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Recent questions and answers in Hydraulics
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GATE Civil 2021 Set 2  Question: 31
A rectangular open channel of $\text{6 m}$ width is carrying a discharge of $20 \text{ m$^{3}$/s}$. Consider the acceleration due to gravity as $9.81 \text{ m/s}^{2}$ and assume water as incompressible and inviscid. The depth of flow in the channel at which the ... the given discharge will then be $\text{0.82 m}$ $\text{1.04 m}$ $\text{2.56 m}$ $\text{3.18 m}$
asked
Mar 1
in
Hydraulics
by
jothee
(
5.2k
points)
gatecivil2021set2
flowmeasurementinchannels
rectangularchannels
0
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0
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2
GATE Civil 2021 Set 1  Question: 9
If water is flowing at the same depth in most hydraulically efficient triangular and rectangular channel sections then the ratio of hydraulic radius of triangular section to that of rectangular section is $\frac{1}{\sqrt{2}}$ $\sqrt{2}$ $1$ $2$
asked
Feb 20
in
Hydraulics
by
Arjun
(
8.7k
points)
gatecivil2021set1
flowmeasurementschannels
triangularrectangularhydraulics
0
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0
answers
3
GATE Civil 2021 Set 1  Question: 32
A fluid flowing steadily in a circular pipe of radius $\text{R}$ has a velocity that is everywhere parallel to the axis (centerline) of the pipe. The velocity distribution along the radial direction is $V_{r}=U\left ( 1\dfrac{r^{2}}{R^{2}} \right )$, where $\text{r}$ ... fluid in the pipe is $\frac{U}{2}$ $\frac{U}{3}$ $\frac{U}{4}$ $\left(\frac{5}{6}\right)U$
asked
Feb 20
in
Hydraulics
by
Arjun
(
8.7k
points)
gatecivil2021set1
flowmeasurementinpipe
0
votes
0
answers
4
GATE2020CE114
Uniform flow with velocity $U$ makes an angle $\theta$ with $y$axis, as shown in the figure The velocity potential $(\phi)$, is $\pm U(x\sin\theta+y\cos\theta)$ $\pm U(y\sin\thetax\cos\theta)$ $\pm U(x\sin\thetay\cos\theta)$ $\pm U(y\sin\theta+x\cos\theta)$
asked
Feb 28, 2020
in
Hydraulics
by
jothee
(
5.2k
points)
gate2020ce1
uniformflow
0
votes
0
answers
5
GATE2020CE124
A $4\:m$ wide rectangular channel carries $6\:m^3/s$ of water. The Manning’s ‘$n$’ of the open channel is $0.02$. Considering $g=9.81\:m/s^2$, the critical velocity of flow (in $m/s$, round off to two decimal places ) in the channel, is ____________.
asked
Feb 28, 2020
in
Hydraulics
by
jothee
(
5.2k
points)
gate2020ce1
flowmeasurementinchannels
numericalanswers
0
votes
0
answers
6
GATE2020CE136
Water flows at the rate of $12\:m^3/s$ in a $6\:m$ wide rectangular channel. A hydraulic jump is formed in the channel at a point where the upstream depth is $30\:cm$ (just before the jump). Considering acceleration due to gravity as $9.81\:m/s^2$ and density of water as $1000\:kg/m^3$, the energy loss in the jump is $114.2\:kW$ $114.2\:MW$ $141.2\:h.p.$ $141.2\:J/s$
asked
Feb 28, 2020
in
Hydraulics
by
jothee
(
5.2k
points)
gate2020ce1
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
7
GATE2020CE151
A circular water tank of $2\:m$ diameter has a circular orifice of diameter $0.1\:m$ at the bottom. Water enters the tank steadily at a flow rate of $20\:litre/s$ and escapes through the orifice. The coefficient of discharge of the orifice is $0.8$. ... losses. The height of the water level (in $m$, round off to two decimal places) in the tank at the steady state, is ______.
