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### Civil Engineering :: Irrigation

1. Borrow pits should preferably be located in

2.  A. field on the left side of the canal B. field on the right side of the canal C. fields on both sides of the canal D. central half width of the section of the canal.

3.  Irrigation canals are generally aligned along
4.  A. ridge line B. contour line C. valley line D. straight line.

5. The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of

6.  A. reverse curve B. next curve of the same order C. reverse curve plus the width of the river D. none of these.

7.  If B and d are the bed width and depth of a channel in metres, the combined losses due to evaporation and seepage in cumecs per kilometre length of the channel, is
8.  A. $$\frac { 1 } { 50 }$$$$(B+D)^2/3$$ B. $$\frac { 1 } { 100 }$$$$(B+D)^2/3$$ C. $$\frac { 1 } { 150 }$$$$(B+D)^2/3$$ D. $$\frac { 1 } { 200 }$$$$(B+D)^2/3$$

9. Pick up the incorrect statement from the following

10.  A. Side walls of a venturi head flume are splayed out from the end of the throat at 1 : 10 for a length of 4.5 m B. Length of side walls should be such that the width of the flume is made equal to 2/3rd the bed width of the distributary C. Once the width of the flume becomes 2/3rd of the width of the distributary, the splayed walls are increased to 1 in 3 to get full bed width D. None of these.

11. The difference in level between the top of a bank and supply level in a canal, is called

12.  A. berm B. free board C. height of bank D. none of these.

13. F.S.L. of a canal at its head with respect to parent channel is kept

14. A.
 at the same level
B.
 15 cm lower
C.

15 cm higher

D.

none of these.

15.  The measure to remove water logging of land, is
16. A.

to reduce percolation from canals and water courses

B.

to increase outflow from the ground water reservoir

C.
 both (a) and (b)
D.

neither (a) nor (b)

17. Attracting groynes are built

18. A.
 perpendicular to the bank
B.

inclined down stream

C.

inclined up stream

D.
 none of these.

19. Retrogression of the bed level of a river downstream a weir, occurs due to

20. A.

heavy impact of water

B.

increase of the bed level

C.

less percentage of silt

D.
 soft soil strata.