Floods MCQ Questions and Answers for Practice

1. How many feet of fast-moving flood water can sweep a vehicle away?

1. 4 feet
2. 3 feet
3. 2 feet

2. How many inches of fast-moving flood water can knock you off your feet?

1. 10 inches
2. 6 inches
3. 8 inches

3. Flooding in London is prevented by

1. westerly winds
2. high dams along the Themes
3. a barrier that is raised and lowered
4. gates in the western part of the city

4. What is a flash flood?

1. A deep flood
2. A flood that happens fast with little warning
3. A sophisticated flood
4. Power lines fallen in flood waters

5. The tsunami that killed over 250,000 people in south and southeast Asia in 2004 was caused by

1. a hurricane
2. a tropical storm
3. a volcanic explosion
4. an earthquake

6. The flooding of New Orleans in 2004 was caused by

1. a hurricane
2. a tornado
3. an earthquake
4. a tsunami

7. The Probable Maximum Flood is:

1. the maximum flood experienced in the last 200 years
2. the maximum flood experienced since flood records have existed
3. an estimation of the largest possible flood that could occur at a particul ar location
4. the maximum flood experienced in the last 100 years

8. Which is not a characteristic of a regional flood?

1. A small drainage basin.
2. Floodplains covered with floodwaters
3. An extended rise of river elevation for weeks to months
4. Large storm systems or an extended period of rainfall

9. The change in elevation of a stream per unit length is called

1. velocity
2. discharge
3. base level
4. gradient

10. The lowest level to which a stream may erode is called

1. velocity
2. discharge
3. base level
4. gradient

11. Which of the following is not a characteristic of a braided stream?

1. abundant bed load
2. constant discharge
3. branching channels
4. high gradient

12. Which of the following potentially affects the size of a flood?

1. vegetation in and around a river
2. all of the above
3. bridges and other structures in waterways
4. the size and windiness of a river

13. Flash floods are often caused

1. by rainfall over many days
2. by river beds that are too high
3. by thunderstorms
4. dikes and dams that are too high

14. Flood can not occur due to

1. Heavy rain
2. Biological disaster
3. Cyclone
4. Tsunami

15. In ancient Egypt the Nile River

1. brought nutrients that made the fields fertile
2. changed its course almost every year
3. destroyed large areas of farming land every year
4. had to be regulated because it carried too much water