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. |
How many types of environmental disease are Related to water? |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 6 |
| Answer» C. 2 | |
| 2. |
Pesticides are destroying the land |
| A. | Fauna |
| B. | Flora |
| C. | Both a and b |
| D. | None of these |
| Answer» B. Flora | |
| 3. |
Coral reefs are a combination of both |
| A. | Plants and Animals |
| B. | Humans and Animals |
| C. | Plants and Humans |
| D. | Microorganism and Plants |
| Answer» B. Humans and Animals | |
| 4. |
Oil spillages and other pollutants last longest in the |
| A. | Warm Environment |
| B. | Cold Environment |
| C. | Both a and b |
| D. | None of these |
| Answer» C. Both a and b | |
| 5. |
Bacteria which carry out decomposition of organic matter is known as |
| A. | Anaerobic Bacteria |
| B. | Aerobic Bacteria |
| C. | Virus |
| D. | Rotifers |
| Answer» C. Virus | |
| 6. |
Tropical mangroves are dradged to make way for |
| A. | Tourists |
| B. | Marinas |
| C. | Local People |
| D. | Animals |
| Answer» C. Local People | |
| 7. |
In Uk pesticides are blamed in the rapid decrease of |
| A. | Honey Bees |
| B. | caterpillars |
| C. | Bees and Butterflies |
| D. | Butterflies |
| Answer» D. Butterflies | |
| 8. |
Where coral reefs are formed? |
| A. | On the Mountains |
| B. | Hilly Areas |
| C. | Seas |
| D. | Forests |
| Answer» D. Forests | |
| 9. |
Solids which remain dissolved in sewage is known as |
| A. | Settaleable Solids |
| B. | Colloidal Solids |
| C. | Suspended solids |
| D. | Dissolved Solids |
| Answer» E. | |
| 10. |
Which human activity is responsible for 80% of destruction of forests? |
| A. | Cultivation |
| B. | Ranching |
| C. | Razing |
| D. | Urbanization |
| Answer» B. Ranching | |
| 11. |
In domestic waste, human waste carries |
| A. | Lead |
| B. | Solid waste |
| C. | Pathogens microorganisms |
| D. | All of these |
| Answer» D. All of these | |
| 12. |
'turbidity' increases as long as sewage becomes |
| A. | Weak |
| B. | Strong |
| C. | Wide |
| D. | High |
| Answer» C. Wide | |
| 13. |
Each year, how many people experience pesticides poisoning in developing countries? |
| A. | 30 Million |
| B. | 25 Million Farm workers |
| C. | 20 Million |
| D. | 10 Million people |
| Answer» C. 20 Million | |
| 14. |
Nitrogen in sewage indicates presence of |
| A. | Chemicals |
| B. | Inorganic Matter |
| C. | Organic matter |
| D. | Microorganism |
| Answer» D. Microorganism | |
| 15. |
What percent of freshwater consist of lakes on earth? |
| A. | 0.01% |
| B. | 0.04% |
| C. | 0.03% |
| D. | 0.30% |
| Answer» E. | |
| 16. |
What does high velocity in river cause ? |
| A. | Reaeration |
| B. | Currents |
| C. | Hydrography |
| D. | Turbidity |
| Answer» B. Currents | |
| 17. |
'BOD' stands for |
| A. | Biological Oxygen demand |
| B. | Biological Demand |
| C. | Biodegradation |
| D. | All of them |
| Answer» B. Biological Demand | |
| 18. |
Water vapor is carried up by air currents; when it gets cooled it leads to |
| A. | Precipitation |
| B. | osmosis |
| C. | condensation |
| D. | Evapo-transpiration |
| Answer» D. Evapo-transpiration | |
| 19. |
Nitrogen free compound includes: |
| A. | Carbohydrates |
| B. | Phosphorous |
| C. | Nutrients |
| D. | All of above |
| Answer» B. Phosphorous | |
| 20. |
In SOCs, most common organic pollutants are: |
| A. | DDT |
| B. | Weed killers |
| C. | Pesticides, Herbicides |
| D. | Sprays |
| Answer» D. Sprays | |
| 21. |
Which of the two rivers of Europe flows into the Mediterranean Sea? |
| A. | Danube river |
| B. | Dneiper River |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 22. |
What are the impacts of sediments on marine life? |
| A. | Block water flow |
| B. | Cover coastal ecosystem |
| C. | Clogs gills of fish |
| D. | All of these |
| Answer» E. | |
| 23. |
Which oil cleaning up operation is used is used to break up oil into droplets, dispersing large slicks? |
| A. | Detergent Spray |
| B. | Skimmer |
| C. | Booms |
| D. | All of these |
| Answer» B. Skimmer | |
| 24. |
Rise in temperature due to heat from power plant and industries is known as |
| A. | Heat Pollution |
| B. | Thermal Pollution |
| C. | Waste pollution |
| D. | Solid Pollution |
| Answer» C. Waste pollution | |
| 25. |
Which solids remain floating in sewage ? |
| A. | Suspended solids |
| B. | Colloidal Solids |
| C. | Dissolved solids |
| D. | Settatleable solids |
| Answer» B. Colloidal Solids | |
| 26. |
