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The side slope of Cipolletti weir is generally kept
1 to 3
1 : 5
1 to 4
1 to 2
Pick up the incorrect statement from to following regarding triangular notch
Only one reading (i.e. H) is required for computation of discharge
For measuring low discharge, it gives more accurate result
None of these.
Ventilation is necessary
If velocities of fluid particles vary from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be
uniform flow
turbulent flow
laminar
non-uniform flow.
An error of 1% in measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to
2.25%
1.25%
1.75%
1.5%
Mercury is generally used in barometers because
the height of the barometer will be less
it is a best liquid
both (A) and (B) above
its vaour pressure is practically zero
both (b) and (c) above.
A rectangular channel 6 m wide and 3 m deep and having a bed slope as 1 in 2000 is runningfull.
If Chezy's constant C = 54.8, pick up the correct specification of the channel from the following
All the above.
hydraulic mean depth = 1.5 m
Velocity of flow = 1.5 m/sec
Rate of flow = 27 m3/sec
The flow in a channel is said to be non-uniform, if
All the above.
free water surface of an open channel is not parallel to the bed of channel
head needed to overcome frictional reistance is less than the drop in elevation of channel bed
head needed to overcome frictional resistance is more than the drop in elevation of channel bed
'Flow net' can be drawn only if the flow is
None of these.
turbulent
rotational
Distortion
The value of kinetic energy correction factor
(a) for a laminar flow through a circular pipe, is
0.5
l.5
2.5
2.0
1.0
The ratio of inertia force of a flowing fluid and the viscous force of the liquid is called
Weber's number.
Euler's number
Renold's number
Froude's number
While applying the Bernoulli's equation = total head, the work any section done on the flow system, if any
is added on the left side of the equation
None of these.
is added on the right side of the equation
is ignored
Equation of continuity of flow is based on the principle of conservation of
mass
None of these.
Momentum
Force
Total pressure on the top of a closed cylindrical vessesl completely filled with liquid, is directly proportional to
None of these.
(radius)2
radius
(radius)3
(radius)4
If jet of water coming out from a nozzle with a velocity 9.81 m/s, the angle of elevation being 30°, the time to reach the highest point is
0.50 s
1.0 s
0.25 s
1.5 s.
The discharge over a Cipolletti weir of length 2.185 m when the head over the weir is 1 m, is
3.0 m3
2.5 m3
2.0 m3
4.0 m3.
The instrument used for measuring the velocity of flow, is known as
Pitot tube
Venturimeter
Orifice meter
None of these.
The most efficient channel section, is
Rectangular
half hexagon in the form of trapezoid.
triangular
Semi-circular
Most economical section of a triangular channel, is
Right angled triangle
Equilateral Triangle
isosceles triangle with 45° vertex angle
right angled triangle with equal sides.
For a most economical rectangular channel, the width of the channel must be
equal to depth of flow
None of these.
half the depth of flow
twice the depth of flow
The velocity of the fluid particle at the centre of the pipe section, is
equal throughout
maximum
None of these.
Minimum
1
2
7
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