MCQOPTIONS
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MCQOPTIONS
This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate |
| A. | water rich in organic carbon wastes but poor in phosphate |
| B. | water that are anoxic |
| C. | water rich in phosphate wastes but poor in organic carbon |
| D. | none of the above |
| Answer» D. none of the above | |
| 2. |
The acetate-utilizing methanogens are responsible for |
| A. | 20% of methane produced in a biogas reactor |
| B. | 50% of methane produced in a biogas reactor |
| C. | 70% of methane produced in a biogas reactor |
| D. | 85% of methane produced in a biogas reactor |
| Answer» D. 85% of methane produced in a biogas reactor | |
| 3. |
Iron bacteria can produce |
| A. | slime |
| B. | undesirable odors and tastes |
| C. | both (a) and (b) |
| D. | extreme acidity |
| Answer» D. extreme acidity | |
| 4. |
Biomass |
| A. | provides the U.S. with about 50% of its energy |
| B. | consists largely of wood, animal, and human waste |
| C. | is unlikely to be a major source of energy globally |
| D. | offers the consumer high quality energy with low environmental impact |
| Answer» C. is unlikely to be a major source of energy globally | |
| 5. |
Composting is one of the oldest forms of disposal of waste. It is the natural process of decomposition of organic waste that yields manure or compost. One of the following is added to the compost to get better results? |
| A. | Ants |
| B. | Bugs |
| C. | Snakes |
| D. | Worms |
| Answer» E. | |
| 6. |
Which is not a form of biomass energy? |
| A. | Incineration of solid waste |
| B. | Composting to produce methane |
| C. | Ethanol and methanol production for auto fuel |
| D. | Photovoltaic production of hydrogen |
| Answer» E. | |
| 7. |
Which of the following statement is not correct? |
| A. | The use of 25-40 C temperatures allows the biogas production to be more stable |
| B. | The use of 25-40 C temperatures does not destroy potentially harmful bacteria |
| C. | The use of 25-40 C temperatures destroys potentially harmful bacteria |
| D. | None of the above |
| Answer» D. None of the above | |
| 8. |
The use of microbes to break down synthetic waste products such as polychlorinated biphenyls is called |
| A. | bioinformatics |
| B. | biolistics |
| C. | biotechnology |
| D. | bioremediation |
| Answer» E. | |
| 9. |
Advanced treatment is generally used to treat waste water to |
| A. | remove coarse solids |
| B. | remove settleable solids |
| C. | reduce BOD |
| D. | remove additional objectionable substances |
| Answer» E. | |
| 10. |
Treatment of municipal water supplies is based upon |
| A. | coagulation, filtration, chlorination |
| B. | chlorination, filtration, coagulation |
| C. | filtration, coagulation, chlorination |
| D. | coagulation, chlorination, filtration |
| Answer» B. chlorination, filtration, coagulation | |
| 11. |
What is an anaerobic digester? |
| A. | New diet drink |
| B. | Microbe that eats hazardous waste |
| C. | Method to convert agricultural waste into a biogas |
| D. | All of the above |
| Answer» D. All of the above | |
| 12. |
The concept of putting microbes to help clean up the environment is called |
| A. | pasteurization |
| B. | bioremediation |
| C. | fermentation |
| D. | biolistics |
| Answer» C. fermentation | |
| 13. |
Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate |
| A. | water rich in organic carbon wastes but poor in phosphate |
| B. | water that are anoxic |
| C. | water rich in phosphate wastes but poor in organic carbon |
| D. | none of the above |
| Answer» D. none of the above | |
| 14. |
Which of the following is not employed as an oxidation method? |
| A. | Oxidation ponds |
| B. | Trickling filters |
| C. | Contact aerators |
| D. | All of these |
| Answer» E. | |
| 15. |
The filtering medium of trickling filters is coated with microbial flora, known as |
| A. | zoological film |
| B. | geological film |
| C. | zooglocal film |
| D. | none of these |
| Answer» D. none of these | |
| 16. |
The biogas production process takes place at the temperature |
| A. | lesser than 25 C |
| B. | 25-40 C |
| C. | 45-60 C |
| D. | all of these |
| Answer» E. | |
| 17. |
Biogas production is |
| A. | a temperature-dependent process |
| B. | a temperature independent process |
| C. | an oxygen dependent process |
| D. | none of the above |
| Answer» B. a temperature independent process | |
| 18. |
Which of the following is generally not referred to the sewerage system? |
| A. | Sanitary sewers |
| B. | Storm sewers |
| C. | Combined sewers |
| D. | Solid sewers |
| Answer» E. | |
| 19. |
A dense bacterial population caught in a tangled web of fibers sticking to a surface describes |
| A. | coagulation |
| B. | a biodisc |
| C. | a biofilm |
| D. | the membrane filter technique |
| Answer» D. the membrane filter technique | |
| 20. |
Oxidation ponds are shallow ponds, generally designed at the depth of |
| A. | 2 to 40 feet |
| B. | 4 to 6 feet |
| C. | 1 to 3 feet |
| D. | 5 to 8 feet |
| Answer» B. 4 to 6 feet | |
| 21. |
Which of the following is responsible for the corrosion problem? |
| A. | Iron bacteria |
| B. | Sulfur bacteria |
| C. | Slime forming bacteria |
| D. | All of these |
| Answer» C. Slime forming bacteria | |
| 22. |
Water testing relies on the detection of certain indicator organisms known as |
| A. | acid-fast bacteria |
| B. | bacteroids |
| C. | coliforms |
| D. | dinoflagellates |
| Answer» D. dinoflagellates | |
| 23. |
The death of a river by environmental pollutants ultimately results from |
| A. | the overpopulation of algae |
| B. | the overabundance of toxic proteins |
| C. | the depletion of oxygen |
| D. | the buildup of sediment on the river bottom |
| Answer» D. the buildup of sediment on the river bottom | |
| 24. |
Activated sludge contains large number of |
| A. | bacteria |
| B. | yeasts and molds |
| C. | protozoa |
| D. | all of these |
| Answer» E. | |
| 25. |
The acetate-utilizing methanogens are responsible for |
| A. | 20% of methane produced in a biogas reactor |
| B. | 50% of methane produced in a biogas reactor |
| C. | 70% of methane produced in a biogas reactor |
| D. | 85% of methane produced in a biogas reactor |
| Answer» D. 85% of methane produced in a biogas reactor | |
| 26. |
The magnitude of BOD of wastewater is related to |
| A. | bacterial count |
| B. | amount of organic material |
| C. | amount of inorganic material |
| D. | all of the above |
| Answer» C. amount of inorganic material | |