MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 42 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Identify the correct statement regarding Electrostatic precipitator. |
| A. | Minimum particle size removal is <0.5μm |
| B. | They can be operated at high temperature |
| C. | It has low maintenance cost |
| D. | It does not cause any freezing problem |
| Answer» C. It has low maintenance cost | |
| 2. |
Ocean is a source for carbon monoxide. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
In which of the following plumes, unstable condition prevails? |
| A. | Trapping |
| B. | Fanning |
| C. | Looping |
| D. | Neutral |
| Answer» D. Neutral | |
| 4. |
How does increase in temperature affect air pollution? |
| A. | Higher temperatures reduce air pollution |
| B. | Higher temperatures increase air pollution |
| C. | Temperature does not affect the air pollution levels |
| D. | Humidity factor is also necessary to predict variance of air pollution with temperature |
| Answer» C. Temperature does not affect the air pollution levels | |
| 5. |
What does PAH stand for in terms of organic chemistry? |
| A. | Polynuclear Aromatic Hydrocarbons |
| B. | Polyethylene Acetic Hydride |
| C. | Polycyclic Acetic Hydrocarbons |
| D. | Polynuclear Aromatic Hydrides |
| Answer» B. Polyethylene Acetic Hydride | |
| 6. |
The permissible concentration of PM 10 in the air is |
| A. | 60μg/m3 |
| B. | 40μg/m3 |
| C. | 50μg/m3 |
| D. | 20μg/m3 |
| Answer» B. 40μg/m3 | |
| 7. |
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 | |
| 8. |
State whether the following statement is true or false.The wet adiabatic rate is greater than the dry adiabatic rate. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
In-situ in-stack analysers are used for measuring concentrations of which of the following gases? |
| A. | Ammonia |
| B. | Sulphur dioxide |
| C. | Nitrogen monoxide |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
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 | |
| 11. |
Which of the following gases vary significantly over time and place at the atmospheric boundary level? |
| A. | Carbon dioxide |
| B. | Ozone |
| C. | Water vapour |
| D. | Oxygen |
| Answer» D. Oxygen | |
| 12. |
When environmental Lapse Rate (ELR) is less is than Adiabatic Lapse Rate (ALR), then which of the following occurs? |
| A. | Sub adiabatic lapse rate |
| B. | Super adiabatic lapse rate |
| C. | Neutral lapse rate |
| D. | Adiabatic lapse rate |
| Answer» B. Super adiabatic lapse rate | |
| 13. |
In-situ cross stack analysers work behind which of the following principles? |
| A. | Differential absorption spectroscopy |
| B. | Gas-filter correlation spectroscopy |
| C. | Differential absorption & Gas-filter correlation spectroscopy |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
Which of the following belongs to class of extremely toxic dioxin compound(s)? |
| A. | Polychlorinated dibenzo-p-dioxins |
| B. | Polychlorinated dibenzofurans |
| C. | Polychlorinated biphenyls |
| D. | All of the mentioned |
| Answer» E. | |
| 15. |
Which of the following plants is extremely sensitive towards sulphur dioxide? |
| A. | Onion |
| B. | Potato |
| C. | Corn |
| D. | Tomato |
| Answer» E. | |
| 16. |
Which of the following is a source for boron air pollution? |
| A. | Rockets and jets |
| B. | Automobiles |
| C. | Soap industries |
| D. | Refrigerants |
| Answer» B. Automobiles | |
| 17. |
What range of air quality index has the most severe impact on human health? |
| A. | 101-200 |
| B. | 201-300 |
| C. | 301-400 |
| D. | 401-500 |
| Answer» E. | |
| 18. |
What is a 'tetroon' in the field of meteorology? |
| A. | A tool used to study wind patterns |
| B. | A tool used to study pressure variations |
| C. | A tool used to study temperature deviations |
| D. | A tool used to study humidity |
| Answer» B. A tool used to study pressure variations | |
| 19. |
TCDD is a human carcinogen. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 20. |
How does atmospheric pressure vary with increase in altitude? |
| A. | It decreases linearly |
| B. | It decreases exponentially |
| C. | It increases linearly |
| D. | It increases till stratosphere and then starts decreasing exponentially |
| Answer» C. It increases linearly | |
| 21. |
