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.
To hold hydraulic jumps, baffle walls are provided in
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Sarda type falls -
English type falls -
Montague type falls -
Vertical type falls.
The ratio of the rate of change of discharge of an outlet and parent channel, is known as
-
efficiency -
sensitivity -
flexibility -
modular limit.
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
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.
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
When a canal is carried over a natural drainage, the structure provided, is known as
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syphon -
aqueduct -
super passage -
syphon-aqueduct.
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
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an aqueduct -
a syphon aqueduct -
a super passage -
a syphon.
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls
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of R.C.C. or steel plate 8 cm thick 
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of height l/3rd to l/4th the depth of water in the main canal
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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.
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.
The ratio of the rate of change of discharge of an outlet and parent channel, is known as
-
efficiency -
sensitivity -
flexibility -
modular limit.
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.
Pick up the correct statement from the following:
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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.
The ratio of the rate of change of discharge of an outlet and parent channel, is known as
-
efficiency -
sensitivity -
flexibility -
modular limit.
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
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.
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
In a syphon aqueduct
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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.
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
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D -
D/2 -
D/3 -
D/4 -
D/5
Which one of the following statements is correct ?
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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.
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.
Garnett's diagrams are used for graphical solution of design equations of a canal by
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Lacey's theory -
Kennedy's theory -
Gibb's theory -
Lindlay theory.
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.
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.
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.
In a concrete canal the approximate permissible velocity of water should not exceed
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0.5 m/sec -
1 m/sec -
1.5 m/sec -
2 m/sec -
2.5 m/sec
In case of a trapezoidal notch fall
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top width of the notch is kept between 3/4 th of full water depth above the sill of the notch 
-
top length of the piers should not be less than their thickness
-
splay up stream from the notch section is 45°
-
splay down stream from the notch section is 
-
all the above.