Environment & Biodiversity MCQs
Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.
41. Which of the following refers to reducing the impact on climate change by reducing greenhouse gas production especially CO2 , without lowering their standard of living?
[A] Carbon Footprint
[B] Carbon diet
[C] Greenhouse debt
[D] Biocapacity
Show Answer
Correct Answer: B [Carbon diet]
Notes:
Carbon Diet refers to reducing the impact on climate change by reducing greenhouse gas production especially CO2 , without lowering their standard of living. A low-carbon diet involves making lifestyle choices related to food consumption which reduce resulting greenhouse gas emissions (GHGe).
42. Which of the following statements are correct regarding Biocapacity?
1. It refers to capacity of an area to provide resources and absorb wastes at the same time.
2. When an area’s ecological footprint exceeds its biocapacity it results into unsustainability.
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Biocapacity refers to capacity of an area to provide resources and absorb wastes at the same time. When an area’s ecological footprint exceeds its biocapacity it results into unsustainability.
43. Which of the following is a vehicle that doesn’t emit tailpipe pollutants from the onboard source of power?
[A] BS VI vehicles
[B] Electric Vehicles
[C] ZEV vehicles
[D] Power vehicles
Show Answer
Correct Answer: C [ZEV vehicles]
Notes:
Zero emission vehicles which are also called as ZEV’s are those vehicles that do not emit any tailpipe pollutants such as carbon monoxide, carbon dioxide from the onboard source of power.
44. The Ozone-Depleting Substances (ODS) are found in which of the following layer of atmosphere ?
[A] Troposphere
[B] Stratosphere
[C] Mesosphere
[D] Ionosphere
Show Answer
Correct Answer: B [Stratosphere]
Notes:
The Ozone-Depleting Substances are Chlorofluorocarbons, HCFCs and Halons which are responsible for the depletion of ozone layer. These substances when transferred to Stratosphere cause the depletion of ozone layer.
45. Which of the following three ‘R’s are regarded as environment friendly?
[A] Reduce, Reuse, Recycle
[B] Read, Register, Recall
[C] Reduce, Rebuild, Restrict
[D] Random, Reduce, Recall
Show Answer
Correct Answer: A [Reduce, Reuse, Recycle]
Notes:
The three R’s of eco-friendly living are: Reduce, Reuse and Recycle. They all help to cut down on the amount of waste, we throw away. They conserve natural resources, landfill space and energy.
46. What was the main aim of Ramsar Convention?
[A] Bio-diversity Conservation
[B] Global Warming
[C] Conservation of wetlands
[D] Climate Change
Show Answer
Correct Answer: C [Conservation of wetlands]
Notes:
The Convention on Wetlands, called the Ramsar Convention, is an intergovernmental treaty that provides the framework for national action and international cooperation for the conservation and wise use of wetlands and their resources. It is named after the city of Ramsar in Iran, where the Convention was signed in 1971.
47. Addition excessive amounts of heat to a lake is referred to as _____:
[A] Thermal pollution
[B] Heat Bloom
[C] Green House effect
[D] Refrigeration effect
Show Answer
Correct Answer: A [Thermal pollution]
Notes:
Thermal pollution is defined as the addition of excess of undesirable heat to water thereby making it harmful to man, animal or aquatic life. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. The change in ambient temperature of water decreases oxygen supply and affects ecosystem composition.
48. The ambient air is stable when the ambient lapse rate is _____:
[A] Neutrally stable
[B] Sub-adiabatic
[C] Hyper-adiabatic
[D] Super-adiabatic
Show Answer
Correct Answer: B [Sub-adiabatic]
Notes:
If the environmental lapse rate is greater than – 5.5 K/km, then there is some small amount of vertical turbulence and the atmosphere is said to be stable. It is also referred to as being sub-adiabatic.
49. Absence of fish along a river indicates _____:
[A] Zone of active decomposition
[B] Zone of degradation
[C] Zone of recovery
[D] All zones of pollution
Show Answer
Correct Answer: B [Zone of degradation]
Notes:
Absence of fish along a river indicates zone of degradation. This zone is found for a certain length just below the point where sewage is discharged into the river-stream. This zone is characterised by water becoming dark and turbine with formation of sludge deposits at the bottom. D.O is reduced to about 40% of the saturated value.
50. Which of the following Colour coded weather alert is issued by IMD when there is a chance of more than 20 cm rainfall in 24 hours?
[A] Green
[B] Orange
[C] Red
[D] Yellow
Show Answer
Correct Answer: C [Red]
Notes:
The Indian Meteorological Department (IMD) uses a color-coded alert system for weather events. A green alert indicates no action is required. A yellow alert signals potential rainfall of 6-11 cm in 24 hours, while an orange alert indicates heavy rainfall of 6-20 cm. A red alert warns of extremely heavy rainfall exceeding 20 cm in a 24-hour period.
