Water Management

Q.

Question 17

Why is there a need for conserving water? Give two reasons.

Q.

Underground water is generally free from suspended impurities.

1. True
2. False

Q.

Question 10

Catch water where it falls' is the basic idea behind

(a) recycling of water
(b) making dams to store water
(c) rainwater harvesting
(d) condensation of water vapour

Q. Which of the following is not a cause of water pollution?

1. Washing clothes in rivers
2. Dumping factory waste into seas
3. Excessive use of chemical fertilizers
4. Aquatic animals excreting in lakes

Q. Which of the following are benifits of rainwater harvesting system?

1. Flood mitigation
2. Greater water availability
3. Reduction in use of municipal water
4. Increase in rainfall

Q. Choose the applications of rainwater harvesting.

1. Conservation of water
2. Alternate source of energy
3. Improvement of groundwater level
4. Prevention of pollution

Q.

Brewery and sugar factory waste alters the quality of a water body. Measurement of all chemicals in the water, that can be oxidized, can be done by

1. BAD and CAD

2. Turbidity

3. COD and BOD

4. pH

Q. Rainwater obtained from storage tanks of rainwater harvesting can be directly used for drinking and cooking.

1. True
2. False

Q. Which of the following steps help in water management?

1. Turning off the tap while brushing.
2. Avoid washing clothes.
3. Mopping the floor instead of washing it.
4. Fixing broken taps and taps.

Q.

Give one word for the following:

The reservoir of water below the Earths surface is called

Q.

The water vapour released by trees during respiration helps to increase rainfall.

1. True
2. False

Q.

Define water harvesting.

Q.

“Catch water where it falls” is the basic idea behind:

1. Recycling of water

2. Making dams to store water

3. Rainwater harvesting

4. Condensation of water vapor.

Q.

Discuss reasons for the shortage of water on earth for human consumption.

Q. In India, agriculture depends only on the rainfall for the purpose of irrigation.

1. True
2. False

Q.

Rainwater harvesting is done to conserve water but what is the main purpose of rainwater harvesting?

Q. Which of the following is true about rooftop rainwater harvesting?

1. This water may contain soil from the roof and need filtering before it is used.
2. The rainwater is transferred from the rooftop to a storage tank, present above the ground, through pipes.
3. All of the above.
4. Instead of collecting rainwater in the tank, the pipes can go directly into a pit in the ground.

Q.

1. a and b
2. a and d
3. c and d
4. b and c

Q. Give the reasons for water scarcity.

Q. Where can rainwater harvesting be implemented?

1. societies, schools, institutions
2. commercial premises
3. cities and villages
4. everywhere

Q.

What causes eutrophication?

Q. Rainwater harvesting is collecting & storing rainwater, which includes activities aimed at:

1. harvesting surface water
2. groundwater
3. prevention of losses through evaporation and seepage
4. all of the above

Q. Garima was reading the newspaper when she suddenly saw the following poster winning the first prize in an event.

The event was most probably organised on:

1. 7${}^{\text{th}}$ april
2. 15${}^{\text{th}}$ august
3. 22${}^{\text{nd}}$ april
4. 22${}^{\text{nd}}$ march

Q. Which of the following is the reason for drying up of wells?

1. Water is being pumped up from under the ground, with the help of electric motors.
2. The lakes in which rain water used to collector are no longer there.
3. The soil around trees and parks is now covered with cement.
4. All of these

Q. Which of the following techniques are used for rainwater harvesting?

1. Water is allowed to go into the ground directly from the roadside drains that collect rainwater.
2. Rooftop rainwater harvesting
3. Both of the above
4. None of the above

Q.

Rain water harvesting is a method employed to:

1. stop soil erosion
2. raise the water table
3. increase afforestation
4. decrease floods and droughts

Q. _______ is one of the major source of contamination of ground water.

1. Ponds
2. Rain
3. Industrial effluent
4. Chemical fertilizers

Q.

Question 10

1. Define rainwater harvesting.

2. Explain how rainwater is collected and stored for various purposes?

3. Will rainwater harvesting helps in replenishing groundwater? Explain.

Q.

With the help of the information given below, select the most appropriate statement(s).

1. Farmers in region B are likely to depend on ground water for irrigation
2. Ground water is not used for irrigation
3. Farmers in region A are likely to depend on ground water for irrigation

4. Ground water is not present in both regions A and B

Q.

What do you mean by rainwater harvesting?