Which of the following is the correct expression of the height of chimney emitting sulfur dioxide? |
| A. | HC = 74 Kp0.27 |
| B. | HC = 14 Kp0.33 |
| C. | HC = 14 Kp0.47 |
| D. | HC = 74 Kp0.33 |
| Answer» C. HC = 14 Kp0.47 | |
| 22. |
Which of the mentioned devices are used for removing vapour phase/ gaseous pollutants? |
| A. | Absorption towers |
| B. | Catalytic converters |
| C. | Thermal oxidisers |
| D. | All of the mentioned |
| Answer» E. | |
| 23. |
What is the minimum height of the chimney in a thermal power plant of capacity 350MW? |
| A. | 100m |
| B. | 220m |
| C. | 380m |
| D. | 60m |
| Answer» C. 380m | |
| 24. |
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 | |
| 25. |
Which of the following analyser is used for oxygen analysis? |
| A. | Electrocatalytic |
| B. | Polarographic |
| C. | Conductive |
| D. | Amperometric |
| Answer» B. Polarographic | |
| 26. |
Pesticides also contribute to air pollution along with polluting underground reservoirs. True or false? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 27. |
The chimney is emitting particulate matter. Which of the following is the correct expression of the height of the chimney? Here 'Kp' represents the emission of particulate matter. |
| A. | HC = 74 Kp0.27 |
| B. | HC = 14 Kp0.27 |
| C. | HC = 14 Kp0.47 |
| D. | HC = 74 Kp0.33 |
| Answer» B. HC = 14 Kp0.27 | |
| 28. |
What does the term obliquity indicate? |
| A. | Earth's axial tilt of 23.5 degrees |
| B. | Alignment of the Earth's internal magnetic field |
| C. | Analysis of ocean currents |
| D. | Pressure variation over different seasons |
| Answer» B. Alignment of the Earth's internal magnetic field | |
| 29. |
When Environmental Lapse Rate (ELR) is greater than Adiabatic Lapse Rate (ALR), then which of the following occurs? |
| A. | Sub adiabatic lapse rate |
| B. | Super adiabatic lapse rate |
| C. | Neutral lapse rate |
| D. | Adiabatic lapse rate |
| Answer» C. Neutral lapse rate | |
| 30. |
Which is the largest-volume manufactured organic chemical? |
| A. | Ethylene |
| B. | Ethane |
| C. | Formaldehyde |
| D. | Carbonic acid |
| Answer» B. Ethane | |
| 31. |
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. | |
| 32. |
What does the word 'meteorology' define? |
| A. | Study of meteors and asteroids |
| B. | Study of measurements and instruments |
| C. | Study of chemical properties of metals |
| D. | Study of the weather and atmospheric changes |
| Answer» E. | |
| 33. |
Non-Dispersive Ultraviolet (NDUV) analysers are primarily used to detect which of the following two gases? |
| A. | Oxygen and Carbon Dioxide |
| B. | Oxygen and Nitrogen Dioxide |
| C. | Nitrogen Dioxide and Sulphur Dioxide |
| D. | Sulphur Dioxide and Oxygen |
| Answer» D. Sulphur Dioxide and Oxygen | |
| 34. |
Which of the following is not a part of photochemical smog? |
| A. | NO2 |
| B. | O3 |
| C. | PAN |
| D. | SPM |
| Answer» E. | |
| 35. |
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 | |
| 36. |
Which plant helps in detection of pollution from automobile exhaust? |
| A. | Neem |
| B. | Tulsi |
| C. | Lichen |
| D. | Lettuce |
| Answer» C. Lichen | |
| 37. |
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. | |
| 38. |
What is the disadvantage of using conductometric analysers? |
| A. | Low sensitivity |
| B. | Interfering gases must be removed before monitoring process |
| C. | Medium used to measure change in conductivity is expensive |
| D. | All of the mentioned |
| Answer» C. Medium used to measure change in conductivity is expensive | |
| 39. |
Which are the two forces balanced by the geostrophic wind? |
| A. | Coriolis effect and pressure gradient force |
| B. | Coriolis force and centrifugal force |
| C. | Frictional force and pressure gradient force |
| D. | Pressure gradient force and centrifugal force |
| Answer» B. Coriolis force and centrifugal force | |
| 40. |
The minimum particle size removes by gravitational chamber is |
| A. | >50μm |
| B. | >10μm |
| C. | >25μm |
| D. | >0.5μm |
| Answer» B. >10μm | |
| 41. |
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 | |
| 42. |
What is the full form of The Abbreviation VOC in Air Pollution? |
| A. | Versatile Oxygenated Compounds |
| B. | Volatile Oxygenated Compounds |
| C. | Volatile Organic Carbons |
| D. | Volatile Organic Compounds |
| Answer» E. | |