The force present in a moving liquid is
Inertia force
Viscous force
Gravity force
All of these
Correct Answer :
D. All of these
Related Questions
The increase of temperature results in
Increase in viscosity of gas
Increase in viscosity of liquid
Decrease in viscosity of gas
Decrease in viscosity of liquid
The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.
Less than
More than
Equal to
None of these
All the terms of energy in Bernoulli's equation have dimension of
Energy
Work
Mass
Length
The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is
0.0116 stoke
0.116 stoke
0.0611 stoke
0.611 stoke
Gradually varied flow is
Steady uniform
Non-steady non-uniform
Non-steady uniform
Steady non-uniform
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
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the
Force of adhesion
Force of cohesion
Force of friction
Force of diffusion
Select the correct statement
Weber's number is the ratio of inertia force to elastic force.
Weber's number is the ratio of gravity force to surface tension force.
Weber's number is the ratio of viscous force to pressure force.
Weber's number is the ratio of inertia force to surface tension force.
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
Coincides with
Lies below
Lies above
None of these
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.
Steady
Streamline
Turbulent
Unsteady
When the Mach number is less than unity, the flow is called
Sub-sonic flow
Sonic flow
Super-sonic flow
Hyper-sonic flow
A thick liquid like syrup has a __________ viscosity than a light liquid like water.
Lesser
Greater
Same
None of these
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
The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of approach)
(2/3) Cd × L.√2g [H1 - Ha]
(2/3) Cd × L. √2g [H1 3/2 - Ha 3/2]
(2/3) Cd × L.√2g [H1 2 - Ha 2]
(2/3) Cd × L. √2g [H1 5/2 - Ha 5/2]
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is
400 kg/cm²
4000 kg/cm²
40 × 10⁵ kg/cm²
40 × 10⁶ kg/cm²
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 per unit length is (where w = Specific weight of liquid, and H = Height of liquid)
wH
wH/2
wH2/2
wH2/3
The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)
1/RN
4/RN
16/RN
64/RN
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
Pressure head
Velocity head
Pressure head + velocity head
Pressure head - velocity head
In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle θ. Sensitivity of inclined tube to sensitivity of Utube is equal to
Sinθ
1/Sinθ
Cosθ
1/Cosθ
A fluid in equilibrium can't sustain
Tensile stress
Compressive stress
Shear stress
Bending stress
A streamline is defined as the line
Parallel to central axis flow
Parallel to outer surface of pipe
Of equal velocity in a flow
Along which the pressure drop is uniform
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 two important forces for a floating body are
Buoyancy, gravity
Buoyancy, pressure
Buoyancy, inertial
Inertial, gravity
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
The flow in which each liquid particle has a definite path and their paths do not cross each other is called
One dimensional flow
Streamline flow
Steady flow
Turbulent flow
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?
The metal piece will simply float over the mercury
The metal piece will be immersed in mercury by half
Whole of the metal piece will be immersed with its top surface just at mercury level
Metal piece will sink to the bottom
The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as
One dimensional flow
Uniform flow
Steady flow
Turbulent flow
The pressure of fluid due to hammer blow is
Directly proportional to density of fluid
Inversely proportional to density of fluid
Directly proportional to (density)1/2 of fluid
Inversely proportional to (density)1/2 of fluid
The Francis formula for the discharge over Cipoletti weir is
1.84 LH1/2
1.84 LH
1.84 LH3/2
1.84 LH5/2
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