128 AGRICULTURAL ENGINEERING 



QUESTIONS 



1. How are canals used to secure a supply of irrigation water? 



2. Why is the construction of a canal important? 



3. Name some of the largest famous irrigation canals. 



4. What are the purposes of irrigation reservoirs? 



5. How do forests act as reservoirs for irrigation waters? 



6. Describe some of the largest irrigation reservoirs which have 

 been constructed. 



7. What advantage has pumping over other means of supplying 

 water? 



8. How much does it cost to pump water for irrigation under nor- 

 mal conditions? 



9. What can be said of windmills as a source of power for pumping 

 irrigation water? 



