Irrigation Engineering Q & A

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  SREE SAKTHI ENGINEERING COLLEGE Page 1 SREE SAKTHI ENGINEERING COLLEGE COIMBATORE - 641 104. 080100017  - IRRIGATION ENGINEERING 2 MARKS QUESTIONS ANSWERS UNIT  –  I INTRODUCTION 1) Define irrigation ? Irrigation is defined as the science of artificial application of water to the land in accordance with the crop requirements. 2) What are the necessity of irrigation ? a)   inadequate rainfall  b)   increasing yield of crops c)   growing perennial crops d)   uneven distribution of rainfall. 3) What are the advantages of irrigation? a)   increase in food production  b)   optimum benefits c)   general prosperity d)   afforestation. 4) What are the disadvantages of irrigation? a)   over irrigation may lead to water logging  b)   it may reduce cropyield c)   it is expensive and complex. 5) What are the types of irrigation? a)   surface irrigation  b)   sub-surface irrigation. 6) what are the techniques of water distribution in the farms? a)   free flooding  b)    border flooding c)   check flooding d)    basin flooding, furrow irrigation method, drip irrigation method. 7) What are the types of sprinkler system? a)    permanent system  b)   semi-permanent system c)    portable system 8)What are the advantages of sprinkler irrigation?  SREE SAKTHI ENGINEERING COLLEGE Page 2 a)   land leveling is not required  b)   fertilisers can be uniformly applied c)   it is less labour oriented 9) What are the limitations of sprinkler irrigation? a)   initial cost of the system is very high  b)   it requires larger electrical power c)   high wind may distort sprinkler pattern 10) What is arid region? The area where irrigation is must for agriculture is called arid region 11) What is semi-arid region? The area in which inferior crops can be grown without irrigation 12) What is crop period? The time period that elapses from the instant of its sowing to the instant of its harvesting is called crop period. 13) What is base period? The time between the first watering of a crop at the time of its sowing to its last watering before harvesting is called the base period 14) What is rotation period? The time interval between two such consecutive watering is called frequency irrigation. 15) Define duty of water? It is the relationship between the volume of water and the area of crops it matures is called duty of water. 16) Define delta of a crop? Each crop requires a certain amount of water after a certain fixed interval of time, through its period of growth is called delta of a crop 17) What are the factors on which duty depends? a)   Type of crop  b)   Climate and seasons c)   Useful rainfall d)   Type of soil e)   Efficiency of cultivation method 18) What are kharif crops? The kharif crops are rice,bajra,jawar,maize,cotton,tobacco, groundnut,etc.  SREE SAKTHI ENGINEERING COLLEGE Page 3 19) What are rabi crops? Rabi crops are wheat,barley,gram,linseed,mustard,potatoes,etc 20) Define irrigation efficiency? It is the efficiency of water output to the water input, and is usually expressed as percentage. 21) What is called effective rainfall? Precipitation falling during the growing period of a crop that is available to meet the evapo-transpiration needs of the crop, is called effective rainfall. UNIT-II IRRIGATION METHOD 1) List some types of irrigation ? canal irrigation, lift irrigation, tank irrigation, etc 2) What are the necessity of irrigation ? a)   inadequate rainfall    b)   increasing yield of crops c)   growing perennial crops d)   uneven distribution of rainfall. 3) What are the advantages of irrigation? a)   increase in food production  b)   optimum benefits c)   general prosperity d)   afforestation. 4) What are the disadvantages of irrigation? a)   over irrigation may lead to water logging  b)   it may reduce crop yield c)   it is expensive and complex. 5) What are the types of irrigation? a)   surface irrigation  b)   sub-surface irrigation. 6) What are the techniques of water distribution in the farms? a)   free flooding  b)    border flooding c)   check flooding d)    basin flooding, furrow irrigation method, drip irrigation method. 7)What are the types of sprinkler system? a)    permanent system  b)   semi-permanent system c)    portable system  SREE SAKTHI ENGINEERING COLLEGE Page 4 8)what are the advantages of sprinkler irrigation? a)   land leveling is not required  b)   fertilisers can be uniformly applied c)   It is less labour oriented 9) what are the limitation of sprinkler irrigation? a)   initial cost of the system is very high  b)   it requires larger electrical power c)   high wind may distort sprinkler pattern 10) What are the types of canals? a)   alluvial canal  b)   non-alluvial canal 11)what are alignment of canals? a)   watershed canal or ridge canal  b)   contour canal c)   side slope canal 12)what are distribution system of canal irrigation? a)   Main canal  b)   Branch canal c)   Major canal d)   Watercourses e)   Minor canal 13)define tank irrigation?] It is defined as the storage irrigation scheme,which utilizes the water stored on the upstream side of a smaller earth dam 14)define tank banks? The earthen bunds, spanning across the steams are called tank bunds or tank banks 15)what is called alluvial soil? The process of silt deposition may continue over long periods of time, resulting in the formation is called alluvial soil 16)what is called non-alluvial soil? Mountainous regions may go on disintegrating over a period of time, resulting in the formation of a rocky plain area called non-alluvial soil 17)what is called watershed canal? The dividing ridge line between the catchment areas of two streams is called watershed canal]
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