0

Water

Attempted 0/15 Correct 0 Score 0

According to the UN, the minimum amount of water required by a person for personal use and for maintaining hygiene is around

  1. 71 litres

  2. 50 litres

  3. 97 litres

  4. 22 litres

  5. None of these


Correct Option: B
Explanation:

Yes, it is correct. The amount of recommended water per person, according to the UN is 50 litres.

The amount of saline water on Earth is

  1. 71% of the water on the Earth

  2. 97% of the water on the Earth

  3. 2% of the water on the Earth

  4. 1% of the water on the Earth

  5. There is no saline water


Correct Option: B
Explanation:

Yes, it is correct. About 97% of the water on the Earth is saline, i.e. has salt and minerals, which is unfit for drinking.

In which of the following processes the water enters the ground and fills the spaces and the cracks underground?

  1. Infiltration

  2. Transpiration

  3. Seeping

  4. Draining

  5. None of these


Correct Option: A
Explanation:

Yes, it is correct. The rain water seeps into the ground and fills the spaces and the cracks underground. This is called infiltration.

Which of the following sources have a common source of water, i.e. the underground water?

(a) Well (b) Tap (c) Tube well (d) Tanker (e) Bore well

  1. Only (a), (c) and (e)

  2. Only (b) and (d)

  3. Only (c) and (e)

  4. Only (a) and (d)

  5. All of these


Correct Option: A
Explanation:

Yes, it is correct. All the given sources have underground water as a common source of water.

Which of the following is correct regarding a water table?

  1. The upper layer of oceans or lakes is the water table.

  2. The upper layer of the ground water is the water table.

  3. The land formed at the mouth of a river is called a water table.

  4. A shallow body of water surrounded by sand dunes is called a water table.

  5. None of these


Correct Option: B
Explanation:

Yes, it is correct, as the layer above the ground water is called a water table. It can be 1 metre to several metres deep.

The three forms of water can be seen in the water cycle. In which of the following parts can one see the solid form of water?

  1. Lakes

  2. Poles of the earth

  3. Under the earth

  4. Air

  5. Oceans


Correct Option: B
Explanation:

Yes, it is correct. The solid form of water means snow, glaciers and ice. This can be seen on the hills and the highest of mountains, which are present at the poles.

Which of the following processes in water cycle takes place in the atmosphere, and not on the earth's surface?

  1. Precipitation

  2. Evaporation

  3. Draining

  4. Condensation

  5. Transpiration


Correct Option: D
Explanation:

Yes, it is correct as water vapour in the atmosphere condenses to form clouds. It takes place in the atmosphere and not on the land.

Which of the following rivers originate in the Himalaya?

(a) Indus (b) Kaveri (c) Ganges (d) Brahmaputra (e) Pennar

  1. Only (a), (b) and (c)

  2. Only (b) and (d)

  3. Only (d) and (e)

  4. Only (a), (c) and (d)

  5. Only (b) and (e)


Correct Option: D
Explanation:

Yes, it is correct. All the three rivers given in the option, have their origin in the Himalaya.

What is an aquifer?

  1. A hole dug underground

  2. The space between the rocks below the water table

  3. The pores in the leaves for transpiration

  4. A pump to pump out the underground water

  5. A place built to store water in the village


Correct Option: B
Explanation:

Yes, the space in between layers of hard rocks is called an aquifer. An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted using a water well.

Which of the following is not the reason behind the decrease in water table level?

  1. Increasing number of roads and pavements

  2. Deforestation

  3. Scanty rainfall

  4. Increase in number of parks

  5. Increase in industrial activities


Correct Option: D
Explanation:

Yes, it is the correct answer as by increasing the number of parks, the seepage of rain water into the ground increases.

Which of the following has no role in managing water?

  1. Rain water harvesting

  2. Constructing dam

  3. Drip irrigation

  4. Industrial boom

  5. Repairing the leaking taps


Correct Option: D
Explanation:

Yes, it is correct as increase in the number of industries means increase in the use of water and less underground water recharging. Repairing of leaking taps saves water loss. Hence, manages water.

Which of the following is the most used source of potable water for the villagers?

  1. Sea

  2. Rain water collected

  3. Well

  4. Tanks

  5. Canals


Correct Option: C
Explanation:

Yes, it is correct. Well is the best and most used source of potable water in villages. Well is constructed to access the underground water.

What does recharging the ground water means?

  1. To pump underground water out

  2. To conserve underground water

  3. To use underground water

  4. To clean the ground water

  5. All of the above


Correct Option: B
Explanation:

Yes, it is correct. The term recharging the ground water means, conserving the ground water, allowing the rain water and excess of waste water to seep into the ground. This increases the level of the water table.

Which of the following is not a fresh water body?

  1. Sea

  2. Lake

  3. Pond

  4. Stream

  5. River


Correct Option: A
Explanation:

Yes, it is correct. Rivers flow and carry dissolved salt in the oceans and seas. Hence, the sea water is saline.

In which of the following methods minimum water is used for maximum plants?

  1. Rainwater harvesting

  2. Infiltration

  3. Drip irrigation

  4. Canal irrigation

  5. None of these


Correct Option: C
Explanation:

Yes, it is correct. Maximum number of plants can be watered with very little water, as the pipe is pierced at various places and arranged in a manner that the water reaches the roots of the plants.

- Hide questions