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. |
Fume are formed from condensation of |
| A. | Gaseous matter |
| B. | liquid particulate |
| C. | Solid material |
| D. | Smoke |
| Answer» D. Smoke | |
| 2. |
Acid deposition has been increasing in united states, since |
| A. | 1970s |
| B. | 2000 |
| C. | 1980s |
| D. | 1990s |
| Answer» B. 2000 | |
| 3. |
What does the term “liming” mean? |
| A. | Application of magnesium and calcium rich substances to soil |
| B. | Erosion of calcium carbonate(lime) zones in soil |
| C. | Excessive growth of lemon trees in acid rain prone regions |
| D. | None of the mentioned |
| Answer» B. Erosion of calcium carbonate(lime) zones in soil | |
| 4. |
In which atmospheric self cleansing process, large particles act as a receptor for smaller ones to form a unit? |
| A. | Flocculation |
| B. | Dispersion |
| C. | Self cleansing |
| D. | Gravitational Settling |
| Answer» B. Dispersion | |
| 5. |
How does lead affect the human body? |
| A. | Increases blood pressure |
| B. | Damages the cerebellum, liver and kidney |
| C. | Leads to reproductive disorders and osteoporosis |
| D. | All of the mentioned |
| Answer» E. | |
| 6. |
Which are the sources of arsenic pollution? |
| A. | Coal and petroleum |
| B. | Detergents and pesticides |
| C. | Mine tailings |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
Motor vehicles emit large quantities of CO, HCs, and |
| A. | Oxides of Nitrogen |
| B. | SOx |
| C. | NOx |
| D. | CO₂ |
| Answer» B. SOx | |
| 8. |
What does the aerodynamic diameter of an aerosol indicate? |
| A. | Size of the aerosol particle when floating in air |
| B. | Equivalent diameter of a sphere having same volume as that of the aerosol |
| C. | Average diameter of aerosol particles present in unit volume of air |
| D. | Maximum size of aerosol particle that can float in the air |
| Answer» C. Average diameter of aerosol particles present in unit volume of air | |
| 9. |
Spray are formed by atomization of parent liquids such as: |
| A. | Pesticides and herbicides |
| B. | liquid particulate |
| C. | Gaseous matters |
| D. | Solid matters |
| Answer» B. liquid particulate | |
| 10. |
What type of colloid is an aerosol? |
| A. | Solid in gas |
| B. | Gas in solid or fluid |
| C. | Fluid in gas |
| D. | Fluid or solid in gas |
| Answer» E. | |
| 11. |
What witnessed most disastrous volcanic eruption ? |
| A. | The U.S History |
| B. | The British History |
| C. | The France History |
| D. | The Somali History |
| Answer» C. The France History | |
| 12. |
What is the residence time (average time a particle is active in a given system) of carbon monoxide? |
| A. | 11-15 years |
| B. | 0.1-0.3 years |
| C. | 0.5 years |
| D. | Few minutes |
| Answer» C. 0.5 years | |
| 13. |
What would be temperature of gaseous hydrocarbon in condensation ? |
| A. | Higher temperature |
| B. | Lower temperature |
| C. | Normal temperature |
| D. | Extremely high temperature |
| Answer» C. Normal temperature | |
| 14. |
Which of the following gases is responsible for the yellowing of the Taj Mahal? |
| A. | Organic carbon |
| B. | Black carbon |
| C. | Brown carbon |
| D. | All of the mentioned |
| Answer» E. | |
| 15. |
Which is the most abundant hydrocarbon in the atmosphere? |
| A. | Methane |
| B. | Carbonyl sulphide |
| C. | Ethane |
