MCQOPTIONS
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MCQOPTIONS
This section includes 19 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. |
Which of the following is not correct with respect to the effect of oil on treatment systems? |
| A. | Foam formation |
| B. | Toxic to anaerobic bacteria |
| C. | Interferes with settling |
| D. | Explosive with pure oxygen |
| Answer» B. Toxic to anaerobic bacteria | |
| 2. |
What is the maximum pH that the bacteria can sustain in terms of alkalinity? |
| A. | 7 |
| B. | 7.5 |
| C. | 8 |
| D. | 8.5 |
| Answer» E. | |
| 3. |
Which of the following is not a volatile organic compound? |
| A. | Hydrochloric acid |
| B. | Acetaldehyde |
| C. | Formaldehyde |
| D. | Dichloromethane |
| Answer» B. Acetaldehyde | |
| 4. |
The formation of ferrous sulphide leads to the blackening of water. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
WHICH_OF_THE_FOLLOWING_IS_NOT_A_VOLATILE_ORGANIC_COMPOUND??$ |
| A. | Hydrochloric acid |
| B. | Acetaldehyde |
| C. | Formaldehyde |
| D. | Dichloromethane |
| Answer» B. Acetaldehyde | |
| 6. |
Which of the following is not correct with respect to the effect of oil on treatment systems?$ |
| A. | Foam formation |
| B. | Toxic to anaerobic bacteria |
| C. | Interferes with settling |
| D. | Explosive with pure oxygen |
| Answer» B. Toxic to anaerobic bacteria | |
| 7. |
What is the maximum pH that the bacteria can sustain in terms of alkalinity?$ |
| A. | 7 |
| B. | 7.5 |
| C. | 8 |
| D. | 8.5 |
| Answer» E. | |
| 8. |
What is the minimum excess amount of chlorine required to corrode equipment? |
| A. | 30mg/L |
| B. | 40mg/L |
| C. | 50mg/L |
| D. | 60mg/L |
| Answer» C. 50mg/L | |
| 9. |
What is the neutral pH? |
| A. | 6.0 |
| B. | 7.0 |
| C. | 7.5 |
| D. | 8.0 |
| Answer» C. 7.5 | |
| 10. |
What is the temperature limit of the plastic pipe? |
| A. | 30ÀöC |
| B. | 40ÀöC |
| C. | 50ÀöC |
| D. | 60ÀöC |
| Answer» C. 50‚àö√Ñ‚àö‚àÇC | |
| 11. |
Which of the following is not correct with respect to the effects of acids on treatment systems? |
| A. | Destroy microbes |
| B. | Upset anaerobic digester |
| C. | Corrode structures |
| D. | Interferes with settling |
| Answer» E. | |
| 12. |
The formation of ferrous sulphide leads to the blackening of water? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
What is the colour of septic wastewater? |
| A. | Grey |
| B. | Black |
| C. | Light brown |
| D. | Dark brown |
| Answer» C. Light brown | |
| 14. |
What is the colour of the wastewater after 6 hours of a generation? |
| A. | Grey |
| B. | Light brown |
| C. | Dark brown |
| D. | Dark grey |
| Answer» C. Dark brown | |
| 15. |
What is the minimum required the temperature to categorize as volatile solids? |
| A. | 500ÀöC |
| B. | 600ÀöC |
| C. | 700ÀöC |
| D. | 800ÀöC |
| Answer» C. 700‚àö√Ñ‚àö‚àÇC | |
| 16. |
What is the percentage of settleable solids in municipal wastewater? |
| A. | 60 % |
| B. | 70 % |
| C. | 80 % |
| D. | 90 % |
| Answer» B. 70 % | |
| 17. |
What is the minimum percentage of solids in wastewater? |
| A. | 30 % |
| B. | 40 % |
| C. | 50 % |
| D. | 60 % |
| Answer» C. 50 % | |
| 18. |
Total solids in a wastewater consist of insoluble solids alone. |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Which of the following is not a physical characteristic? |
| A. | Colour |
| B. | pH |
| C. | Odour |
| D. | Temperature |
| Answer» C. Odour | |