Tag: evs

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Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

An increase in content of carbon dioxide in environment will not cause:

  1. more heat to be retained by environment

  2. increase in photosynthesis of plants

  3. global warming

  4. abundance of desert plants
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Explanation

An increase in content of carbon dioxide in an environment will not cause increase in photosynthesis of plants and abundance of desert plants.

Carbon dioxide is a greenhouse gas, so it traps the heat radiation and causes greenhouse effect.
Increase in concentration of green house gas will result in increase in average temperature of the earth. Thus it causes global warming.

Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

The problems for criticism about large dams are that they:

  1. contribute enormously to deforestation and the loss of biological diversity

  2. displace large number of peasants and trebles without proper rehabilitation

  3. swallow up huge amounts of public money without the generation of proportionate benefits

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Large dams are often criticized for environmental degradation (deforestation), social issues (displacement of communities without proper rehabilitation), and economic inefficiency (high costs vs. benefits).

Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

Chipko Andolan is concerned with :

  1. conservation of natural resources

  2. development of new breeds of forest plants

  3. zoological survey of India

  4. forest conservation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the 1970s, an organized resistance to the destruction of forests spread throughout India and came to be known as the Chipko movement. The name of the movement comes from the word 'embrace', as the villagers hugged the trees, and prevented the contractors' from felling them.

Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

Which one of the following is not an ideal solution for tackling water shortages?

  1. Controlling population growth

  2. Conserving water in irrigation

  3. Controlling water pollution

  4. Drilling large number of deep bore wells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Drilling large number of deep bore wells,

It is not an ideal solution for tackling water shortage.
Rain water harvesting and ground water recharging is the need of the hour. Roof top rain water harvesting are being taken up in urban areas. In roof top harvesting u r to collect rain water and  using a filter clean it, then send it to the aquifer through a tube well or dug well. In open field u can recharge ground water storing the rain water in numerous tanks, ponds, contour  trench etc disallowing the rain water to drain to river and finally to ocean. If  tube wells are drilled inside the tanks and  ponds, more rain water can be recharged into the aquifer.

Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

Floods can be prevented by:

  1. afforestation

  2. cutting the forests

  3. filling the land

  4. removing the top soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Afforestation means planting trees. 

As we know, the roots of the trees help to hold soil layer firmly.

It is evident that it helps not to make soil loose and prevents erosion. Thus, by planting more and more trees, the top layer of soil becomes less prone to erosion by wind, water or anything likely. 

Thus, it prevents erosion and helps in soil conservation.

Afforestation involves the planting of trees in a drainage basin to increase interception and storage while reducing surface runoff. This reduces a rivers discharge and so makes it less likely to flood.

Option A is correct.
Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

Which of the following is a recently originated problem of environment?

  1. Global warming

  2. Ozone depletion

  3. Greenhouse effect

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Global warming, also referred to as climate change, is the observed century-scale rise in the average temperature of the Earth's climate system  and its related effects.

Ozone layer depletion is simply the wearing out (reduction) of the amount of ozone in the stratosphere. Unlike pollution, which has many types and causes, ozone depletion has been pinned down to one major human activity. 

Depletion begins when CFC's get into the stratosphere.

The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere.

Hence the option D is correct.
Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

When we consider the conservation of forests, we need to look at the :

  1. people who are humanists and conscious about human rights

  2. industrialists who use the various forests produce

  3. the people who live in or around forests

  4. the forest department of the Government, the industrialists and the people who live in or around forests
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The option D is correct.

Some of the steps we can take to conserve our forest resources are as follows :

Regulated and Planned Cutting of Trees.

Control over Forest Fire.

Reforestation and Afforestation.

Protection of Forests.

Proper utilisation of Forest and Forests Products.
Multiple choice evs how to save fuel define fossil fuels conservation of fuels reason for finishing of materials (resources) fuel and conservation

Way we consume these renewable resources, it affects their :

  1. efficiency

  2. power

  3. availability

  4. cost
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The more we consume renewable sources lesser they become available in our lifetime. 


So, the way we consume these renewable sources, it affects their availability.

Hence the option C is correct.