| D. | None of the mentioned |
| Answer» B. Carbonyl sulphide | |
| 16. |
Which air pollutant is responsible for corrosion? |
| A. | Nox |
| B. | SO₂ |
| C. | Smog |
| D. | Lead |
| Answer» C. Smog | |
| 17. |
What does plant produce in bacterial decay of organic material ? |
| A. | Hydrogen sulphide gas |
| B. | Nitrogen gas |
| C. | Carbon gas |
| D. | Methane |
| Answer» B. Nitrogen gas | |
| 18. |
Which of the following analyser is used for oxygen analysis? |
| A. | Electrocatalytic |
| B. | Polarographic |
| C. | Conductive |
| D. | Amperometric |
| Answer» B. Polarographic | |
| 19. |
What pollutants causes in plants ? |
| A. | Diversity |
| B. | Growth |
| C. | degradation |
| D. | All of above |
| Answer» C. degradation | |
| 20. |
Impurities in paper absorb SO₂, converting it into |
| A. | H₂S |
| B. | H₂SO₄ |
| C. | Lead |
| D. | PAN |
| Answer» C. Lead | |
| 21. |
Nitrogen oxide' gas reacts with water to form |
| A. | Nitric Acid |
| B. | Nitrate |
| C. | Nitric Oxide |
| D. | Nitrogen oxide |
| Answer» B. Nitrate | |
| 22. |
Which particles are larger and heavier? |
| A. | Dust particles |
| B. | Settleable particles |
| C. | Smog particles |
| D. | Atmospheric particles |
| Answer» C. Smog particles | |
| 23. |
Which of the following constituent of photochemical smog causes the bronzing of plants? |
| A. | PBN |
| B. | PAN |
| C. | PFN |
| D. | Ketones |
| Answer» C. PFN | |
| 24. |
Hazardous pollutants are those pollutants for which air quality standards have been devised. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 25. |
What is cause of 'forest' decline? |
| A. | Acid loving moss |
| B. | Deforestation |
| C. | Pollution |
| D. | Climate Change |
| Answer» B. Deforestation | |
| 26. |
What causes dust production ? |
| A. | factories |
| B. | construction |
| C. | human activities |
| D. | Both b and c |
| Answer» E. | |
| 27. |
Below which of the following pH is rain regarded as ‘acid rain’? |
| A. | 7 |
| B. | 7.3 |
| C. | 5.6 |
| D. | 6 |
| Answer» D. 6 | |
| 28. |
In 1991, USA and Canada signed an agreement to reduce |
| A. | Carbon dioxide |
| B. | Sulfur Emissions |
| C. | Cobalt |
| D. | Nitrogen |
| Answer» C. Cobalt | |
| 29. |
What is 'adiabatic lapse' rate for wet air? |
| A. | 0.6C per 100meter |
| B. | 0.9C per 100meter |
| C. | 0.7C per 100meter |
| D. | 0.5C per 100meter |
| Answer» B. 0.9C per 100meter | |
| 30. |
Bacterial decomposition of organic matter, releases NO₂ into the |
| A. | Stratosphere |
| B. | Troposphere |
| C. | Atmosphere |
| D. | Biosphere |
| Answer» D. Biosphere | |
| 31. |
Primary pollutants in photochemical smog are nitric oxides and |
| A. | Hydrocarbons |
| B. | Fluorocarbons |
| C. | Hydrofluorocarbons |
| D. | Hydrocortone |
| Answer» B. Fluorocarbons | |
| 32. |
'Ozone' in stratosphere absorbs harmful |
| A. | Dust particles |
| B. | Radiations |
| C. | Fumes |
| D. | Air Pollutants |
| Answer» C. Fumes | |
| 33. |
What does the term “turbidity” indicate in atmospheric quality? |
| A. | Indicates density of clouds |
| B. | Reduction of light due to dust particles |
| C. | Indicates the humidity |
| D. | Turbulence of winds |
| Answer» C. Indicates the humidity | |
| 34. |
Mist' and 'spray' are |
| A. | Liquid particulates |
| B. | Solid particulates |
| C. | Air pollution |
| D. | Dust particles |
| Answer» B. Solid particulates | |
