MCQOPTIONS
Saved Bookmarks
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. |
Which type of particulate is condensed form of vapours? |
| A. | Mist |
| B. | Dust |
| C. | Fumes |
| D. | Smoke |
| Answer» D. Smoke | |
| 2. |
Which hydrocarbon is biologically active and potentially carcinogenic? |
| A. | Aliphatic hydrocarbon |
| B. | Aromatic hydrocarbon |
| C. | Alkenes hydrocarbon |
| D. | Alkynes hydrocarbon |
| Answer» C. Alkenes hydrocarbon | |
| 3. |
The stability of the stratosphere is due to which of the following reasons? |
| A. | Absorption of solar energy by ozone layer |
| B. | Strong wind currents |
| C. | Pressure is minimal |
| D. | All of the mentioned |
| Answer» B. Strong wind currents | |
| 4. |
Which gas helps in raising equilibrium temperature of earth? |
| A. | CO₂ |
| B. | Methane |
| C. | Argon |
| D. | Oxygen |
| Answer» C. Argon | |
| 5. |
In plants, acid leach, important elements in soil, resulting in reduced |
| A. | Photosynthesis |
| B. | Growth |
| C. | Evaporation |
| D. | Transpiration |
| Answer» C. Evaporation | |
| 6. |
Major source of emissions in a motor vehicle: crackcase, carburettors, fuel tank and |
| A. | Crackcase |
| B. | Fuel tank |
| C. | The engine exhaust |
| D. | All of above |
| Answer» E. | |
| 7. |
Which of the following is not an adsorbent? |
| A. | Molecular sieves |
| B. | Activated carbon |
| C. | Activated alumina |
| D. | Water |
| Answer» E. | |
| 8. |
'Methane' is a naturally accruing |
| A. | Hydrocarbons |
| B. | Bicarbonates |
| C. | Oxides |
| D. | Sulphates |
| Answer» B. Bicarbonates | |
| 9. |
Which of the following is the current major contributor to lead air pollution? |
| A. | Motor vehicles |
| B. | Metal processing centres |
| C. | Waste incinerators |
| D. | Lead acid battery manufacturing units |
| Answer» C. Waste incinerators | |
| 10. |
'TLV' stands for |
| A. | Temperature limit value |
| B. | Threshold Limit Value |
| C. | Tropical limit value |
| D. | Time Limit value |
| Answer» C. Tropical limit value | |
| 11. |
NDUV monitors use a reference gas to analyse other gases. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 12. |
Which is/are the most significant air-borne allergen(s)? |
| A. | Fungi |
| B. | Pollen |
| C. | Soot |
| D. | All of the mentioned |
| Answer» C. Soot | |
| 13. |
Effect of O₃ in plants, involve: |
| A. | Stomata burning |
| B. | Oxidizing burning |
| C. | Reduced survival |
| D. | All of above |
| Answer» E. | |
| 14. |
Term aerosol is not applicable, if particles settle down in |
| A. | Atmosphere |
| B. | Air |
| C. | Liquid and Solid surface |
| D. | Water |
| Answer» D. Water | |
| 15. |
What is adiabatic lapse rate for dry air? |
| A. | 3.98C per 100meter |
| B. | 2.98C per 100meter |
| C. | 0.98C per 100meter |
| D. | 1.98C per 100meter |
| Answer» D. 1.98C per 100meter | |
| 16. |
70% of sulphur dioxide comes from: |
| A. | Industries |
| B. | Coal power plants |
| C. | Vehicles |
| D. | Domestic cooking |
| Answer» C. Vehicles | |
| 17. |
Biological particles survive in atmosphere for short period of time due to lack of |
| A. | Dust particles |
| B. | Moisture |
| C. | Nutrients |
| D. | Smog |
| Answer» D. Smog | |
| 18. |
'Nitric acid' reacts with ozone, resulting in removal of |
| A. | O₃ |
| B. | CO |
| C. | CO₂ |
| D. | NOX |
| Answer» B. CO | |
| 19. |
When light is passed through a suspension, it’s intensity decreases due to _________ |
| A. | Both scattering and diffraction |
| B. | Both diffraction and absorption |
| C. | Absorption only |
| D. | Both scattering and absorption |
| Answer» E. | |
| 20. |
Photochemical smog, an oxidizing smog, having a high concentration of |
| A. | Reactants |
| B. | Oxidants |
| C. | NOX |
| D. | SOx |
| Answer» C. NOX | |
| 21. |
What makes a Leather weak and disintegrates ? |
| A. | Nox |
| B. | SO₂ |
| C. | CO |
| D. | CO₂ |
| Answer» C. CO | |
| 22. |
Acidification of surface water is responsible for decline in population of |
| A. | Eagles |
| B. | Birds |
| C. | Fishes |
| D. | Black ducks |
| Answer» B. Birds | |
| 23. |
What impairs germination of spruce seeds? |
| A. | Acid deposition |
| B. | CFCs |
| C. | O₃ |
| D. | Eutrophication |
| Answer» B. CFCs | |
| 24. |
Which aliphatic hydrocarbon does not active in atmospheric photochemical reaction? |
| A. | Alkenes |
| B. | Alkynes |
| C. | PAN |
| D. | Aromatics |
| Answer» B. Alkynes | |
| 25. |
What is causes of increase in CO₂? |
