# Home / Civil Engineering / Irrigation Engineering :: section-1

### Civil Engineering :: Irrigation Engineering

1. Finally formed berms in canals are provided for

2.  A.  Protection of banks erosion by the waves B.  Control of seepage losses C.  Strengthening of banks D.  All the above   3. Canals constructed for draining off water from water logged areas, are known

4.  A.  Drains B.  Inundation canals C.  Valley canals D.  Contour canals   5. A hydroelectric scheme operating under a head of 80 m will be classified as

6.  A.  low head scheme B.  medium head scheme C.  high head scheme D.  none of the above   7. Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as

8.  A.  low sodium water B.  medium sodium water C.  high sodium water D.  very high sodium water   9. If d1 is the depth of cutting, d2 is the height of the bank from bed level r2 : 1 and r1 : 1 are the slopes in filling and cutting respectively, the horizontal distance n between the bed and bank, is

10.  A.  x = r1 d1 B.  x = r2 d2 C.  x = d1 / r1 D.  x = d2 / r2   11. A minimum of 90 cm free board is provided if the discharge in the canal is between

12.  A.  30 to 33 cumecs B.  30 to 60 cumecs C.  Over 60 cumecs D.  Over 100 cumecs   13. If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is

14.  A.  10 cm B.  15 cm C.  20 cm D.  25 cm   15. The difference in level between the top of a bank and supply level in a canal, is called

16.  A.  Berm B.  Free board C.  Height of bank D.  None of these   17. The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called

18.  A.  Syphon B.  Super passage C.  Super-aqueduct D.  Syphon aqueduct   19. The downstream expansion head of a guide bank is extended to subtend an angle at the centre, equal to

20.  A.  30° B.  45° C.  60° D.  90°   