Floods MCQ Questions and Answers for Practice

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

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

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

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

3. Flooding in London is prevented by

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

4. What is a flash flood?

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

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

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

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

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

7. The Probable Maximum Flood is:

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

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

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

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

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

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

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

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

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

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

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

13. Flash floods are often caused

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

14. Flood can not occur due to

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

15. In ancient Egypt the Nile River

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