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Civil Engineering :: Irrigation Engineering

  1. The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be

  2. A.

     50 cm

    B.

     55 cm

    C.

     56 cm

    D.

     60 cm

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  3. Which of the following canal outlets maintains a constant discharge ?

  4. A.

     non-modular outlet

    B.

     flexible outlet

    C.

     rigid module

    D.

     none of the above

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  5. The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be

  6. A.

     70mm

    B.

     80mm

    C.

     90 mm

    D.

     105 mm

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  7. The level of the floor of a syphon aqueduct can be obtained

  8. A.

     By subtracting the depth of the culvert from the canal bed level

    B.

     By subtracting the thickness of culvert plus the depth of the culvert from the canal bed level

    C.

     Both (A) and (B)

    D.

     None of these

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

  10. A.

     At the same level

    B.

     15 cm lower

    C.

     15 cm higher

    D.

     None of these

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  11. The ratio of the head recovered to the head put in, is known as

  12. A.

     Efficiency

    B.

     Sensitivity

    C.

     Flexibility

    D.

     Modular limit

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  13. Pick up the incorrect statement from the following

  14. 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

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  15. According to Khosla, the exits gradient of surface flow

  16. A.

     Depends upon the b/d ratio

    B.

     Is independent of the b/d ratio

    C.

     Is independent of the depths of d/s cut off walls

    D.

     None of these

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  17. In case of non-availability of space due to topography, the most suitable spillway is

  18. A.

     straight drop spillway

    B.

     shaft spillway

    C.

     chute spillway

    D.

     ogee spillway

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  19. Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.
    Reason R : Rainfall gradient is steep.
    Select your correct answer according to the coding system given below :

  20. A.

     Both A and R are true and R is the correct explanation of A

    B.

     Both A and R are true but R is not the correct explanation of A

    C.

     A is true but R is false

    D.

     A is false but R is true

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