MCQOPTIONS
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MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology of Waste Water knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Among the following which microorganism acts as a representative of fecal streptococci group? |
| A. | Streptococcus faecalis |
| B. | Streptococcus bovis |
| C. | Streptococcus equinus |
| D. | Streptococcus faecium |
| Answer» B. Streptococcus bovis | |
| 2. |
Raw milk of good sanitary quality will develop sweet flavour. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 3. |
What is the pH of bananas? |
| A. | 2.3 |
| B. | 5.0 |
| C. | 7.0 |
| D. | 12.0 |
| Answer» C. 7.0 | |
| 4. |
Which of the following organism occurs on the skin of fresh poultry? |
| A. | pseudomonads |
| B. | staphylococci |
| C. | micrococci |
| D. | enterococci |
| Answer» B. staphylococci | |
| 5. |
The potability of water can be checked by sanitary surveys. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 6. |
The coliform group of bacteria includes all the __________________ bacilli |
| A. | aerobic |
| B. | anaerobic |
| C. | aerobic,non-sporulating |
| D. | aerobic,Gram-negative,non-sporulating |
| Answer» E. | |
| 7. |
Alum is used for which of the following purification process? |
| A. | Sedimentation |
| B. | Filtration |
| C. | Disinfection |
| D. | Ozonation |
| Answer» B. Filtration | |
| 8. |
Which of the following forms of water is the most contaminated? |
| A. | Underground water |
| B. | Rainwater |
| C. | Surface water |
| D. | Water stored in ice caps |
| Answer» D. Water stored in ice caps | |
| 9. |
The maximum desirable limit (BIS) of total hardness (as CaCo3) in drinking water is |
| A. | 600 ppm |
| B. | 300 ppm |
| C. | 500 ppm |
| D. | 1000 ppm |
| Answer» C. 500 ppm | |
| 10. |
Secondary treatment uses __________ to consume wastes |
| A. | micro-organisms |
| B. | chemicals |
| C. | filtration |
| D. | none of these |
| Answer» B. chemicals | |
| 11. |
In which of the following organism does iron secreted to form stalks or ribbons attached to the cell? |
| A. | Sphaerotilus |
| B. | Gallionella |
| C. | Thiobacillus |
| D. | Streptococcus |
| Answer» C. Thiobacillus | |
| 12. |
Which of the following sewerage systems carry domestic and industrial waste water? |
| A. | sanitary sewers |
| B. | storm sewers |
| C. | combined sewers |
| D. | storm and combined sewers |
| Answer» B. storm sewers | |
| 13. |
Thiobacillus can produce an acidity in the range of pH __________ |
| A. | 7 |
| B. | 5 |
| C. | 3 |
| D. | 1 |
| Answer» E. | |
| 14. |
What will be the plate count of good quality water? |
| A. | 10 per ml |
| B. | 50 per ml |
| C. | 100 per ml |
| D. | 1000 per ml |
| Answer» D. 1000 per ml | |
| 15. |
Which of the following acts as a carbon source for Enterobacter aerogenes? |
| A. | Peptone |
| B. | Sodium citrate |
| C. | Yeast extract |
| D. | Tryptone |
| Answer» E. | |
| 16. |
Activated sludge usually employs an aeration period of ________________ |
| A. | 1 hour |
| B. | 24 hours |
| C. | 10-15 hours |
| D. | 4-8 hours |
| Answer» E. | |
| 17. |
Which of the following is a strict anaerobe? |
| A. | Enterobacter |
| B. | Alcaligenes |
| C. | Pseudomonas |
| D. | Methanosarcina |
| Answer» E. | |
| 18. |
Which of the following sewerage systems carry domestic and industrial wastewater? |
| A. | sanitary sewers |
| B. | storm sewers |
| C. | combined sewers |
| D. | storm and combined sewers |
| Answer» B. storm sewers | |
| 19. |
Which of the following gases are produced in large amounts during sludge digestion? |
| A. | methane |
| B. | carbon-dioxide |
| C. | hydrogen |
| D. | nitrogen |
| Answer» B. carbon-dioxide | |
| 20. |
Oxidation ponds are very deep ponds. |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
Trickling filter is used in which of the following wastewater treatment processes? |
| A. | Primary treatment |
| B. | Secondary treatment |
| C. | Advanced treatment |
| D. | Final treatment |
| Answer» C. Advanced treatment | |
| 22. |
Belt filter presses are used in which of the following process? |
| A. | Thickening |
| B. | Stabilization |
| C. | Dewatering |
| D. | Disposal |
| Answer» D. Disposal | |
| 23. |
The more oxidizable organic material, the lesser the BOD. |
| A. | True |
| B. | False |
| Answer» C. | |
| 24. |
Coliforms are natural inhabitants of the large intestine of human and animals. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 25. |
Which of the following organism does not belong to coliform group of bacteria? |
| A. | Salmonella |
| B. | Serratia |
| C. | Enterobacter |
| D. | Proteus |
| Answer» D. Proteus | |
| 26. |
The upper region of the trickling filter is favorable for the growth of _____________ |
| A. | fungi |
| B. | protozoa |
| C. | algae |
| D. | bacteria |
| Answer» D. bacteria | |
| 27. |
In which of the following treatment involve oxidation of organic constituents of the wastewater? |
| A. | Primary treatment |
| B. | Secondary treatment |
| C. | Advanced treatment |
| D. | Final treatment |
| Answer» C. Advanced treatment | |