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
Correct Answer :
C. Steady flow
Related Questions
All the terms of energy in Bernoulli's equation have dimension of
Energy
Work
Mass
Length
The property by virtue of which a liquid opposes relative motion between its different layers is called
Surface tension
Coefficient of viscosity
Viscosity
Osmosis
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be
500 kg
1000 kg
1500 kg
2000 kg
General energy equation holds for
Steady flow
Turbulent flow
Laminar flow
Non-uniform flow
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcys coefficient of friction for pipe, and l = Length of pipe)
d = (D⁵/8fl)1/2
d = (D⁵/8fl)1/3
d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/5
Flow occurring in a pipeline when a valve is being opened is
Steady
Unsteady
Laminar
Vortex
An ideal flow of any fluid must fulfil the following
Newton's law of motion
Newton's law of viscosity
Pascal' law
Continuity equation
The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)
w
wh
w/h
h/w
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
Higher than the surface of liquid
The same as the surface of liquid
Lower than the surface of liquid
Unpredictable
In a venturi-flume, the flow takes place at
Atmospheric pressure
Gauge pressure
Absolute pressure
None of these
The mass per unit volume of a liquid at a standard temperature and pressure is called
Specific weight
Mass density
Specific gravity
None of these
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 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
When the Mach number is more than 6, the flow is called
Sub-sonic flow
Sonic flow
Super-sonic flow
Hyper-sonic flow
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
Equal to
Directly proportional
Inversely proportional
None of these
A balloon lifting in air follows the following principle
Law of gravitation
Archimedes principle
Principle of buoyancy
All of the above
An average value of coefficient of velocity is
0.62
0.76
0.84
0.97
The volumetric change of the fluid caused by a resistance is known as
Volumetric strain
Volumetric index
Compressibility
Adhesion
The stress-strain relation of the Newtonian fluid is
Linear
Parabolic
Hyperbolic
Inverse type
The pressure of a liquid measured with the help of a Piezometer tube is
Vacuum pressure
Gauge pressure
Absolute pressure
Atmospheric pressure
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called
Adhesion
Cohesion
Viscosity
Compressibility
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water?
10 m/sec
25 m/sec
2 m/sec
50 m/sec
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
The discharge over a rectangular notch is
Inversely proportional to H3/2
Directly proportional to H3/2
Inversely proportional to H5/2
Directly proportional to H5/2
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are
Less
More
Equal
Less at low temperature and more at high temperature
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
The ratio of the inertia force to the elastic force is called
Reynold's number
Froude's number
Weber's number
Mach number
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
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.
Equal to
Less than
More than
None of these
The total energy of a liquid particle in motion is equal to
Pressure energy + kinetic energy + potential energy
Pressure energy - (kinetic energy + potential energy)
Potential energy - (pressure energy + kinetic energy
Kinetic energy - (pressure energy + potential energy)