Q.1

Pick up the correct statement from the following:

  • The full supply level of a canal should be above ground level
  • According to Lacey, regime conditions require a particular slope for a given discharge and silt factor
  • In case the ground slope is less than the required bed slope, the silt factor must be reduced by permitting the entry of coarse silt
  • All the above.
Q.2

A hydraulic structure is designed to withstand

  • seepage forces
  • hydraulic jump
  • hydraulic pressure
  • all the above.
Q.3

In a barrage, the crest level is kept

  • low with large gates
  • high with large gates
  • high with no gates
  • low with no gates.
Q.4

For a standing crop, the consumptive use of water is equal to the depth of water

  • transpired by the crop
  • evaporated by the crop
  • transpired and evaporated by the crop
  • used by the crop in transpiration, evaporation and also the quantity of water evaporated from adjacent soil.
Q.5

The velocity of drainage water in the barrels of a syphon-aqueduct, is normally limited to

  • 1 to 2 m per second
  • 2 to 3 m per second
  • 3 to 4 m per second
  • 4 to 5 m per second.
Q.6

The main cause of silting up a channel,

  • non-regime section
  • inadequate slope
  • defective head regulator
  • defective outlets
  • all the above.
Q.7

The width of a meander belt is the transverse distance between

  • apex point of one curve and apex point of the reserve curve
  • apex point and the crossing
  • two banks of meandering river
  • none of these.
Q.8

The length and width of a meander and also the width of the river, vary roughly as

  • square root of the discharge
  • discharge
  • square of the discharge
  • cube of the discharge.
Q.9

The optimum depth of kor watering for a rice crop, is

  • 23.0 cm
  • 19.0 cm
  • 17.5 cm
  • 13.5 cm
  • 12.0 cm
Q.10

The state of the soil when plants fail to extract sufficient water for their requirements, is

  • maximum saturated point
  • permanent wilting point
  • ultimate utilisation point
  • none of these.
Q.11

A fall in a canal bed is generally provided, if

  • ground slope exceeds the designed bed slope
  • designed bed slope exceeds the ground slope
  • ground slope is practically the same as the designed bed slope
  • none of these.
Q.12

In north Indian Plains, optimum depth of kor watering for wheat, is

  • 23.0 cm
  • 19.0 cm
  • 17.5 cm
  • 13.5 cm
  • 12.0 cm
Q.13

The useful moisture of soil, is equal to its

  • field capacity
  • saturation capacity
  • moisture content at permanent wilting point
  • difference between filed capacity and permanent wilting point within the root zone of plants.
Q.14

The sensitivity of a rigid module, is

  • 2.00
  • 1.50
  • 1.00
  • 0.50
  • zero
Q.15

An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as

  • non-modular outlet
  • semi-modular outlet
  • flexible modular outlet
  • right modular outlet.
Q.16

Regime conditions in a channel may occur if

  • discharge is constant
  • channel flows uniformly in incoherent alluvium as that transported in suspension
  • silt grade and silt charge are constant
  • all the above.
Q.17

If the optimum depth of kor watering for a crop is 15.cm, the outlet factor for the crop for four week period in hectares per cumec, is

  • 1000
  • 1200
  • 1400
  • 1600
  • 2000
Q.18

Bligh's theory of seepage assumes

  • equal weightage to the horizontal and vertical creep
  • more weightage to horizontal creep than vertical creep
  • less weightage to horizontal creep than vertical creep
  • loss of head follows the sine curve.
Q.19

If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is

  • Q = 1.71 BD1/2
  • Q = 1.71 BD
  • Q = 1.71 BD3/2
  • Q = 1/71 BD2/3
  • none of these.
Q.20

Useful soil moisture for plant growth, is

  • capillary water
  • gravity water
  • hygroscopic water
  • chemical water
  • all the above.
Q.21

A deficit of sediments in flowing water may cause a river

  • meandering type
  • aggrading type
  • degrading type
  • sub-critical type.
Q.22

Effective precipitation for a crop may be defined as

  • total precipitation minus the loss due to evaporation
  • total precipitation minus the loss due to infiltration
  • total precipitation during the crop period
  • available water stored in soil within root zone of the crop.
Q.23

The field capacity of a soil is 25%, its permanent wilting point isand specific dry unity weight is 1.If the depth of root zone of a crop, iscm, the storage capacity of the soil, is

  • 8 cm
  • 10 cm
  • 12 cm
  • 14 cm
  • 16 cm
Q.24

According to Khosla, the exist gradient of surface flow

  • depends upon the b/d ratio
  • is independent of the b/d ratio
  • is independent of the depths of d/s cut off walls
  • none of these.
Q.25

Pick up the correct statement from the following:

  • Gravity water is harmful to crops
  • Hygroscopic water remains attached to soil molecules by chemical bond
  • Capillary moisture held in the soil pores against gravity by surface tension, is utilised by plants
  • All the above.
Q.26

Bed bars in a canal are provided

  • to watch the general behaviour of canal
  • to measure the discharge
  • to raise the supply level
  • to control the silting
  • all the above.
Q.27

Canals taken off from ice-fed perennial rivers, are known

  • permanent canals
  • ridge canals
  • perennial canals
  • inundation canals
  • ice canals.
Q.28

Canals constructed for draining off water from water logged areas, are known

  • drains
  • inundation canals
  • valley canals
  • contour canals
  • ridge canals.
Q.29

If H and d are the water depth and drop in the bed level at a Sarda fall, the width B of the trapezoidal crest, is given by

  • B = 0.22 H + d
  • B = 0.33 H + d
  • B = 0.44 H + d
  • B = 0.55 H + d
Q.30

The Lacey's regime velocity is proportional to

  • R1/2 S3/4
  • Q3/4 S1/3
  • R3/4 S1/3
  • R2/3 S1/2
0 h : 0 m : 1 s