JKSSB
JE CIVIL PREVIOUS PAPERS
JAL
SHAKTI
05
DEC 2022 (SHIFT-I)
(FLUID
MEVHANICS AND HYDRAULICS)
Q.NO.1.
For
laminar and turbulent flow, the Reynolds number in an open channel is defined
as
A.
Re = ρVm / µ
B.
Re = ρV2m2 / µ
C.
Re = ρVm2 / µ
D.
Re = ρV2m / µ
Ans.
A
Q.NO.2.
The
ratio between the actual velocity of a jet of liquid at vena-contracta and the
theoretical velocity of jet is known as
A.
Co-efficient of discharge, Cd
B.
Co-efficient of contraction, Cc
C.
Co-efficient of velocity, Cv
D.
None of these
Ans.
C
Q.NO.3.
Hydraulic
gradient line may fall or rise depending upon …………changes.
A.
Time
B.
Mass
C.
Pressure
D.
Height
Ans.
C
Q.NO.4.
Specific
speed of radical flow (slow) turbines in centrifugal pumps is
A.
10-25
B.
25-45
C.
45-70
D.
70-135
Ans.
A
Q.NO.5.
When
the Froude number is less than 1, then flow is called
A.
Tranquil
B.
Critical
C.
Torrential
D.
None of these
Ans.
A
Q.NO.6.
The
study of fluid motion with the forces causing flow is called dynamics of fluid
flow, which is analysed by…………
A.
Newtons 1st law of motion
B.
Newtons 2nd law of motion
C.
Newtons 3rd law of motion
D.
Pascal`s law
Ans.
B
Q.NO.7.
Venturi
meter is a device that is based on ……….and used to determine the rate of flow
through a pipe.
A.
Bernoulli`s principle
B.
Buoyancy`s principle
C.
Momentum of mass
D.
Momentum of energy
Ans.
A
Q.NO.8.
Intensity
of pressure for fluid at rest is equal in all directions.
A.
Pascal`s law
B.
Newtons 1st law
C.
Newtons 2nd law
D.
Newtons 3rd law
Ans.
A
Q.NO.9.
What
are the different types of efficiencies in hydraulic pumps?
A.
Manometric efficiency
B.
Mechanical efficiency
C.
manometric efficiency
D.
All of these
Ans.
D
Q.NO.10.
For
the different orifices, depending on the shape and size of orifice and the head
under which flow takes place, the value of coefficient of contraction, Cc is
varying from
A.
0.95 to 0.99
B.
0.61 to 0.69
C.
0.61 to 0.65
D.
0.85 to 0.87
Ans.
B
Q.NO.11.
Design
a regime channel for a discharge of 90 cumecs and silt factor is 1.3 use lacy`s
theory
A.
Depth = 2.2m, Base width = 40.5m, Slope =
1/4670
B.
Depth = 2.12m, Base width = 40.42m, Slope
= 1/4675
C.
Depth = 2.135m, Base width = 40.3m, Slope
= 1/4676
D.
Depth = 2.123m, Base width = 40.1m, Slope
= 1/4672
Ans.
A
Q.NO.12.
What
is syphon in pipe flow?
A.
A long-bent pipe used to transfer a liquid
from one reservoir at a lower level to another reservoir at higher level, when
two reservoirs are separated by high level ground
B.
A long-bent pipe used to transfer a liquid
from one reservoir at a lower level to another reservoir at higher level, when
two reservoirs are separated but placed at by same level ground
C.
A long-bent pipe used to transfer a liquid
from one reservoir at a higher level to another reservoir at lower level, when
two reservoirs are separated by high level ground
D.
None of these
Ans.
C
Q.NO.13.
Drag
coefficient is independent of Reynold`s number in …………zone
A.
Laminar
B.
Turbulent
C.
Transition
D.
None of these
Ans.
D
Q.NO.14.
The
losses of energy in pipes is due to the
A.
Friction of surface
B.
Sudden enlargement of contraction of area
C.
Any obstruction in the path of the flow
D.
All of these
Ans.
D
Q.NO.15.
