Q.1

The measure to remove water logging of land, is

  • to reduce percolation from canals and water courses
  • to increase outflow from the ground water reservoir
  • both (a) and (b)
  • neither (a) nor (b)
Q.2

The field capacity of a soil depends upon

  • capillary tension in soil
  • porosity of soil
  • both (a) and (b)
  • neither (a) nor (b).
Q.3

Pick up the incorrect statement from the following:

  • In free flooding irrigation, water is admitted at one corner of a field and is allowed to spread over the entire area
  • In check method of irrigation, the field is divided into smaller compartments and water is admitted to each in turn
  • In furrow irrigation water is admitted between the rows of plants in the field
  • None of these.
Q.4

For the design of major hydraulic structures on the canals, the method generally preferred to, is based on

  • Bligh's theory
  • Electrical analogy method
  • The relaxation method
  • Khosla's method of independent variables.
Q.5

Pick up the correct statement from the following:

  • Water table generally follows the ground surface above it with a few exceptions
  • Static level of water in an open well indicates the position of the water table
  • Saturated pores of a soil in the capillary zone above water table have negative pressure
  • At water table, hydrostatic pressure is zero
  • All the above.
Q.6

Process of meandering is due to

  • sediment load of streams
  • discharge and hydraulic properties of streams
  • relative erodibility of the bed and banks
  • all the above.
Q.7

The main function of a diversion head works of a canal from a river, is

  • to remove silt
  • to control floods
  • to store water
  • to raise water level
  • all the above.
Q.8

Attracting groynes are built

  • perpendicular to the bank
  • inclined down stream
  • inclined up stream
  • none of these.
Q.9

Finally formed berms in canals are provided for

  • protection of banks erosion by the waves
  • control of seepage losses
  • strengthening of banks
  • all the above.
Q.10

For the stability of a structure against seepage pressure according to Khosla's creep theory, the critical gradient is

  • zero
  • 0.25
  • 0.50
  • 0.75
  • 1.00
Q.11

The crest level of a canal diversion head work, depends upon

  • F.S.L. of the canal
  • discharge perimeters
  • pond level
  • all the above
  • none these.
Q.12

According to G.W. Pickles the effect of confining the flood water of a river between levee, is to increase

  • rate of flood wave
  • water surface elevation during floods
  • maximum discharge
  • velocity and scouring action
  • surface slope of streams above the leveed portion.
Q.13

For designing the venturi head,

  • width of the throat should not be less than one-third of the bed width of main canal
  • width of the throat should not be less than the width obtained from the formula B = Q / 1.2d3/2, where d is the difference in levels of F.S.L. and sill
  • minimum throat width should not be less than 60 cm
  • length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal
  • all the above.
Q.14

For diversion of flood water of rivers, the type of canal constructed, is

  • ridge canal
  • perennial canal
  • inundation canal
  • canal.
Q.15

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

  • heavy impact of water
  • increase of the bed level
  • less percentage of silt
  • soft soil strata.
Q.16

An outlet is said to be proportional if its flexibility, is

  • zero
  • less than one
  • more than one
  • one
Q.17

The discharge over a trapezoidal crest of a Sarda fall with free over fall conditions, is

  • 0.45 2g . LH3/2 (H/B)1/3
  • 0.45 2g . LH2/3 (H/B)2/3
  • 0.45 2g . LH3/2 (H/B)1/6
  • 0.45 2g . LH1/6 (H/B)3/2
Q.18

Pick up the correct statement from the following:

  • Duty of canal water is defined as the total area irrigated by the discharge averaging one unit during the base period of the duty
  • Duty of canal water is usually calculated at the head discharge of a channel
  • Duty of canal water at the head of a channel and at the outlet of a distributary, differ considerably due to progressive losses of water
  • Duty of canal water at the outlet of a distributary, is generally known as outlet factor or outlet discharge factor
  • All the above.
Q.19

Borrow pits should preferably be located in

  • field on the left side of the canal
  • field on the right side of the canal
  • fields on both sides of the canal
  • central half width of the section of the canal.
Q.20

The depth of rice root zone, is

  • 50 cm
  • 60 cm
  • 70 cm
  • 80 cm
  • 90 cm
Q.21

Cross regulators in main canals are provided

  • to regulate water supply in the distributaries
  • to increase water head upstream when a main canal is running with low supplies
  • to overflow excessive flow water
  • none of these.
Q.22

In a canal syphon, the flow is

  • under atmospheric pressure
  • pipe flow
  • with critical velocity
  • under negative pressure.
Q.23

In a Sarda type fall, the rectangular crest, may be used for discharge upto

  • 6 cumecs
  • 10 cumecs
  • 14 cumecs
  • 20 cumecs
  • 25 cumecs.
Q.24

The sinuosity of a meander is the ratio of

  • meander length and the width of meander
  • meander length and half width of the river
  • curved length and the straight distance
  • none of these.
Q.25

The top soil of a water logged field becomes more alkaline and infertile if its pH value is

  • 6
  • 8
  • 9
  • 10
  • 11
Q.26

For cereal crops the most commonly adopted method of irrigation, is

  • free flowing method
  • check method
  • furrow method
  • sprinkling method.
Q.27

When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called

  • syphon
  • aqueduct
  • super passage
  • syphon-aqueduct.
Q.28

The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is

  • 1.084
  • 1.074
  • 1.064
  • 1.054
  • 2.053
Q.29

For standing crops in undulating sandy fields, the best method of irrigation, is

  • sprinkler irrigation
  • free flooding
  • check method
  • furrow method
  • none of these.
Q.30

In rigid module, the discharge

  • is independent of water levels in the distributary and water course
  • depends upon the water level in distributary
  • depends upon the water level in the water course
  • depends upon the water levels of both, i.e. distributary and water course
  • none of these.
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