Q.1

Pick up the correct statement from the following:

  • If the flexibility is more than one, the outlet is hyper-proportional
  • If the setting of an outlet is higher than that required for proportionality, the outlet is hyper-proportional
  • If the setting of an outlet is lower than that required for proportionality, the outlet is sub-proportional
  • If the flexibility is zero, it is a rigid module
  • All the above.
Q.2

Water-shed line is abondened for aligning an irrigation canal if

  • water shed forms a sharp loop
  • canal has to take off from a river
  • towns and villages are located on the water shed line
  • all the above.
Q.3

Irrigation canals are generally aligned along

  • ridge line
  • contour line
  • valley line
  • straight line.
Q.4

The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as

  • efficiency
  • sensitivity
  • flexibility
  • modular limit.
Q.5

Groynes are generally built

  • perpendicular to the bank
  • inclined up stream up to 30°
  • inclined down stream upto 30°
  • all the above.
Q.6

The intensity of irrigation means

  • percentage of culturable commanded area to be irrigated annually
  • percentage of gross commanded area to be irrigated annually
  • percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
  • total depth of water supplied by the number of waterings.
Q.7

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

  • efficiency
  • sensitivity
  • flexibility
  • modular limit.
Q.8

A water-logged land is found suitable for cultivation due to

  • ease of tillage for preparation of the field for optimum condition of germination
  • absence of aeration of soil from root zone of the plant
  • regular supply of water to plants from the water table by capillary action
  • none of these.
Q.9

When a canal is carried over a natural drainage, the structure provided, is known as

  • syphon
  • aqueduct
  • super passage
  • syphon-aqueduct.
Q.10

While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C1, C2 and C3 where drainage bed levels C1 > C2 > C3, you will provide at site C3

  • an aqueduct
  • a syphon aqueduct
  • a super passage
  • a syphon.
Q.11

For the conditions enumerated to provide a crossing at C1 You will probably provide

  • an aqueduct
  • a super-passage
  • a syphon aqueduct
  • none of these.
Q.12

A river training work is generally required when the river is

  • meandering
  • aggrading
  • degrading
  • all the above.
Q.13

Pick up the incorrect statement from the following

  • A bank in the cross-section of a canal is provided on the right
  • A bank in the cross-section of a canal is provided on the left
  • A 'dowla' in the cross-section of a canal is provided on the left
  • None of these.
Q.14

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

  • reverse curve
  • next curve of the same order
  • reverse curve plus the width of the river
  • none of these.
Q.15

Lacey's equation for calculating flood discharge in rivers, is

  • V = 10.8 R1/2 S1/2
  • V = 10.8 R2/3 S1/2
  • V = 10.8 R2/3 S1/3
  • V = 10.8 R1/3 S2/3
Q.16

The uplift pressure on the roof of an inverted syphon, is maximum when

  • drain in running dry
  • canal is running dry
  • canal is running with F.S.L.
  • drain is running with H.F.L.
Q.17

Pick up the correct statement from the following

  • Escapes are essential safety valves in a canal system
  • The capacity of escapes should not be less than the capacity of the canal at its location
  • The escapes must lead the surplus water to natural drainages
  • The escapes are aligned to take advantage of contours of lower values
  • All the above.
Q.18

The top of the capillary zone

  • lies below the water table at every point
  • lies above the water table at every point
  • coincides the water table at every point
  • none of these.
Q.19

The saturation line is the line up to which banks get saturated after the canal runs for some time. The saturation gradient in ordinary loam soil, is generally

  • 2 : 1
  • 3 : 1
  • 4 : 1
  • 5 : 1
  • 6 : 1
Q.20

The level of the fioor of a syphon aqueduct can be obtained

  • by subtracting the depth of the culvert from the canal bed level
  • by subtracting the thickness of culvert plus the depth of the culvert from the canal bed level
  • both (a) and (b)
  • none of these.
Q.21

When a canal and a drainage approach each other at the same level, the structure so provided, is

  • an aqueduct
  • a syphon
  • a level crossing
  • inlet and outlet.
Q.22

If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the perimeter of the canal is

  • R(θ + tan θ)
  • 2R(θ + tan θ)
  • R(θ + cos θ)
  • 2R(θ + cos θ)
  • none of these.
Q.23

When a canal is carried over a natural drainage, the structure provided, is known as

  • syphon
  • aqueduct
  • super passage
  • syphon-aqueduct.
Q.24

For a given discharge in a channel, Blench curves give the relationship between the loss of head (HL) and

  • specific energy up-stream
  • specific energy down-stream
  • critical depth of water down-stream
  • depth of water down-stream
Q.25

The most suitable section of a lined canal, is

  • triangular section with circular bottom for small canals
  • trapezoidal section with rounded corners for large canals
  • rectangular section with rounded corners for large canals
  • both (a) and (b)
  • both (a) and (c)
Q.26

Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less

  • populated area
  • alkaline area
  • forest area
  • fallow land.
Q.27

The depth of the crest of a scouring sluice below the crest of a head regulator, is generally kept

  • 0.20 m
  • 1.20 m
  • 2.20 m
  • 3.20 m
  • 4.90 m
Q.28

A fall which maintains its depth, is

  • a trapezoidal notch fall
  • a low weir fall
  • a rectangular notch fall
  • all the above.
Q.29

For smooth entry of water in a canal, the angle between head regulator and water is generally kept

  • 80°
  • 90°
  • 110°
  • 120°
Q.30

Pick up the correct statement from the following:

  • If the flexibility is more than one, the outlet is hyper-proportional
  • If the setting of an outlet is higher than that required for proportionality, the outlet is hyper-proportional
  • If the setting of an outlet is lower than that required for proportionality, the outlet is sub-proportional
  • If the flexibility is zero, it is a rigid module
  • All the above.
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