asked
Feb 28, 2020
in
Hydraulics
by
jothee
(
5.2k
points)
gate2020ce1
numericalanswers
frictionloss
flowmeasurements
0
votes
0
answers
8
GATE2020 CE250
A hydraulic jump occurs in a triangular $\text{(Vshaped)}$ channel with side slopes $1:1$ (vertical to horizontal). The sequent depths are $0.5\: m$ and $1.5\: m$. The flow rate (in $m^3/s$, round off to two decimal places) in the channel is ________.
asked
Feb 13, 2020
in
Hydraulics
by
jothee
(
5.2k
points)
gate2020ce2
numericalanswers
hydraulicjump
0
votes
0
answers
9
GATE2017 CE27
If a centrifugal pump has an impeller speed of $N$ (in rpm), discharge $Q$ (in $m^3/s$) and the total head $H$ (in $m$), the expression for the specific speed $N_s$ of the pump is given by $N_s = \dfrac{NQ^{0.5}}{H^{0.5}} \\$ $N_s = \dfrac{NQ^{0.5}}{H}\\$ $N_s = \dfrac{NQ^{0.5}}{H^{0.75}} \\$ $N_s = \dfrac{NQ}{H^{0.5}}$
asked
Aug 7, 2019
in
Hydraulics
by
gatecse
(
4k
points)
gate2017ce2
hydraulics
waterresourcesengineering
specificspeedofpumps
0
votes
0
answers
10
GATE2017 CE249
Water is pumped at a steady uniform flow rate of $0.01 \: m^3/s$ through a horizontal smooth circular pipe of $100$ mm diameter. Given that the Reynolds number is $800$ and $g$ is $9.81 \: m/s^2$, the head loss (in meters, up to one decimal place) per km length due to friction would be _______
asked
Aug 7, 2019
in
Hydraulics
by
gatecse
(
4k
points)
gate2017ce2
numericalanswers
hydraulics
waterresourcesengineering
uniformflow
0
votes
0
answers
11
GATE2019 CE1: 13
In a rectangular channel, the ratio of the velocity head to the flow depth for critical flow condition, is $\dfrac{1}{2}\\$ $\dfrac{2}{3} \\$ $\dfrac{3}{2} \\$ $2$
asked
Feb 14, 2019
in
Hydraulics
by
Arjun
(
8.7k
points)
gate2019ce1
flowmeasurementinchannels
hydraulics
waterresourcesengineering
0
votes
0
answers
12
GATE2019 CE2: 27
Consider the hemispherical tank of radius $13 \: m$ as shown in the figure (not drawn to the scale). What is the valume of water (in $m^3$) when the depth of water at the centre of the tank is $6 \: m$? $78 \pi$ $156 \pi$ $396 \pi$ $468 \pi$
asked
Feb 12, 2019
in
Hydraulics
by
Arjun
(
8.7k
points)
gate2019ce2
hydraulics
waterresourcesengineering
0
votes
0
answers
13
GATE2019 CE2: 47
A confined aquifer of $15 \: m$ constant thickness is sandwiched between two aquicludes as shown in the figure (not drawn to scale). The heads indicated by two piezometers P and Q are $55.2 \: m$ and $34.1 \: m$, respectively. The aquifer has a ... taken by the water to travel through the aquifer from piezometer location P to Q (in days, round off to $1$ decimal place) is ______
asked
Feb 12, 2019
in
Hydraulics
by
Arjun
(
8.7k
points)
gate2019ce2
numericalanswers
hydraulics
waterresourcesengineering
0
votes
0
answers
14
GATE2019 CE2: 48
At the foot of a spillway, water flows at a depth of $23 \: cm$ with a velocity of $8.1 \: m/s$, as shown in the figure. The flow enters as an $M3$ profile in the long wide rectangular channel with bed slope $= \frac{1}{1800}$ and Manning's $n=0.015$ ... $y_1$ (in $m$, round off to $2$ decimal places) is _________
asked
Feb 12, 2019
in
Hydraulics
by
Arjun
(
8.7k
points)
gate2019ce2
numericalanswers
flowmeasurementinchannels
hydraulics
waterresourcesengineering
0
votes
0
answers
15
GATE2016247
A $3$ m wide rectangular channel carries a flow of $6 \: m^3 /s$. The depth of flow at a section $P$ is $0.5 \: m$. A flattopped hump is to be placed at the downstream of the section $P$. Assume negligible energy loss between section $P$ and hump, and ... $m$) which will not change the depth of flow at section P is ________
asked
Mar 28, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2016ce2
numericalanswers
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
16
GATE2016116
The prejump Froude Number for a particular flow in a horizontal rectangular channel is $10$. The ratio of sequent depths (i.e., postjump depth to prejump depth) is ______
asked
Mar 28, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
numericalanswers
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
17
GATE2015217
A nozzle is so shaped that the average flow velocity changes linearly from $1.5$ m/s at the beginning to $15$ m/s at its end in a distance of $0.375$m. The magnitude of the convective acceleration (in $m/s^2$ ) at the end of the nozzle is ________.
