MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Leftover material in secondary treatment is used as |
| A. | Waste |
| B. | Manure |
| C. | Disposed Off |
| D. | All of Above |
| Answer» C. Disposed Off | |
| 2. |
Chlorides are mineral salts, and cannot be affected by |
| A. | Chemical Actions |
| B. | Biological Action |
| C. | Temperature |
| D. | Turbidity |
| Answer» C. Temperature | |
| 3. |
The change of ocean water from water droplet to water vapors in the atmosphere is known as |
| A. | evaporation |
| B. | hydration |
| C. | Transpiration |
| D. | condensation |
| Answer» B. hydration | |
| 4. |
Which water bred disease affects cattles more than humans? |
| A. | Typhoid |
| B. | Sleeping sickness |
| C. | Diarrhea |
| D. | Dengue |
| Answer» C. Diarrhea | |
| 5. |
What is main contamination in water? |
| A. | Human Faeces |
| B. | Metals |
| C. | chemicals |
| D. | Insects |
| Answer» C. chemicals | |
| 6. |
What oxidized in second stage of aerobic decomposition? |
| A. | Nitrogenous matter |
| B. | Carbonaceous matter |
| C. | Organic matter |
| D. | Inorganic Dusts |
| Answer» B. Carbonaceous matter | |
| 7. |
Inorganic salts, mineral acids and metal compounds are: |
| A. | Inorganic pollutants |
| B. | Organic pollutants |
| C. | Air pollution |
| D. | All of them |
| Answer» B. Organic pollutants | |
| 8. |
Marine pollution is mainly due to |
| A. | Dumping of ships |
| B. | offshore Mining |
| C. | Oil production |
| D. | All of these |
| Answer» E. | |
| 9. |
What are algae helpful for ? |
| A. | Turbidity |
| B. | Hydrography |
| C. | Self Purification |
| D. | Decomposition |
| Answer» D. Decomposition | |
| 10. |
When the oil tanker of the hall is bleached the contacts of the hold spill out into the |
| A. | Lake |
| B. | Sea |
| C. | Pond |
| D. | River |
| Answer» C. Pond | |
| 11. |
High Yielding Varieties of Seed is described as a |
| A. | Green revolution |
| B. | Environmental Revolution |
| C. | Crop Revolution |
| D. | High Yield Revolution |
| Answer» B. Environmental Revolution | |
| 12. |
Which oil cleaning up operation is used for inflatable tubes to prevent slicks from spreading? |
| A. | Booms |
| B. | Detergent Spray |
| C. | Skimmer |
| D. | All of these |
| Answer» B. Detergent Spray | |
| 13. |
Warm water release from power station causes |
| A. | Water pollution |
| B. | Soil pollution |
| C. | Air Pollution |
| D. | Thermal Pollution |
| Answer» E. | |
| 14. |
Pesticides contains which chemicals, which are harmful to human health? |
| A. | Toxic Chemicals |
| B. | Industrial Chemicals |
| C. | Nitrates and phosphates |
| D. | Lead |
| Answer» B. Industrial Chemicals | |
| 15. |
The water pollution is increased by the agricultural activities is due to |
| A. | Increase of wheat |
| B. | Increase of crop yield |
| C. | Increase in cultivation |
| D. | All of these |
| Answer» C. Increase in cultivation | |
| 16. |
HYVs stands for |
| A. | High Yielding Variations of Seed |
| B. | High Yielding Varieties of Seed |
| C. | High Yielding Varieties of Soil |
| D. | High Yielding Varieties of Sands |
| Answer» C. High Yielding Varieties of Soil | |
| 17. |
As temperature increases, water reduces amount of dissolved oxygen, resulting in increased |
| A. | Nutrient activity |
| B. | Chemical processes |
| C. | Biological activity |
| D. | Environmental activity |
| Answer» D. Environmental activity | |
| 18. |
Precipitation is prevented from falling directly on the ground by plants, this process is called |
| A. | Condensation |
| B. | interception |
| C. | osmosis |
| D. | Photosynthesis |
| Answer» C. osmosis | |
| 19. |
Industrial, municipal sewage, treatment plants are examples of |
| A. | Diffused sources |
| B. | Point Sources |
| C. | Stationary Sources |
| D. | Line Sources |
| Answer» C. Stationary Sources | |
| 20. |
Acids and alkalies collectively, change 'pH' value of |
| A. | Water |
| B. | Liquids |
| C. | Air |
| D. | Solids |
| Answer» B. Liquids | |
| 21. |
'Polychlorinated biphenyls' are by products of plastics, lubricants, rubber and |
| A. | Paper production |
| B. | Wood production |
| C. | Steel production |
| D. | All of above |
| Answer» B. Wood production | |
| 22. |
What are the sources of radioactive wastes in the marine ? |
| A. | discharge from nuclear power stations |
| B. | Reprocessing plants |
| C. | Military Wastes |
| D. | All of these |
| Answer» E. | |
| 23. |
In which country ranching is the major factor in clearing of forests? |
| A. | Africa |
| B. | Europe |
| C. | Asia |
| D. | America |
| Answer» E. | |
| 24. |
Which is first stage of waste treatment plant? |
| A. | Preliminary Treatment |
| B. | Primary treatment |
| C. | Secondary Treatment |