The
ratio of dynamic viscosity to the density of fluid is known as its
A.
Mass density
B.
Weight density
C.
Kinematic viscosity
D.
Relative density
Ans.
C
JKSSB
JE CIVIL PREVIOUS PAPERS
JAL
SHAKTI
05
DEC 2022 (SHIFT-II)
(FLUID
MECHANICS AND HYDRAULICS)
Q.NO.16.
The
SI unit of kinematic viscosity is
A.
Kg/m3
B.
KN/m3
C.
m3/kg
D.
m2/s
Ans.
D
Q.NO.17.
The
open channel flow is caused due to………………?
A.
Centrifugal force
B.
Centripetal force
C.
Horizontal force
D.
Gravity
Ans.
D
Q.NO.18.
If
Reynolds number is below 500, then the flow is called
A.
Turbulent
B.
Transitional
C.
Laminar
D.
None of these
Ans.
C
Q.NO.19.
For
perfect gas, the equation of state is
A.
p/ρ = (RT)2
B.
p/P = (RT)2
C.
P*ρ = RT
D.
p/ρ = RT
Ans.
D
Q.NO.20.
If
the velocities at two points of the streamline and pressure at only one point.
Then how to find the unknown pressure at the other point of the fluid?
A.
By using Bernoulli`s equation
B.
By using Buoyancy`s equation
C.
By using momentum`s law
D.
None of these
Ans.
A
Q.NO.21.
For
the different orifices, depending on the shape and size of orifice and the
j=head under which flow takes place. The value of coefficient of velocity Cv
is varies from
A.
0.95 to 0.99
B.
0.61 to 0.69
C.
0.61 to 0.65
D.
0.85 to 0.87
Ans.
A
Q.NO.22.
In
the hydraulic gradient line, the total energy line always drops in the ………of
flow due to various losses.
A.
Same direction
B.
Opposite direction
C.
Upward direction
D.
Downward direction
Ans.
A
Q.NO.23.
When
the depth of flow is more than critical depth, then it is known as
A.
Subcritical flow
B.
Supercritical flow
C.
Critical flow
D.
None of these
Ans.
A
Q.NO.24.
In
the hydraulic pumps, priming is the process
A.
To start a pump, first it is filled with
air
B.
To start a pump, first it is filled with
petrol
C.
To start a pump, first it is filled with
water
D.
To start a pump, first it is filled with
oil
Ans.
C
Q.NO.25.
For
the different orifices, depending on the shape and size of orifice and the head
under which flow takes place. The value of coefficient of discharge, Cd
is varies from
A.
0.9 to 0.99
B.
0.61 to 0.69
C.
0.61 to 0.65
D.
0.85 to 0.87
Ans.
C
Q.NO.26.
What
are the different types of directions of water?
A.
Radial flow
B.
Mixed flow
C.
Axial flow
D.
All of these
Ans.
D
Q.NO.27.
Darcy’s
Weisbeck formula head loss due to friction in pipe flow is
A.
hf = 4flv2/2gd
B.
hf = 4flv3/2gd
C.
hf = 2flv2/4gd
D.
hf = 2flv3/4gd
Ans.
A
Q.NO.28.
The
capillary rise or fall of liquid is given by
A.
h = 2*
B.
h = 
C.
h = 
D.
h = 4*
Ans.
D
Q.NO.29.
Which
of the following is used to find the velocity of a flowing fluid at any point
in a pipe or a channel.
A.
Orifice meter
B.
Venturi meter
C.
Classic tube
D.
Pitot tube
Ans.
D
Q.NO.30.
a
critical activity has
A.
Average float
B.
Zero float
C.
Maximum float
D.
Minimum float
Ans.
B
Q.NO.31.
What
is the surface tension of mercury at 20oC
A.
72.8 dynes per cm
B.
29.0 dynes per cm
C.
245 dynes per cm
D.
75.6 dynes per cm
Ans.A
JKSSB
JE CIVIL PREVIOUS PAPERS
JAL
SHAKTI
06
DEC 2022 (SHIFT-I)
(FLUID
MECHANICS AND HYDRAULICS)
Q.NO.32.
