A flow through a long pipe at constant rate is called
Steady uniform flow
Steady non-uniform flow
Unsteady uniform flow
Unsteady non-uniform flow
Correct Answer :
A. Steady uniform flow
Related Questions
The flow in which conditions do not change with time at any point, is known as
One dimensional flow
Uniform flow
Steady flow
Turbulent flow
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is
3.53 kN
33.3 kN
35.3 kN
None of these
Pitot tube is used for measurement of
Pressure
Flow
Velocity
Discharge
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm, the pressure at a depth of 50 m below the oil surface will be
2 meters of water column
3 meters of water column
5 meters of water column
6 meters of water Column
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to
10 kg
100 kg
1000 kg
1 kg
The hydraulic mean depth or the hydraulic radius is the ratio of
Area of flow and wetted perimeter
Wetted perimeter and diameter of pipe
Velocity of flow and area of flow
None of these
The height of a water column equivalent to a pressure of 0.15 MPa is
15.3 m
25.3 m
35.3 m
45.3 m
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)
0.855 a.√(2gH)
1.855 aH.√(2g)
1.585 a.√(2gH)
5.85 aH.√(2g)
For a floating body to be in stable equilibrium, its metacentre should be
Below the center of gravity
Below the center of buoyancy
Above the center of buoyancy
Above the center of gravity
When a body floating in a liquid, is displaced slightly, it oscillates about
C.G. of body
Center of pressure
Center of buoyancy
Metacentre
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)
(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H
(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2g) × H2
The dynamic viscosity of the liquid __________ with rise in temperature.
Remain unaffected
Increases
Decreases
None of these
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.
H/3
H/2
2H/3
3H/4
The most efficient section of a channel is
Triangular
Rectangular
Square
Trapezoidal
Select the correct statement
Local atmospheric pressure depends upon elevation of locality only
Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
Local atmospheric pressure is always below standard atmospheric pressure
A barometer reads the difference between local and standard atmospheric pressure
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the Centroid, if
The area is horizontal
The area is vertical
The area is inclined
All of the above
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than
Frictional force
Viscosity
Surface friction
All of the above
A pitot tube is used to measure the
Velocity of flow at the required point in a pipe
Pressure difference between two points in a pipe
Total pressure of liquid flowing in a pipe
Discharge through a pipe
The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.
Same as
Less than
More than
None of these
A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
2.89 kN
8.29 kN
9.28 kN
28.9 kN
The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.
Plus
Minus
Divide
None of these
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as
One dimensional flow
Uniform flow
Steady flow
Turbulent flow
Principle of similitude forms the basis of
Comparing two identical equipments
Designing models so that the result can be converted to prototypes
Comparing similarity between design and actual equipment
Hydraulic designs
The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)
μπ²NR/60t
μπ²NR²/60t
μπ²NR³/60t
μπ²NR⁴/60t
The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called
Newton's law of motion
Newton's law of cooling
Newton's law of viscosity
Newton's law of resistance
The continuity equation is connected with
Open channel/pipe flow
Compressibility of fluids
Conservation of mass
Steady/unsteady flow
The Bernoulli's equation is based on the assumption that
There is no loss of energy of the liquid flowing
The velocity of flow is uniform across any cross-section of the pipe
No force except gravity acts on the fluid
All of the above
Buoyant force is
Resultant force acting on a floating body
Equal to the volume of liquid displaced
Force necessary to keep a body in equilibrium
The resultant force on a body due to the fluid surrounding it
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of
1
1.2
0.8
0.75
A flow is called super-sonic if the
Velocity of flow is very high
Discharge is difficult to measure
Mach number is between 1 and 6
None of these