| D. | Tertiary Treatment |
| Answer» B. Primary treatment | |
| 25. |
Which Organization tackle the marine pollution issues locally? |
| A. | United Nations |
| B. | United Nations Environmental Programme |
| C. | UNESCO |
| D. | All of these |
| Answer» C. UNESCO | |
| 26. |
Disposal of sewage and industrial effluents into water bodies, resulting in contamination of |
| A. | Soil |
| B. | Water |
| C. | Air |
| D. | Atmosphere |
| Answer» C. Air | |
| 27. |
Oil up drawn up absorbent belt for |
| A. | Skimmer |
| B. | Detergent Spray |
| C. | Booms |
| D. | All of these |
| Answer» B. Detergent Spray | |
| 28. |
'fixed' solids represents |
| A. | Inorganic Solids |
| B. | Colloidal Solids |
| C. | Suspended solids |
| D. | Settatleable solids |
| Answer» B. Colloidal Solids | |
| 29. |
Preliminary treatment is carried out for removal of the |
| A. | Dissolved materials |
| B. | Floating Materials |
| C. | Suspended solids |
| D. | Organic matters |
| Answer» C. Suspended solids | |
| 30. |
'Turbidity' in sewage is caused by |
| A. | Colloidal liquids |
| B. | Suspended and Colloidal Solids |
| C. | chemicals |
| D. | waste water |
| Answer» C. chemicals | |
| 31. |
What are the sauces of sediments in causing marine pollution? |
| A. | Deforestation |
| B. | Soil erosion |
| C. | Mining and Farming |
| D. | All of these |
| Answer» E. | |
| 32. |
What causes excessive growth of algae and other aquatic plants? |
| A. | Waste matters |
| B. | Organic Nutrients |
| C. | Inorganic Nutrients |
| D. | Solid waste |
| Answer» D. Solid waste | |
| 33. |
Waste water contains a variety of microorganism, includes: bacterias and |
| A. | Fungi |
| B. | Worms |
| C. | Rotifers |
| D. | Bats |
| Answer» B. Worms | |
| 34. |
'volatile solids' represents the |
| A. | Dissolved solids |
| B. | Organic Solids |
| C. | Colloidal Solids |
| D. | Suspended Solids |
| Answer» C. Colloidal Solids | |
| 35. |
What causes rise in nutrient level of water ? |
| A. | Deforestation |
| B. | Biodegradation |
| C. | Eutrophication |
| D. | Composition |
| Answer» C. Eutrophication | |
| 36. |
Temperature, oxygen is more soluble in water: |
| A. | 40°C |
| B. | 30°C |
| C. | 20°C |
| D. | 15°C |
| Answer» D. 15°C | |
| 37. |
Which Diseases are spread by drinking contaminated water? |
| A. | Water Borne |
| B. | Water Based |
| C. | Water bred |
| D. | All of these |
| Answer» B. Water Based | |
| 38. |
Which disease is transmitted by mosquitoes? |
| A. | Malaria |
| B. | Typhoid |
| C. | Dysentery |
| D. | diarrhea |
| Answer» B. Typhoid | |
| 39. |
What is injected by the mosquito to the bloodstream of human, when the next person is bitten |
| A. | Blood |
| B. | Saliva |
| C. | Water |
| D. | Plasma |
| Answer» C. Water | |
| 40. |
In which treatment, microorganism decompose fine organic matter? |
| A. | Preliminary Treatment |
| B. | Biological Treatment |
| C. | Secondary Treatment |
| D. | Tertiary Treatment |
| Answer» C. Secondary Treatment | |
| 41. |
Most of organic matter present in sewage is |
| A. | Producer |
| B. | Decomposer |
| C. | Biodegradable |
| D. | All of above |
| Answer» D. All of above | |
| 42. |
What are the impacts of toxic wastes in the marine environment? |
| A. | Poisoning |
| B. | contamination |
| C. | Kills the marine life |
| D. | All of these |
| Answer» E. | |
| 43. |
In a digestion tank, produced gases has a high |
| A. | Calorific value |
| B. | density |
| C. | Gas Value |
| D. | Digestion Value |
| Answer» B. density | |
| 44. |
Why Marine problem is a Global Problem? |
| A. | because all oceans are linked |
| B. | All lands are connected |
| C. | Both a and b |
| D. | None of these |
| Answer» B. All lands are connected | |
| 45. |
What are kinds of water pollution ? |
| A. | Point-source |
| B. | Trans-boundary |
| C. | Human trash |
| D. | Both a and b |
| Answer» E. | |
| 46. |
The mosquitoes breed in |
| A. | Stagnant Water |
| B. | Lakes |
| C. | Ponds |
| D. | All of these |
| Answer» E. | |
| 47. |
Malaria causes 90% of deaths in which continent? |
| A. | Asia |
| B. | Africa |
| C. | America |
| D. | Europe |
| Answer» C. America | |
| 48. |
Some common type of compounds present in crude oil are: |
| A. | Parafins and aromatic compounds |
| B. | Phosphorous and aquatic compound |
| C. | Gases and chemicals |
| D. | Thick grease compounds |
| Answer» B. Phosphorous and aquatic compound | |
| 49. |
In secondary treatment, solid reducers, ranges from |
| A. | 70-92% |
| B. | 80-90% |
| C. | 20-60% |
| D. | 10-70% |
| Answer» B. 80-90% | |
| 50. |
Mass toursim is associated with |
| A. | Mountain Areas |
| B. | Coastal Areas |
| C. | Plan Landscapes |
| D. | Forests |
| Answer» C. Plan Landscapes | |