If
Reynolds number is between 500 to 2000, then the flow is called
A.
Turbulent
B.
Transitional
C.
Laminar
D.
None of these
Ans.
B
Q.NO.33.
The
range of overall efficiency lies between is
A.
0.71 to 0.86
B.
0.50 to 0.71
C.
0.71 to 0.98
D.
None of these
Ans.
A
Q.NO.34.
…………is
the pressure in which absolute vacuum pressure is taken as datum while …………….is
the pressure in which the atmospheric pressure is taken as datum
A.
Absolute pressure, gauge pressure
B.
Gauge pressure, absolute pressure
C.
Gauge pressure, atmospheric pressure
D.
Atmospheric pressure, gauge pressure
Ans.
A
Q.NO.35.
In
chezy`s formula V = C
, i(head loss due to
friction per unit length) in pipe flow is expressed as
A.
i = L/hf
B.
i = 
C.
i = hf/L
D.
i = (hf/L)2
Ans.
C
Q.NO.36.
SI
unit of surface tension is
A.
Dynes/cm
B.
Dynes-s/cm2
C.
KN/m2
D.
KN/m3
Ans.
A
Q.NO.37.
Surface
tension is expressed in
A.
m/N
B.
N/m
C.
N/m2
D.
m2/N
Ans.
B
Q.NO.38.
The
steady flow in open channels is state that
A.
The flow characteristics such as depth of
flow, velocity of flow, rate of flow, at any point changes with respect to time
B.
For a given length of a channel, if the
depth, slope, cross section and velocity of the flow are constant
C.
The flow characteristics such as depth of
flow, velocity of flow, rate of flow, at any point do not changes with respect
to time
D.
For a given length of a channel, if the
depth, slope, cross section and velocity of the flow are not constant
Ans. C
Q.NO.39. The ratio of the area of the jet at
vena-contracta to the area of the orifice, is known as
A. Co-efficient
of discharge, Cd
B. Co-efficient
of contraction, Cc
C. Co-efficient
of velocity, Cv
D. None
of these
Ans.
B
Q.NO.40.
Laboratory
methods to determine coefficient of permeability is/are
A.
Pumping out test
B.
Pumping in test
C.
Falling head permeability test
D.
None of these
Ans.
C
Q.NO.41.
According
to the heads of centrifugal pump, the head which has to be developed by a pump
to deliver water from the sump into the tank is called
A.
Static head
B.
Total head
C.
Manometric head
D.
All of these
Ans. C
Q.NO.42. Theoretical velocity of jet of water
from orifice is given by
A. V
= 
B. V
= 
C. V
= 
D. V
= 
Ans.
A
Q.NO.43.
Hydraulic
jump in flow in open channels is state that
A.
When flow is unstable and it transforms
into a supercritical flow, then depth of flow decreases
B.
When flow is unstable and it transforms
into a subcritical flow, then depth of flow increases
C.
When water flow jumps to lower level from
higher level
D.
None of these
Ans.
B
Q.NO.44.
The
volume of a fluid per unit mass is called
A.
Mass density
B.
Weight density
C.
Specific volume
D.
Relative density
Ans.
C
Q.NO.45.
In
the flow through pipes, the equivalent pipe is defined as
A. A
pipe of no-uniform diameter having loss of head and flow is not equal to the
loss of head and flow of compound pipe made up of several pipes of different
diameters and lengths
B. A
pipe of uniform diameter having loss of head and flow equal to the loss of head
and flow of compound pipe made up of several pipes of different diameters and
lengths
C. A
pipe of no-uniform diameter having loss of head and flow is not equal to the
loss of head and flow of compound pipe made up of several pipes of same
diameters and lengths
D. A
pipe of uniform diameter having loss of head and flow equal to the loss of head
and flow of compound pipe made up of several pipes of same diameters and
lengths
Ans.
B
JKSSB
JE CIVIL PREVIOUS PAPERS
JAL
SHAKTI
06
DEC 2022 (SHIFT-II)
(FLUID
MEVHANICS AND HYDRAULICS)
Q.NO.46.
