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Recent questions and answers in Hydraulics
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1
GATE2020CE112
Velocity of flow is proportional to the first power of hydraulic gradient in Darcy’s law. This law is applicable to laminar flow in porous media transitional flow in porous media turbulent flow in porous media laminar as well as turbulent flow in porous media
asked
Feb 28
in
Hydraulics
by
jothee
(
2.7k
points)
gate2020ce1
hydraulics
waterresourcesengineering
0
votes
0
answers
2
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
in
Hydraulics
by
jothee
(
2.7k
points)
gate2020ce1
hydraulics
waterresourcesengineering
uniformflow
0
votes
0
answers
3
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
in
Hydraulics
by
jothee
(
2.7k
points)
gate2020ce1
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
4
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
(
3.9k
points)
gate2017ce2
hydraulics
waterresourcesengineering
specificspeedofpumps
0
votes
0
answers
5
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
(
3.9k
points)
gate2017ce2
numericalanswers
hydraulics
waterresourcesengineering
uniformflow
0
votes
0
answers
6
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
(
2.8k
points)
gate2019ce1
flowmeasurementinchannels
hydraulics
waterresourcesengineering
0
votes
0
answers
7
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
(
2.8k
points)
gate2019ce2
hydraulics
waterresourcesengineering
0
votes
0
answers
8
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
(
2.8k
points)
gate2019ce2
numericalanswers
hydraulics
waterresourcesengineering
0
votes
0
answers
9
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
(
2.8k
points)
gate2019ce2
numericalanswers
flowmeasurementinchannels
hydraulics
waterresourcesengineering
0
votes
0
answers
10
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
11
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
12
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
13
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
14
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
15
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
16
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
17
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
18
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
19
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
20
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
21
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
22
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
23
GATE201316
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
asked
Mar 26, 2018
in
Hydraulics
by
Milicevic3306
(
11.9k
points)
gate2013ce
hydraulics
waterresourcesengineering
flowmeasurementinchannels
0
votes
0
answers
24
GATE201240
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
25
GATE201239
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, $0.6$ m/s and $0.4$ m/s, respectively. 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
26
GATE201217
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
27
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
by
pushpendratiwari1011
(
1k
points)
gate2018ce1
numericalanswers
hydraulics
waterresourcesengineering
0
votes
1
answer
28
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
points)
gate2018ce1
numericalanswers
hydraulics
waterresourcesengineering
channelsenergy
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