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Environment & EcologyEasyAsked in: RRB JE · 22 May 2019, Shift 1

The underground water due to the hot rocks present inside the Earth ____________which can turn the turbines of generators to produce electricity.

  1. A.Turns to ice
  2. B.Turns to steam at high pressure
  3. C.Cools down
  4. D.Flows out

Correct answer

B. Turns to steam at high pressure

Explanation

The correct answer is B, Turns to steam at high pressure. This describes geothermal energy. Molten rock pushed up from deep inside the Earth collects as hot spots at shallower depths, and groundwater trapped near them is heated until it becomes steam under high pressure. When a pipe is sunk into such a hot spot the trapped steam rushes up, and its pressure is used to turn the turbine of a generator, giving electricity without any fuel. New Zealand, Iceland and the United States use this source on a large scale, and in India the Puga valley in Ladakh and Tattapani in Chhattisgarh are the best known sites. A is wrong because heat cannot turn water to ice. C is wrong because water near hot rocks is heated, not cooled. D is wrong because water merely flowing out would carry no pressure to drive a turbine. Exam tip: geothermal energy is renewable and comes from the Earth's internal heat; Puga valley, Ladakh.

Practice Questions

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Q2.Environment & EcologyAsked in: CDS · CDS-I 2019, GKMedium

Which one of the following statements about the National Green Tribunal is not correct?

  1. A.It was set up in the year 2010.
  2. B.It is involved in effective and expeditious disposal of cases relating to environmental protection and conservation of forests.
  3. C.It may consider giving relief and compensation for damages to persons and property.
  4. D.It is bound by the procedures laid down under the Code of Civil Procedure, 1908.
Show answer
Correct answer: D. It is bound by the procedures laid down under the Code of Civil Procedure, 1908.

The National Green Tribunal is not bound by the Code of Civil Procedure; it is guided by the principles of natural justice.

Q3.Environment & EcologyAsked in: CDS · CDS-I 2018, GKHard

Consider the following statements about National Wildlife Action Plan (NWAP) of India for 2017-2031:

1. This is the Third National Wildlife Action Plan.

2. The NWAP is unique as this is the first time India has recognized the concerns relating to climate change impact on wildlife.

3. The NWAP has ten components.

Which of the statements given above is/are correct?

  1. A.1 only
  2. B.1 and 2 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 1 and 2 only

The plan for 2017-2031 is India's third National Wildlife Action Plan and the first to deal with the impact of climate change on wildlife, but it has five components, not ten.