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. |
The mosquitoes bite and suck blood at |
| A. | Day time |
| B. | Night Time |
| C. | Any Time |
| D. | Morning time |
| Answer» C. Any Time | |
| 2. |
The black Sea has already suffered from serious ecological damage, which are |
| A. | Toxic Chemicals |
| B. | Pathogens |
| C. | Phosphorous and Nitrates |
| D. | All of these |
| Answer» E. | |
| 3. |
Thebalharzia worm grows, gets mature and mate inside the human body, specifically in |
| A. | Kidney or Bladder |
| B. | Lungs |
| C. | Small Intestine |
| D. | Large Intestine |
| Answer» B. Lungs | |
| 4. |
Malaria kills 3000 people |
| A. | Per Year |
| B. | Per Annum |
| C. | Per Day |
| D. | Per week |
| Answer» D. Per week | |
| 5. |
Temperature affects dillusion, sedimentation and |
| A. | Dispersion |
| B. | Reduction |
| C. | Suspended solids |
| D. | Degradation |
| Answer» B. Reduction | |
| 6. |
Which bacteria consumes organic matter as their food, and thus oxidizing it to stable end product? |
| A. | Viruses |
| B. | Aerobic Bacteria |
| C. | Anaerobic Bacteria |
| D. | Rotifers |
| Answer» C. Anaerobic Bacteria | |
| 7. |
'Aerobic' decomposition takes place in |
| A. | Two stages |
| B. | Three stages |
| C. | Four Stages |
| D. | Five stages |
| Answer» B. Three stages | |
| 8. |
Soil, silt washing from land surfaces, fertilizers, insecticides are known as |
| A. | Agricultural Pollution |
| B. | Mining Pollution |
| C. | Municipal Pollution |
| D. | Industrial Pollution |
| Answer» B. Mining Pollution | |
| 9. |
Organic matter, which can be decomposed by bacteria is known as |
| A. | Biodegradable organic matter |
| B. | Degradation |
| C. | Eutrophication |
| D. | Decomposers |
| Answer» B. Degradation | |
| 10. |
Low 'pH' of a sewage indicates its |
| A. | Septic Conditions |
| B. | Decomposition |
| C. | Inorganic solids |
| D. | Organic matters |
| Answer» B. Decomposition | |
| 11. |
What reduces water quality ? |
| A. | Temperature |
| B. | Nutrients |
| C. | Water Vapours |
| D. | Waste products |
| Answer» B. Nutrients | |
| 12. |
Cyanides are toxic to all biological life, prevents enzyme action, as well as immobilize the |
| A. | Lungs |
| B. | Skin |
| C. | Nervous System |
| D. | Heart |
| Answer» D. Heart | |
| 13. |
Primary treatment reduces bacterial load, ranges from |
| A. | 30-80% |
| B. | 20-75% |
| C. | 10-60% |
| D. | 90-100% |
| Answer» C. 10-60% | |
| 14. |
Phosphorous, is needed for the |
| A. | Growth |
| B. | Decomposition |
| C. | Photosynthesis |
| D. | Eutrophication |
| Answer» D. Eutrophication | |
| 15. |
'BOD' oxidized by bacteria, resulting oxidization is known as |
| A. | Biologically Degradable |
| B. | Biodiversity |
| C. | Nitrification |
| D. | Bacteria oxidize |
| Answer» D. Bacteria oxidize | |
| 16. |
Solubility of oxygen in water is directly proportional to |
| A. | Temperature |
| B. | Pressure |
| C. | Nutrients |
| D. | All of above |
| Answer» C. Nutrients | |
| 17. |
Algae grows less in |
| A. | High temperature |
| B. | Low temperature |
| C. | Cool Temperature |
| D. | All of these |
| Answer» B. Low temperature | |
| 18. |
Which marine pollution was tackled by UNEP? |
| A. | Shores of Black sea |
| B. | Mediterranean Basin |
| C. | Arabian Sea |
| D. | All of these |
| Answer» B. Mediterranean Basin | |
| 19. |
What does solid waste consist ? |
| A. | Mud |
| B. | Sand |
| C. | dust |
| D. | All of above |
| Answer» B. Sand | |
| 20. |
Over 75% of marine pollution comes from |
| A. | Land |
| B. | Oceans |
| C. | seas |
| D. | Coastal Areas |
| Answer» B. Oceans | |
| 21. |
What chemicals are used in loading, transit and accidental leakage from industrial storage ? |
| A. | Natural Pollution |
| B. | Mining Pollution |
| C. | Accidental Spillage |
| D. | Municipal pollution |
| Answer» D. Municipal pollution | |
| 22. |
Which metals are poisonous in drinking water? |
| A. | Lead |
| B. | Mercury |
| C. | Lead and Mercury |
| D. | Cadmium |
| Answer» D. Cadmium | |
| 23. |
How pathogenic organism impacts the marine life? |
| A. | Contaminates coastal Swimming Places |
| B. | Sea food |
| C. | spreading disease |
| D. | All of these |
| Answer» E. | |
| 24. |
When the dumping of radioactive waste was banned worldwide? |
| A. | 1987 |
| B. | 1988 |
| C. | 1982 |
| D. | 1999 |
| Answer» D. 1999 | |
| 25. |
Anaerobic decomposition is also known as |
| A. | Putrefaction |
| B. | Aerobic Oxidation |
| C. | Decomposition |
| D. | Degradation |
| Answer» B. Aerobic Oxidation | |
| 26. |
Cholera is an |