| 35. |
Acid deposition weakens plants by damaging their |
| A. | Leaves |
| B. | Roots |
| C. | Stems |
| D. | All of them |
| Answer» B. Roots | |
| 36. |
How does carbon monoxide affect the human body? |
| A. | It does not allow binding of oxygen with haemoglobin |
| B. | It reduces the surface area of the alveoli and disrupts gaseous transfers |
| C. | It causes the liver to malfunction, increasing bile secretion |
| D. | It reduces the body’s tendency to absorb water thereby making us feel dehydrated |
| Answer» B. It reduces the surface area of the alveoli and disrupts gaseous transfers | |
| 37. |
Which control measure is most effective way of controlling HC? |
| A. | Absorption |
| B. | Carbon Adsorption |
| C. | Condensation |
| D. | Incinertion |
| Answer» C. Condensation | |
| 38. |
Particle movement due to photophoresis depends on _________ |
| A. | Shape and size of the particle |
| B. | Optical properties of the particle |
| C. | Wavelength and intensity of incident light |
| D. | All of the mentioned |
| Answer» E. | |
| 39. |
Most common type of absorbent for H₂S removal is |
| A. | Lead |
| B. | ethanolamines |
| C. | Fluorides |
| D. | CO |
| Answer» C. Fluorides | |
| 40. |
Which of the following has the highest albedo? |
| A. | Water surface |
| B. | Plateau surfaces |
| C. | Vegetation |
| D. | Fresh snow |
| Answer» E. | |
| 41. |
Smog can be harmful for: |
| A. | Respiratory tract |
| B. | Urinary tract |
| C. | Digestive tract |
| D. | Spinocerebellar tract |
| Answer» B. Urinary tract | |
| 42. |
Clogging of stomata reduces intake of |
| A. | CO₂ |
| B. | H₂O |
| C. | NO₂ |
| D. | SO₂ |
| Answer» B. H₂O | |
| 43. |
Below what Richardson number does convective mixing start dominating mechanical turbulence? |
| A. | 0 |
| B. | -0.04 |
| C. | -0.03 |
| D. | -0.1 |
| Answer» C. -0.03 | |
| 44. |
Emission of CO and NO₂ are responsible for higher concentration of O₃ in the |
| A. | Stratosphere |
| B. | Troposphere |
| C. | Thermosphere |
| D. | Biosphere |
| Answer» C. Thermosphere | |
| 45. |
Aquatic and terrestrial animals need sulphur and nitrogen to |
| A. | Grow |
| B. | Transpire |
| C. | Evaporate |
| D. | Photosynthesis |
| Answer» B. Transpire | |
| 46. |
DMS stands for |
| A. | Demonstrative Mass Spectrometer |
| B. | Departmental Management System |
| C. | Departmental Momentum System |
| D. | Demostrative Mass System |
| Answer» B. Departmental Management System | |
| 47. |
Above which Richardson number does vertical mixing in winds disappear? |
| A. | 1 |
| B. | 0.25 |
| C. | 0.5 |
| D. | 0.75 |
| Answer» C. 0.5 | |
| 48. |
What causes settleable particulates to fall down ? |
| A. | Gravity |
| B. | Rain |
| C. | Sunlight |
| D. | Air |
| Answer» B. Rain | |
| 49. |
Size of particulate matter ranges from |
| A. | 0.02 to 100um diameters |
| B. | 0.07 to 100um diameters |
| C. | 0.01 to 100um diameters |
| D. | 0.04to 100um diameters |
| Answer» D. 0.04to 100um diameters | |
| 50. |
What is the effect of ozone on human respiratory system? |
| A. | It has higher affinity to bind with haemoglobin and does not allow binding of oxygen |
| B. | It causes the disfigurement of the alveoli reducing the surface area for gaseous transfer |
| C. | It damages lung tissues and aggravates asthma |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |