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
Correct Answer :
B. Uniform flow
Related Questions
Capillary action is due to the
Surface tension
Cohesion of the liquid
Adhesion of the liquid molecules and the molecules on the surface of a solid
All of the above
The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream
Keeps on increasing
Keeps on decreasing
Remain constant
May increase/decrease
An ideal flow of any fluid must satisfy
Pascal law
Newton's law of viscosity
Boundary layer theory
Continuity equation
Which of the following is the unit of kinematic viscosity?
Pascal
Poise
Stoke
Faraday
Coefficient of contraction is the ratio of
Actual velocity of jet at vena contracta to the theoretical velocity
Loss of head in the orifice to the head of water available at the exit of the orifice
Loss of head in the orifice to the head of water available at the exit of the orifice
Area of jet at vena-contracta to the area of orifice
A weir, generally, used as a spillway of a dam is
Narrow crested weir
Broad crested weir
Ogee weir
Submerged weir
The line of action of the buoyant force acts through the Centroid of the
Submerged body
Volume of the floating body
Volume of the fluid vertically above the body
Displaced volume of the fluid
An air vessel is provided at the summit in a siphon to
Avoid interruption in the flow
Increase discharge
Increase velocity
Maintain pressure difference
The coefficient of viscosity may be determined by
Capillary tube method
Orifice type viscometer
Rotating cylinder method
All of these
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
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)
(8/15) Cd. 2g. H
(8/15) Cd. 2g. H3/2
(8/15) Cd. 2g. H²
(8/15) Cd. 2g. H5/2
The body will float if the force of buoyancy is __________ the weight of the liquid displaced.
Equal to
Less than
More than
None of these
The maximum efficiency of transmission through a pipe is
50 %
56.7 %
66.67 %
76.66 %
Surface energy per unit area of a surface is numerically equal to
Atmospheric pressure
Surface tension
Force of adhesion
Force of cohesion
The specific weight of water in S.I. units is taken as
9.81 kN/m3
9.81 × 103 N/m3
9.81 × 10-6 N/mm3
Any one of these
A structure, whose width is __________ the width of the channel, is called a flumed structure.
Less than
More than
Equal
None of these
If no resistance is encountered by displacement, such a substance is known as
Fluid
Water
Gas
Ideal fluid
The property by virtue of which a liquid opposes relative motion between its different layers is called
Surface tension
Coefficient of viscosity
Viscosity
Osmosis
A manometer is used to measure
Low pressure
Moderate pressure
High pressure
Atmospheric pressure
The normal stress is same in all directions at a point in a fluid
Only when the fluid is frictionless
Only when the fluid is incompressible and has zero viscosity
When there is no motion of one fluid layer relative to an adjacent layer
Irrespective of the motion of one fluid layer relative to an adjacent layer
For measuring flow by a Venturimeter, if should be installed in
Vertical line
Horizontal line
Inclined line with flow downward
In any direction and in any location
When a body is placed over a liquid, it will sink down if
Gravitational force is equal to the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid
Gravitational force is more than the up-thrust of the liquid
None of the above
The coefficient of discharge for an external mouthpiece depends upon
Velocity of liquid
Pressure of liquid
Area of mouthpiece
Length of mouthpiece
The point at which the resultant pressure on an immersed surface acts, is known as
Centre of gravity
Centre of depth
Centre of pressure
Centre of immersed surface
The value of mass density in kg-sec-V-m⁴ for water at 0°C is
1
1000
100
101.9
Reynolds number is significant in
Supersonics, as with projectile and jet propulsion
Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls
All of the above
The pressure less than atmospheric pressure is known as
Suction pressure
Vacuum pressure
Negative gauge pressure
All of these
A flow is called hyper-sonic, if the Mach number is
Less than unity
Unity
Between 1 and 6
None of these
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called
Surface tension
Compressibility
Capillarity
Viscosity
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
Cc × Cv
Cc × Cr
Cv × Cr
Cc/Cr