| A. | Volcanic Eruption |
| B. | Deforestation |
| C. | Photosynthesis |
| D. | Burning of fossil fuel |
| Answer» E. | |
| 26. |
Clean rain water has a pH value between 5 to 6, which makes it slightly |
| A. | Acidic |
| B. | Basic |
| C. | Neutral |
| D. | Alkaline |
| Answer» B. Basic | |
| 27. |
What are the sources of air pollutants in the atmosphere? |
| A. | Coal fired power station |
| B. | Vehicles exhausts/Coal fire power plants |
| C. | Industries |
| D. | Coal |
| Answer» D. Coal | |
| 28. |
Snow and rain in the industrial north east of USA have been known as the pH of |
| A. | 2 to 1 |
| B. | 2 to 4 |
| C. | 3 to 6 |
| D. | 2 to 5 |
| Answer» B. 2 to 4 | |
| 29. |
In the atmosphere, what carries the air pollutants to other places and other countries? |
| A. | Waves |
| B. | Prevailing winds |
| C. | Water |
| D. | Sunlight |
| Answer» C. Water | |
| 30. |
What are the main sources of Nitrogen oxide and Sulphur oxides? |
| A. | Burning of coal |
| B. | Nuclear Energy |
| C. | CFCs |
| D. | Fossil Fuel |
| Answer» B. Nuclear Energy | |
| 31. |
Which of the following compounds was earlier produced for the utility of transformers? |
| A. | PDD |
| B. | PCDF |
| C. | PCB |
| D. | TCDD |
| Answer» D. TCDD | |
| 32. |
What does installation of scrubbers can reduce ? |
| A. | Sulfur oxide emission |
| B. | Nitrogen |
| C. | Carbon dioxide |
| D. | Chlorofluorocarbon |
| Answer» B. Nitrogen | |
| 33. |
Which gas is produced by reduction of sulphur? |
| A. | CO |
| B. | CO₂ |
| C. | H₂S |
| D. | Nox |
| Answer» D. Nox | |
| 34. |
What does incomplete combustion produce ? |
| A. | Carbon monoxide |
| B. | Carbon dioxide |
| C. | Sulfur monoxide |
| D. | Non Combustible particles |
| Answer» B. Carbon dioxide | |
| 35. |
What is the reason behind the yellow colour of smog? |
| A. | Nitrogen dioxide |
| B. | Sulphur dioxide |
| C. | Sulphate ions |
| D. | Nitrate ions |
| Answer» D. Nitrate ions | |
| 36. |
What does needles and leaves develop ? |
| A. | Black spots |
| B. | Green spots |
| C. | White spots |
| D. | Brown spots |
| Answer» E. | |
| 37. |
When did new york legislation passed a bill to reduce sulfur emission ? |
| A. | 1991 |
| B. | 1997 |
| C. | 1990 |
| D. | 1992 |
| Answer» B. 1997 | |
| 38. |
NDUV analysis is also known as the differential absorption. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 39. |
What is average annual pH of rain in new hampshire ? |
| A. | 8 to 9 |
| B. | 4 to 4.21 |
| C. | 1 to 2 |
| D. | 7 |
| Answer» C. 1 to 2 | |
| 40. |
Where does salamander breaded ? |
| A. | Glacial |
| B. | Melted snow |
| C. | Oceans |
| D. | Rivers |
| Answer» C. Oceans | |
| 41. |
When temperature of ambient air increases with altitude, lapse rate becomes negative, process is known as |
| A. | Negative lapse rate |
| B. | Inversion |
| C. | Version |
| D. | Lapse rate |
| Answer» C. Version | |
| 42. |
COHb stands for |
| A. | Carbonmonoglobin |
| B. | Carboxyhemoglobin |
| C. | Carbonmonooxide |
| D. | Carbon dioxide |
| Answer» C. Carbonmonooxide | |
| 43. |
What makes black forest damaged by pollutants ? |
| A. | Feron I |
| B. | CFCs |
| C. | Automobiles |
| D. | PAN |
| Answer» D. PAN | |
| 44. |
The effective height of stack is given by ___________ |
| A. | Plume height / Actual height of the stack |
| B. | Plume height * Actual height of the stack |
| C. | Plume height – Actual height of the stack |
| D. | Plume height + Actual height of the stack |
| Answer» E. | |
| 45. |
Which of these is NOT a primary pollutant? |
| A. | Carbon monoxide |
| B. | Carbon dioxide |
| C. | Ground level ozone |
| D. | Oxygen |
| Answer» E. | |
| 46. |
What percentage of pollutants is gaseous in nature? |
| A. | 75% |
| B. | 80% |
| C. | 99.9% |
| D. | 90% |
| Answer» E. | |
| 47. |
What is included in anthropogenic particulates ? |
| A. | Viruses |
| B. | Pollen |
| C. | Metallic fumes |
| D. | Bacteria |
| Answer» D. Bacteria | |
| 48. |
In humans fine particles, penetrate deep into the |
| A. | Brain |
| B. | Heart |
| C. | Lungs |
| D. | Skin |
| Answer» D. Skin | |
| 49. |
In rural areas, what has contributed significantly to particulate pollution? |
| A. | Incomplete combustion in vehicles |
| B. | Using wood for fire and cooking |
| C. | Fertilisers |
| D. | All of the mentioned |
| Answer» C. Fertilisers | |
| 50. |
Volcanoes' and 'natural firs' are natural sources of |
| A. | Cl |
| B. | HCl |
| C. | Nitric Oxide |
| D. | Sulphur Oxide |
| Answer» E. | |