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2015ce2
numericalanswers
hydraulics
waterresourcesengineering
nozzle
0
votes
0
answers
18
GATE2015218
A hydraulic jump takes place in a frictionless rectangular channel. The prejump depth is $y_p$. The alternate and sequent depths corresponding to $y_p$ are $y_a$ and $y_s$ respectively. The correct relationship among $y_p, \: y_a$ and $y_s$ is: $y_a < y_s < y_p$ $y_p < y_s < y_a$ $y_p < y_s = y_a$ $y_p = y_s = y_a$
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2015ce2
hydraulics
waterresourcesengineering
hydraulicjump
0
votes
0
answers
19
GATE2015219
The relationship between porosity $(\eta)$, specific yield $(S_y)$ and specific retention $(S_\tau)$ of an unconfined aquifer is: $S_y+S_\tau = \eta$ $S_y+ \eta = S_\tau$ $S_\tau+ \eta = S_y$ $S_y+ S_\tau + \eta =1$
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2015ce2
hydraulics
waterresourcesengineering
0
votes
0
answers
20
GATE2015144
A hydraulic jump is formed in a $2$ m wide rectangular channel which is horizontal and frictionless. The postjump depth and velocity are $0.8$ , and $1$ m/s, respectively. The prejump velocity is ________ m/s. (use $g=10\:m/s^2$)
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2015ce1
numericalanswers
hydraulics
waterresourcesengineering
hydraulicjump
0
votes
0
answers
21
GATE2015145
A short reach of a $2$ m wide rectangular open channel has its bed level rising in the direction of flow at a slope of $1$ in $10000$. It carries a discharge of $4 m^3/s$ and its Manning's roughness coefficient is $0.01$. The flow in this reach is gradually varying. ... $dy/dx$, at this section is _______ (use $g=10\:m/s^2$).
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2015ce1
numericalanswers
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
22
GATE2015146
The drag force, $F_D$, on a sphere kept in a uniform flow field, depends on the diameter of the sphere $D$; flow velocity, $V$, fluid density, $\rho$; and dynamic viscosity, $\mu$. Which of the following options represents the nondimensional parameters which could be used to analyze this ... $\dfrac{_{\rho}VD}{\mu} \\$ $\dfrac{F_D}{_{\rho}V^3D^3}$ and $\dfrac{\mu}{_{\rho}VD}$
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2015ce1
hydraulics
waterresourcesengineering
dimensionalanalysis
0
votes
0
answers
23
GATE2014243
A rectangular channel of $2.5$ m width is carrying a discharge of $4 \: m^3/s$. Considering that acceleration due to gravity as $9.81 \: m/s^2$, the velocity of flow (in m/s) corresponding to the critical depth (at which the specific energy is minimum) is _________
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2014ce2
numericalanswers
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
24
GATE2014241
A horizontal nozzle of $30$ mm diameter discharges a steady jet of water into the atmosphere at a rate of $15$ litres per second. The diameter of inlet to the nozzle is $100$ mm. The jet impinges normal to a flat stationary plate held close to the nozzle end. ... considering the density of water as $1000 \: kg/m^3$, the force exerted by the jet (in N) on the plate is __________
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2014ce2
numericalanswers
hydraulics
waterresourcesengineering
0
votes
0
answers
25
GATE2014217
A plane flow has velocity components $u=\dfrac{x}{T_1}$, $v=\dfrac{y}{T_2}$ and $w=0$ along $x,y$ and $z$ directions respectively, where $T_1( \neq 0)$ and $T_2 (\neq 0)$ are constants having the dimension of time. The given flow is incompressible if $T_1=T_2 \\$ $T_1= \dfrac{T_2}{2} \\$ $T_1=\dfrac{T_2}{2} \\$ $T_1=T_2$