| A. | Kidney Disease |
| B. | Intestinal Infection |
| C. | Lung Disease |
| D. | Bladder Disease |
| Answer» C. Lung Disease | |
| 27. |
What compounds form fats and oils ? |
| A. | Carboxylic acids +Alcohol |
| B. | Carbon Compounds +water |
| C. | Carbon Dioxide + Alcohol |
| D. | Carbon Monoxide +Alcohol |
| Answer» B. Carbon Compounds +water | |
| 28. |
Domestic waste includes |
| A. | Detergents |
| B. | Metals |
| C. | Toxic chemicals |
| D. | All of these |
| Answer» E. | |
| 29. |
Which industry provides jobs in hotels, transport, shops, and making craft goods? |
| A. | Taxile |
| B. | Tourism |
| C. | Agriculture |
| D. | I.T companies |
| Answer» C. Agriculture | |
| 30. |
What percentage of earth consist of oceans? |
| A. | 91% |
| B. | 51% |
| C. | 71% |
| D. | 70% |
| Answer» D. 70% | |
| 31. |
Which bacteria flourish in presences of free dissolved oxygen in sewage? |
| A. | Aerobic Bacteria |
| B. | Anaerobic Bacteria |
| C. | Rotifers |
| D. | Virus |
| Answer» B. Anaerobic Bacteria | |
| 32. |
To transfer the disease, the mosquito must bite a person, whose blood already contains the malaria parasite, which is known as |
| A. | Plasmodium |
| B. | Water based Disease |
| C. | Decomposers |
| D. | scavengers |
| Answer» B. Water based Disease | |
| 33. |
Epidemics occurs, when water pipelines are disrupted after |
| A. | Natural Disasters |
| B. | Air Pollutions |
| C. | Fir explosion |
| D. | Famine |
| Answer» B. Air Pollutions | |
| 34. |
What causes bad odour in waste treatment plant? |
| A. | CO₂ |
| B. | CO |
| C. | H₂S |
| D. | PAN |
| Answer» D. PAN | |
| 35. |
What involved in wastewater final treatment ? |
| A. | BOD |
| B. | Chlorination |
| C. | Sedimentation |
| D. | All of above |
| Answer» C. Sedimentation | |
| 36. |
'Polychlorinated biphenyls' cause harm to |
| A. | Birds |
| B. | Animals |
| C. | Elephants |
| D. | Tigers |
| Answer» B. Animals | |
| 37. |
An example of industrial effluent toxic substance is |
| A. | Nitrogen |
| B. | Phosphorous |
| C. | Calcium |
| D. | Mercury |
| Answer» E. | |
| 38. |
Which bacteria flourish in absence of free dissolved oxygen in sewage? |
| A. | Anaerobic Bacteria |
| B. | Aerobic Bacteria |
| C. | Rotifers |
| D. | Blue green algae |
| Answer» B. Aerobic Bacteria | |
| 39. |
Soil, sand and other solids are washed into water bodies due to |
| A. | Soil Erosion |
| B. | Eutrophication |
| C. | Desertification |
| D. | Deforestation |
| Answer» B. Eutrophication | |
| 40. |
Human faeces is main source of organism, in |
| A. | Air |
| B. | Water |
| C. | Atmosphere |
| D. | Forests |
| Answer» C. Atmosphere | |
| 41. |
Pesticide pollution is due to 'leachate' from agricultural and |
| A. | Forests |
| B. | Horticultural land |
| C. | Mountainous areas |
| D. | All of above |
| Answer» C. Mountainous areas | |
| 42. |
Which organism respire in absence of oxygen ? |
| A. | Facultative Anaerobe |
| B. | Bacteria |
| C. | Obligate Aerobe |
| D. | All of above |
| Answer» D. All of above | |
| 43. |
Microbiological pollutants, cause sickness in humans, known as |
| A. | Pathogenic organism |
| B. | Decomposers |
| C. | Eutrophication |
| D. | All of above |
| Answer» B. Decomposers | |
| 44. |
Organic solids consists of carbohydrates, fats and |
| A. | waste |
| B. | Oil |
| C. | Gases |
| D. | Liquids |
| Answer» C. Gases | |
| 45. |
Water pollution due to tailing from ore washing and Sinert suspended solids, known as |
| A. | Industrial Pollution |
| B. | Municipal Pollution |
| C. | Mining Pollution |
| D. | Natural Pollution |
| Answer» D. Natural Pollution | |
| 46. |
Organic pollutants are discharged as a municipal sewage and |
| A. | Industrial effluents |
| B. | Mining Pollution |
| C. | Natural pollution |
| D. | Artificial Pollution |
| Answer» B. Mining Pollution | |
| 47. |
Method by which a dissolved oxygen is determined, known as |
| A. | Microorganism |
| B. | Decomposition |
| C. | Winkler method |
| D. | All of above |
| Answer» D. All of above | |
| 48. |
What affect does Ph have on enzyme ? |
| A. | Change Shape |
| B. | Change Charge Properties |
| C. | Let Undergo Catalysis |
| D. | Both a and b |
| Answer» D. Both a and b | |
| 49. |
Finely divided solid, remaining either with in solution or in suspension is known as |
| A. | Settaleable Solids |
| B. | Dissolved Solids |
| C. | Suspended solids |
| D. | Colloidal Solids |
| Answer» E. | |
| 50. |
Composition of sewage water depends on its |
| A. | Nutrient |
| B. | Sources |
| C. | water content |
| D. | Sunlight |
| Answer» C. water content | |