…………is
the property of water which exist in the surface film of water tending to
contract the contained volume into a form having a minimum superficial are
possible.
A.
Capillary rise
B.
Capillary tension
C.
Capillary potential
D.
Surface tension
Ans.
D
Q.NO.47.
If
Reynolds number is more than 2000, then the flow is called
A.
Turbulent
B.
Transitional
C.
Laminar
D.
None of these
Ans.
A
Q.NO.48.
Which
of the following are the classifications of centrifugal pumps?
A.
Working heads
B.
Specific speed
C.
Disposition of shaft
D.
All of these
Ans.
D
Q.NO.49.
The
ratio of the actual discharge from an orifice to the theoretical discharge from
the orifice, is known as
A.
Co-efficient of discharge, Cd
B.
Co-efficient of contraction, Cc
C.
Co-efficient of velocity, Cv
D.
None of these
Ans.
A
Q.NO.50.
How
many types of hydraulic coefficients are there?
A.
Two
B.
Three
C.
Four
D.
one
Ans.
B
Q.NO.51.
As
per Darcy’s law in saturated soil
A.
Rate of flow per unit time is proportional
to total cross section area of soil mass
B.
Rate of flow per unit time is proportional
to hydraulic gradient
C.
Rate of flow per unit time is proportional
to height of capillary rise
D.
Rate of flow per unit time is proportional
to atmospheric pressure
Ans.
B
Q.NO.52.
According
to the heads of centrifugal pump: gross head, effective head of dynamic head
are another name of …………………
A.
Static head
B.
Total head
C.
Manometric head
D.
Suction head
Ans.
B
Q.NO.53.
The
bulking of sand is due to
1. viscosity
2. air void
3. surface moisture
A.
Only 1
B.
Only 3
C.
Only 2 and 3
D.
Only 1 and 3
Ans.
B
Q.NO.54.
Which
are the following are the types of flow?
A.
Steady flow
B.
Uniform flow
C.
Compressible flow
D.
All of these
Ans.
D
Q.NO.55.
The
ratio of inertia force and gravitational force is called
A.
Euler`s number
B.
Froude`s number
C.
Reynolds number
D.
Stokes number
Ans. B
Q.NO.56. ………………. tends to occur in large
diameter pipes in which fluid flows with velocity.
A. Turbulent
flow
B. Laminar
flow
C. Both
turbulent flow and laminar flow
D. None
of these
Ans.
A
Q.NO.57.
The
Dupit`s equation tells, if the length of equivalent pipe is known, the diameter
of equivalent pipe can be calculated or vice versa. According to this equation
which of the following equation is correct?
A.
L/d = L1/d1 + L2/d2
+ L3/d3
B.
L/d5 = L1/d15
+ L2/d25 + L3/d35
C.
L/d3 = L1/d13
+ L2/d23 + L3/d33
D.
L/d4 = L1/d14
+ L2/d24+ L3/d34
Ans.
B
Q.NO.58.
which
type of meter is used to measure gauge pressure?
A.
Multimeter
B.
Ammeter
C.
Piezometer
D.
None of these
Ans.
C
Q.NO.59.
A
device for measuring the rate of a flow of a fluid flowing through a pipe is
known as
A.
Orifice meter
B.
Venturi meter
C.
Pitot tube
D.
None of these
Ans.
B
Q.NO.60.
The
uniform flow in open channels is state that
A.
The flow characteristics such as depth of
flow, velocity of flow, rate of flow, at any point changes with respect to
time.
B.
For a given length of a channel, if the
depth, slope, cross section and the velocity of the flow are constant
C.
The flow characteristics such as depth of
flow, velocity of flow, rate of flow, at any point do not change with respect
to time.
D.
For a given length of a channel, if the
depth, slope, cross section and the velocity of the flow are not constant
Ans.
B
Q.NO.61.
Viscosity
of liquid ……………. with the ……………...of the temperature
A.
Increase, increase
B.
Decrease, decrease
C.
Decrease, increase
D.
Increase, decrease
Ans.
C
