D. | 8-10 |
| Answer» C. 6-8 | |
| 13. |
What is the SDI assumed for reverse osmosis spiral wound? |
| A. | 0-2 |
| B. | 5-9 |
| C. | 9-13 |
| D. | 13-15 |
| Answer» B. 5-9 | |
| 14. |
What is the SDI assumed for nanofiltration? |
| A. | 4-6 |
| B. | 0-2 |
| C. | 2-4 |
| D. | 6-8 |
| Answer» C. 2-4 | |
| 15. |
How can scaling be prevented? |
| A. | By adding sodium hydroxide |
| B. | By adding lime |
| C. | By adding HCl |
| D. | By adding alum |
| Answer» D. By adding alum | |
| 16. |
Which of the following factors does membrane fouling does not depend on? |
| A. | Solute |
| B. | Operating conditions |
| C. | Climate |
| D. | Hydrodynamics |
| Answer» D. Hydrodynamics | |
| 17. |
Operating conditions also affect fouling of the membrane? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 18. |
What is the surface roughness of NF270 membrane? |
| A. | 3.6 nm |
| B. | 4.1 nm |
| C. | 5.3 nm |
| D. | 6.8 nm |
| Answer» C. 5.3 nm | |
| 19. |
What is the surface roughness of the BW30 membrane? |
| A. | 60 nm |
| B. | 62.6 nm |
| C. | 64.5 nm |
| D. | 66.2 nm |
| Answer» C. 64.5 nm | |
| 20. |
What is the average pore diameter of NF270? |
| A. | 0.52 nm |
| B. | 0.64 nm |
| C. | 0.76 nm |
| D. | 0.84 nm |
| Answer» E. | |
| 21. |
________ is a process whereby a solution or a particle is deposited on a membrane surface or in membrane pores. |
| A. | Deposition |
| B. | Absorption |
| C. | Membrane fouling |
| D. | Membrane accumulation |
| Answer» D. Membrane accumulation | |
| 22. |
What is the average permeating of SiO2 in reverse osmosis? |
| A. | 0.2-0.3 |
| B. | 0.4-0.6 |
| C. | 0.6-0.8 |
| D. | 0.8-1 |
| Answer» D. 0.8-1 | |
| 23. |
The formation of the alkaline scale is a function of the operational temperature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 24. |
What is the percentage of earth’s salt water? |
| A. | 97% |
| B. | 97.1% |
| C. | 97.2% |
| D. | 97.3% |
| Answer» D. 97.3% | |