Questions and answers for exam Preparation

MCQs

Total Questions : 20 | Page 1 of 2 pages

Question 1. Which of the following is not a major positive feedback mechanism in which the activity of humans to increase global climate temperatures leads to an even further increase?

Tropical deforestation causes warming and drying so that remaining forests begin to decline
Global warming causes snow to melt in polar regions and therefore increases global albedo
Global warming causes increased CO2 release from biomass decomposition
Global warming causes increased rainfall, plant growth and photosynthesis

Discuss Question

Answer: Option D. -> Global warming causes increased rainfall, plant growth and photosynthesis
:
D

Question 2. The stage in which the biological processes is used to purify water in a wastewater treatment plants is called

secondary sewage treatment
primary sewage treatment
wastewater reduction
biochemical reduction

Discuss Question

Answer: Option A. -> secondary sewage treatment
:
A

Question 3. Which of the following is not one of the major environment problems resulting from human interference in the nitrogen cycle?

Nitrous oxide release increases global warming
Stratospheric ozone depletion
Increased acid rain
Eutrophication

Discuss Question

Answer: Option B. -> Stratospheric ozone depletion
:
B

Question 4. Groundwater mining in coastal areas can result into

increase in the salinity of groundwater
decrease in the toxicity of groundwater
decrease in the salinity of groundwater
increase in the water table
none of the above

Discuss Question

Answer: Option A. -> increase in the salinity of groundwater
:
A

Question 5. Which of the following is negative effects on the soil and water due to conventional, mechanized farming practices?

soil compaction
reduction in soil organic matter
leaching of pesticides and fertilizers into the groundwater
all of the above
none of the above

Discuss Question

Answer: Option D. -> all of the above
:
D

Question 6. The 1987 Montreal Protocol was signed for which of the following reasons?

To stop the global trade in products made from endangered tigers
To phase out the use of CFC's, found to be causing depletion of the ozone layer
To ban nuclear testing in tropical oceans
To begin converting from fossil fuel use to more renewable energy sources to reduce the anthropogenic greenhouse effect

Discuss Question

Answer: Option B. -> To phase out the use of CFC's, found to be causing depletion of the ozone layer
:
B

Question 7. Approximately what proportion of the global land surface is used for agriculture and grazing by the world's 6 billion people?

One tenth
One third
One eightieth
Three quarters

Discuss Question

Answer: Option B. -> One third
:
B

Question 8. Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?

Damage to eyes
Reduced immune system
Increased skin cancer
Increased liver cancer

Discuss Question

Answer: Option C. -> Increased skin cancer
:
C

Question 9. What was the focus of Rachel Carson's book Silent Spring in 1962?

The potential ecological devastation of pesticides such as DDT in the ecosystem
Economic and social chaos resulting from a computer virus under a society with an over-concentration on technology and computers
Rapid global warming resulting from fossil fuel burning and deforestation
The potential for resource depletion leading to global poverty and starvation from increasing population growth

Discuss Question

Answer: Option A. -> The potential ecological devastation of pesticides such as DDT in the ecosystem
:
A

Question 10. Which of the following is not a major greenhouse gas?