Q.1

Pick up the incorrect statement from the following

  • 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
  • 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
  • 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
  • None of these.
Q.2

To hold hydraulic jumps, baffle walls are provided in

  • Sarda type falls
  • English type falls
  • Montague type falls
  • Vertical type falls.
Q.3

The ratio of the rate of change of discharge of an outlet and parent channel, is known as

  • efficiency
  • sensitivity
  • flexibility
  • modular limit.
Q.4

According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is

  • 1.25 D
  • 1.50 D
  • 1.75 D
  • 2.00 D
Q.5

The water face of the guide banks, is protected by

  • one men stone pitching
  • two man stone pitching
  • three man stone pitching
  • four man stone pitching
  • five man stone pitching.
Q.6

The width of a dowla is generally kept betweentocm and its height above the road level should invariably be more than

  • 10 cm
  • 20 cm
  • 30 cm
  • 40 cm
Q.7

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

  • syphon
  • aqueduct
  • super passage
  • syphon-aqueduct.
Q.8

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.9

To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls

  • of R.C.C. or steel plate 8 cm thick
    15-15-48-1.png
  • of height l/3rd to l/4th the depth of water in the main canal
    15-15-48-1.png
  • spaced at interval of times their heights
  • extending about one metre beyond a line drawn at an inclination of 2 : 1 to the axis of main canal
  • all the above.
Q.10

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.11

The ratio of the rate of change of discharge of an outlet and parent channel, is known as

  • efficiency
  • sensitivity
  • flexibility
  • modular limit.
Q.12

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.13

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.14

The ratio of the rate of change of discharge of an outlet and parent channel, is known as

  • efficiency
  • sensitivity
  • flexibility
  • modular limit.
Q.15

The width of a dowla is generally kept betweentocm and its height above the road level should invariably be more than

  • 10 cm
  • 20 cm
  • 30 cm
  • 40 cm
Q.16

Pick up the incorrect statement from the following

  • 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
  • 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
  • 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
  • None of these.
Q.17

The width of a dowla is generally kept betweentocm and its height above the road level should invariably be more than

  • 10 cm
  • 20 cm
  • 30 cm
  • 40 cm
Q.18

In a syphon aqueduct

  • drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough
  • drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough
  • canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough
  • canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough.
Q.19

If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle θ with horizontal, the hydraulic mean depth is

  • D
  • D/2
  • D/3
  • D/4
  • D/5
Q.20

Which one of the following statements is correct ?

  • The canal system and the drainage system are complementary
  • The canal system runs on ridges, gets divided into smaller channels and spreads its water on the land
  • The drainage system runs along the lowest line, collects drainage water from the slopes and joins the main stream
  • All the above.
Q.21

If water table is comparatively high, the irrigation canal becomes useless, due to

  • large amount of seepage
  • water logging of the cultivated areas
  • uncertain water demand
  • spread of malaria
  • all the above.
Q.22

Garnett's diagrams are used for graphical solution of design equations of a canal by

  • Lacey's theory
  • Kennedy's theory
  • Gibb's theory
  • Lindlay theory.
Q.23

A river is said to be of

  • aggrading type if it builds up its bed to a certain slope
  • degrading type if it cuts its bed to a certain slope
  • meandering type if it flows in sinuous curve
  • all the above.
Q.24

A current meter measures the velocity of flow, if it is held

  • on the surface of water
  • at the bottom of channel
  • at any point within the cross-section
  • none of these.
Q.25

A land is said to be water-logged if its soil pores within

  • a depth of 40 cm are saturated
  • a depth of 50 cm are saturated
  • root zone of the crops are saturated
  • all the above.
Q.26

In a concrete canal the approximate permissible velocity of water should not exceed

  • 0.5 m/sec
  • 1 m/sec
  • 1.5 m/sec
  • 2 m/sec
  • 2.5 m/sec
Q.27

In case of a trapezoidal notch fall

  • top width of the notch is kept between 3/4 th of full water depth above the sill of the notch
    20-15-96-1.png
  • top length of the piers should not be less than their thickness
    20-15-96-1.png
  • splay up stream from the notch section is 45°
    20-15-96-1.png
  • splay down stream from the notch section is
  • all the above.
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