Floods

Q. What are the different types of floods?

1. Dam floods
2. Flash floods
3. Coastal floods
4. River floods

Q. What are flood-plains?

1. The area where the river meets the sea is called flood-plains.
2. Treeless river beds found during the dry season when the river shrinks.
3. The area were the river originates is called a flood-plain.
4. None of the above.

Q. What are coastal floods?

1. A flood associated with cyclones, high tides and tsunamis.
2. A flood associated with rivers.
3. A flood associated with cyclones only
4. A flood associated with high tides and tsunamis only.

Q. Assertion [A]: Landslides are naturally caused disasters.

Reason [R]: Activities such as mining and deforestation can cause landslides.

1. [A] is false and [R] is true.
2. [A] and [R] are false.
3. [A] is true but [R] is false.
4. [A] and [R] are true and [R] is the correct justification for [A].

Q. Which of the following statement(s) is/are correct?
Statement I: To prevent flooding, afforestation needs to be done.
Statement II: Afforestation reduces flooding and soil erosion to a certain level.

1. Statement II only
   
2. Both statements are incorrect.
   
3. Statement I only
   
4. Both statements are correct.
   

Q. What are floods?

1. Floods can be defined as the formation of lakes due to heavy rainfall.
2. Floods can be defined as an overflow of a large amount of water beyond its normal limits.
3. None of the above
4. Floods can be defined as the overflow of water into the sea.

Q. Which of the following statement(s) is/are correct?

1. Flood can be defined as a large flow of water.
2. When a flood occurs within six hours of heavy rainfall, it is called a Coastal flood.
3. Floods may lead to contamination of drinking water.
   
4. Effects of floods can be minimized by increasing vegetation cover.
   

Q.

1 (d). Excessive rain may cause _______.

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Which of the following are measure(s) that are to be done before a flood strikes?

1. Afforestation
2. Deforestation
3. Dam construction
4. Embankment construction

Q. Why are floods caused?

1. Construction of dams
2. Torrential rainfall in a particular region
3. Poor drainage systems
4. Deforestation

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> The phenomenon of a sudden rise in the water levels due to heavy rainfall is called ____.

1. flash flood
2. river flood
3. pluvial flood
4. urban flood

Q. What are the effects of floods?

1. Cleaning of roads
2. Destruction of property
3. Outbreak of cholera and dysentery
4. Loss of life and habitats

Q. Read the following statements and choose the correct option that best describes these statements:

1. Precipitation or melting of snow over a large catchment area can cause a river to overflow, causing a flood.
2. A coastal flood is associated with cyclones, high tides, and tsunamis.

1. Statement 1 is correct and statement 2 is incorrect.
2. Both the statements are incorrect.
3. Both the statements are correct.
4. Statement 1 is incorrect and statement 2 is correct.

Q.

Excess rain results in floods.

1. True
2. False