Labors in the cotton field suffers from |
| A. | Skin disease |
| B. | Disfiguration |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 27. |
Over half the world's tankers have only |
| A. | Single Hall |
| B. | Double Hall |
| C. | Many Halls |
| D. | No Halls |
| Answer» B. Double Hall | |
| 28. |
Why they vary enormously in shape, size and colours? |
| A. | Due sea water |
| B. | due to widest range of species |
| C. | Due to water temperature |
| D. | Due to nutrient concentration |
| Answer» C. Due to water temperature | |
| 29. |
Polluted water causes what Diseases in human? |
| A. | Sickness and Diarrhea |
| B. | T.B |
| C. | Fever |
| D. | Abdominal Pain |
| Answer» B. T.B | |
| 30. |
Air temperature decreases with |
| A. | Height |
| B. | Length |
| C. | Both a and b |
| D. | Width |
| Answer» B. Length | |
| 31. |
Rain is the most common example of |
| A. | hydration |
| B. | Precipitation |
| C. | condensation |
| D. | osmosis |
| Answer» C. condensation | |
| 32. |
What percent of soil contains freshwater on earth? |
| A. | 0.08% |
| B. | 0.06% |
| C. | 0.01% |
| D. | 0.04% |
| Answer» C. 0.01% | |
| 33. |
The high Lead level can cause |
| A. | Kidney stone |
| B. | Bladder Failure |
| C. | Brain Damage |
| D. | Accumulation in the body |
| Answer» D. Accumulation in the body | |
| 34. |
In which sector tourism has good impact of any country? |
| A. | Social Sector |
| B. | Economic Sector |
| C. | Biologically |
| D. | Environmental |
| Answer» C. Biologically | |
| 35. |
In humans, nitrates causes blood disease and |
| A. | Gastric cancer |
| B. | Bladder infection |
| C. | Skin infection |
| D. | Lung disease |
| Answer» B. Bladder infection | |
| 36. |
What causes PCBs and dioxins ? |
| A. | Heart disease |
| B. | Cancer |
| C. | Lung disease |
| D. | Skin infection |
| Answer» C. Lung disease | |
| 37. |
Nitrates, phosphates and sulphates are plants |
| A. | Disease |
| B. | Pollutants |
| C. | Nutrients |
| D. | Organic pollutants |
| Answer» D. Organic pollutants | |
| 38. |
What is the percentage of ice on earth? |
| A. | 66.60% |
| B. | 74.50% |
| C. | 65% |
| D. | 84% |
| Answer» C. 65% | |
| 39. |
Solubility of oxygen in water is inversely proportional to |
| A. | Pressure |
| B. | Temperature |
| C. | Carbon dioxide |
| D. | Oxygen |
| Answer» C. Carbon dioxide | |
| 40. |
Sources, in which locations cannot be indentified is known as |
| A. | Stationary Sources |
| B. | Diffused Sources |
| C. | Point Sources |
| D. | Line Sources |
| Answer» C. Point Sources | |
| 41. |
Sewage consist of 99.9% of |
| A. | Oxygen |
| B. | Nutrients |
| C. | Waste |
| D. | Water |
| Answer» E. | |
| 42. |
Secondary treatment is carried out for removal of |
| A. | Suspended solids |
| B. | Dissolved organic matters |
| C. | Floating materials |
| D. | Solid impurities |
| Answer» C. Floating materials | |
| 43. |
What are the sources of plastics in the marine environment? |
| A. | Disposal by people |
| B. | Plastic Industry |
| C. | Thrown overboard by ships |
| D. | All of these |
| Answer» E. | |
| 44. |
Polychlorinated bipheyls are stable, insoluble in water and soluble in |
| A. | Water |
| B. | Oil |
| C. | acids |
| D. | Chemicals |
| Answer» C. acids | |
| 45. |
What does total solid include ? |
| A. | Total Solid Waste |
| B. | Total Dissolved Solids |
| C. | Total Suspended Solids |
| D. | Both b and c |
| Answer» E. | |
| 46. |
Effluents that comes from various industries such as food and drugs is known as |
| A. | Industrial Pollution |
| B. | Natural pollution |
| C. | Mining Pollution |
| D. | Municipal pollution |
| Answer» B. Natural pollution | |
| 47. |
The Black Sea has a one narrow connection with |
| A. | Mediterranean Basin |
| B. | Arabian Sea |
| C. | Arabian Gulf |
| D. | All of these |
| Answer» B. Arabian Sea | |
| 48. |
What are characteristics of 'domestic' wastewater ? |
| A. | Grey color, musty odour |
| B. | Blue color, odourless |
| C. | Green color, musty odour |
| D. | All of Above |
| Answer» C. Green color, musty odour | |
| 49. |
Settle out portion of 'sewage' is known as |
| A. | Dissolved solids |
| B. | Settleable Solids |
| C. | Colloidal Solids |
| D. | Suspended Solids |
| Answer» C. Colloidal Solids | |
| 50. |
Which bacteria can flourish and carry out decomposition of organic matter, both in presence and absence of oxygen? |
| A. | Facultative Bacteria |
| B. | Aerobic Bacteria |
| C. | Anaerobic Bacteria |
| D. | Blue green algae |
| Answer» B. Aerobic Bacteria | |