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2014ce2
hydraulics
waterresourcesengineering
0
votes
0
answers
26
GATE2014147
The potable water is prepared from turbid surface water by adopting the following treatment sequence. Turbid surface water $\rightarrow$ Coagulation $\rightarrow$ Flocculation $\rightarrow$ Sedimentation $\rightarrow$ Filtration $\rightarrow$ Disinfection ... $\rightarrow$ Coagulation $\rightarrow$ Disinfection $\rightarrow$ Filtration $\rightarrow$ Storage & Supply
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2014ce1
hydraulics
waterresourcesengineering
turbidsurfacewater
0
votes
0
answers
27
GATE201415
With reference to the conventional Cartesian $(x,y)$ coordinate system, the vertices of a triangle have the following coordinates: $(x_1, y_1) = (1,0)$; $(x_2,y_2) = (2,2)$; and $(x_3,y_3)=(4,3)$. The area of the triangle is equal to $\dfrac{3}{2} \\$ $\dfrac{3}{4} \\$ $\dfrac{4}{5} \\$ $\dfrac{5}{2}$
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2014ce1
hydraulics
waterresourcesengineering
triangles
0
votes
0
answers
28
GATE Civil 2013  Question: 16
For subcritical flow in an open channel, the control section for gradually varied flow profiles is at the downstream end at the upstream end at both upstream and downstream ends at any immediate section
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Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2013ce
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
29
GATE Civil 2012  Question: 40
Group I contains parameters and GroupII lists methods/instruments. ... $P4, \: Q2, \: R3, \: S1$ $P1, \: Q3, \: R2, \: S4$
asked
Mar 25, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2012ce
hydraulics
waterresourcesengineering
velocitytriangles
0
votes
0
answers
30
GATE Civil 2012  Question: 39
The top width and the top depth of flow in a triangular channel were measured as $4$ m and $1$ m, respectively. The measured velocities on the centre line at the water surface, $0.2$ m and $0.8$ m below the surface are $0.7$ m/s, $0.6$ ... Using twopoint method of velocity measurement, the discharge (in $m^3/s$) in the channel is $1.4$ $1.2$ $1.0$ $0.8$
asked
Mar 25, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2012ce
hydraulics
waterresourcesengineering
velocitytriangles
0
votes
0
answers
31
GATE Civil 2012  Question: 17
A rectangular open channel of width $5.0$ m is carrying a discharge of $100 \: m^3/s$ The Froude number of the flow is $0.8$. The depth of flow (in m) in the channel is $4$ $5$ $16$ $20$
asked
Mar 25, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2012ce
hydraulics
waterresourcesengineering
flowmeasurementinchannel
0
votes
1
answer
32
GATE2018 CE1: 48
Rainfall depth over a watershed is monitored through six number of well distributed rain gauges. Gauged data are given below ... The Thiessen mean value (in mm, up to one decimal place) of the rainfall is _____
answered
Feb 18, 2018
in
Hydraulics
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pushpendratiwari1011
(
1k
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gate2018ce1
numericalanswers
hydraulics
waterresourcesengineering
0
votes
1
answer
33
GATE2018 CE1: 23
A $10$ m wide rectangular channel carries a discharge of $20 \: m^3/s$ under critical condition. Using $g=9.81 m/s^2$, the specific energy (in m, up to two decimal places) is _____
answered
Feb 18, 2018
in
Hydraulics
by
pushpendratiwari1011
(
1k
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gate2018ce1
numericalanswers
hydraulics
waterresourcesengineering
channelsenergy
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