Tag: biology

Questions Related to biology

Which of the following is the benefit of water harvesting?

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. It could be utilized for irrigation purposes.

  2. This water increases the underwater level.

  3. It could be utilized for domestic purposes.

  4. All of the above

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Correct Option: D

Percentage of precipitation that can be stored in dams of India is 

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. 10

  2. 18

  3. 43

  4. 55

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Correct Option: A
Explanation:

Percentage of precipitation of rain that can be stored in dams of India is 10%. Dams are used as the reservoir of water for the agricultural, industrial and domestic use. Hydroelectric dams are used to generate electricity using hdropower.

Thus, the correct answer is '10.'

All of the following are advantages of dams except

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. flood control

  2. recreation

  3. hydroelectric power

  4. enhancing natural spawning patterns of fish

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Correct Option: D

Mullaperiyar dam is in the district?

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. Thrissur

  2. Pathanamthitta

  3. Idukki

  4. Alappuzha

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Correct Option: C

Which of the following projects contribute to displacement?

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. Dam projects

  2. Urban infrastructure projects

  3. Transportation projects

  4. All the above

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Correct Option: D

It is important to make small check dams across the flooded gullies because they
(i) Hold water for irrigation
(ii) Hold water and prevent soil erosion
(iii) Recharge ground water
(iv) Hold water permanently

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. (i) and (iv)

  2. (ii) and (iii)

  3. (iii) and (iv)

  4. (ii) and (iv)

  5. (i), (ii) and (iii)

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Correct Option: E
Explanation:

A major portion of water stored behind dams in the world is withdrawn for irrigation that is, evaporation and transpiration needs. Water used in excess of evaporation and transpiration needs appears in the system as surface or groundwater. The total quantum of flow and size and frequency of peak floods in the flood season reduce in the downstream due to a dam, reducing flood hazard due to inundation of land, crop and property. It also reduces congestion of run off in plains and coastal lands. Any soil erosion such as gullies already formed can be tackled by the construction of dams or obstructions. 

Therefore, the correct answer is option E.

The drawback of dam is

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. Block fish migration

  2. Can cause flood on dam side area

  3. Displace local people

  4. All of the above

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Correct Option: D

Krishnaraj Sagar project on which river?

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. Kaveri

  2. Godavari

  3. Krishna

  4. Tunga

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Correct Option: A
Explanation:

The dam was built across Kaveri river in 1924. The kings laid the foundation for this project. It is the main source of water for Mysore districts. It has an ornamental garden attached to it.

So, the correct option is 'Kaveri'.

Which of the following pairs in false?

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. Nagarjuna sagar project - Godavari

  2. Hirakud project - Mahanadi

  3. Sardar Sarovar Project - Narmada

  4. Bhakra - Nangal project - Sutlej

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Correct Option: A
Explanation:

Nagarjuna Sagar project was held in Nalgonda district of Telangana and Andhra Pradesh. The dam was built on the Krishna river. It is the largest and highest masonry dam in the world. 

So, the correct option is ' Nagarjuna Sagar project- Godavari'.

Khadins, Ahars and Kattas are ancient structures that are examples of water harvesting.

management of water uses and limitations of dams air, water and soil management of natural resources biology

  1. True

  2. False

  3. Nither

  4. Either

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Correct Option: A