Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation ?
1. Fluid flow is frictionless & irrotational.
2. Fluid flow is steady.
3. Fluid flow is uniform & turbulent.
4. Fluid is compressible.
5. Fluid is incompressible.
Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation ?
1. Fluid flow is frictionless & irrotational.
2. Fluid flow is steady.
3. Fluid flow is uniform & turbulent.
4. Fluid is compressible.
5. Fluid is incompressible.
Power loss in an orificemeter is __________ that in a venturimeter.
Power loss in an orificemeter is __________ that in a venturimeter.
The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.
The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.
The equivalent diameter for fluid flow through square cross section channel of side 'x', for pressure drop calculation purpose is given by
The equivalent diameter for fluid flow through square cross section channel of side 'x', for pressure drop calculation purpose is given by
A streamline is
A streamline is
Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.
Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.
Slugging occurs in a fluidised bed, if the bed is
Slugging occurs in a fluidised bed, if the bed is
Which of the following is most prone to pulsating discharge flow ?
Which of the following is most prone to pulsating discharge flow ?
The component of acceleration resulting due to unsteady nature of flow is called __________ acceleration.
The component of acceleration resulting due to unsteady nature of flow is called __________ acceleration.
A fluid is the one, which
A fluid is the one, which
The pipe wall thickness is minimum for a pipe of given nominal size having schedule number
The pipe wall thickness is minimum for a pipe of given nominal size having schedule number
A mixed flow centrifugal pump
A mixed flow centrifugal pump
Navier-Stokes equation is useful in the analysis of __________ fluid flow problems.
Navier-Stokes equation is useful in the analysis of __________ fluid flow problems.
The most serious disadvantage of an orificemeter is that
The most serious disadvantage of an orificemeter is that
For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.
For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.
The exit cone angle in case of a standard venturimeter is __________ the entrance cone angle.
The exit cone angle in case of a standard venturimeter is __________ the entrance cone angle.
Viscosity of a liquid decreases __________ with rise in temperature.
Viscosity of a liquid decreases __________ with rise in temperature.
Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.
Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.
Mach number is the ratio of the speed of the
Mach number is the ratio of the speed of the
Pascal's law is valid, only when the fluid is
Pascal's law is valid, only when the fluid is
Sewage sludge is __________ type of non-Newtonion fluid.
Sewage sludge is __________ type of non-Newtonion fluid.
The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _________ the mean velocity of flow.
The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _________ the mean velocity of flow.
Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.
Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.
For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is
For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is
The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is
The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is
Friction factor for a hydraulically smooth pipe at NRe = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will
Friction factor for a hydraulically smooth pipe at NRe = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will
When the momentum of one fluid is used for moving another fluid, such a device is called a/an
When the momentum of one fluid is used for moving another fluid, such a device is called a/an
Most commonly used joint in the underground pipe lines is the
Most commonly used joint in the underground pipe lines is the
Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate.
Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate.
A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is(where, y = specific weight of water)
A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is(where, y = specific weight of water)
When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the __________ bed.
When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the __________ bed.
A tube is specified by its
A tube is specified by its
A relief valve
A relief valve
The ratio of wall drag to total drag in the Stoke's law range is
The ratio of wall drag to total drag in the Stoke's law range is
__________ pumps are axial flow pumps.
__________ pumps are axial flow pumps.
The specific speed of a pump is defined as the speed of a unit of such a size, that it
The specific speed of a pump is defined as the speed of a unit of such a size, that it
The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and
The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and
At a constant speed of the centrifugal pump . it __________ the impeller diameter.
At a constant speed of the centrifugal pump . it __________ the impeller diameter.
A Newtonion fluid is that
A Newtonion fluid is that
The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.
The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.
f = 16/NRe, is valid for
f = 16/NRe, is valid for
A piezometer provided in the pipe measures
A piezometer provided in the pipe measures
A venturimeter measures the
A venturimeter measures the
Two liquids manometer is used for measuring small pressure differences in
Two liquids manometer is used for measuring small pressure differences in
A fluid is a substance, that
A fluid is a substance, that
If in a flow field, between any two points, then the flow must be
If in a flow field, between any two points, then the flow must be
For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe , plot is
For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe , plot is
In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.
In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity.
Propeller type centrifugal pumps are most suitable for
Propeller type centrifugal pumps are most suitable for
Dimension of surface tension is(where, F = force, L = length)
Dimension of surface tension is(where, F = force, L = length)
With increase in temperature, the vapor pressure of liquids
With increase in temperature, the vapor pressure of liquids
Air vessel of a reciprocating pump is initially filled with
Air vessel of a reciprocating pump is initially filled with
Co-efficient of velocity is __________ the coefficient of discharge.
Co-efficient of velocity is __________ the coefficient of discharge.
The fluid property which matters for fall-ing rain drops to acquire spherical shape is its
The fluid property which matters for fall-ing rain drops to acquire spherical shape is its
For a specific centrifugal air blower operating at constant speed & capacity, the power requirement and pressure vary
For a specific centrifugal air blower operating at constant speed & capacity, the power requirement and pressure vary
Drag co-efficient in hindered settling is __________ that in free settling.
Drag co-efficient in hindered settling is __________ that in free settling.
Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)
Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)
Which of the following factors does not contribute to the pressure drop in a pipeline ?
Which of the following factors does not contribute to the pressure drop in a pipeline ?
The curve of metacentre for a floating body __________ the curve of buoyancy.
The curve of metacentre for a floating body __________ the curve of buoyancy.
A bed consists of particles of density 2000 kg/m³. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is
A bed consists of particles of density 2000 kg/m³. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is
For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively).
For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively).
A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity
A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity
Potential function is applicable only for __________ flow.
Potential function is applicable only for __________ flow.
Two piping system are said to be equivalent, when the __________ are same.
Two piping system are said to be equivalent, when the __________ are same.
With increase in the schedule number of a pipe of a particular nominal size, the
With increase in the schedule number of a pipe of a particular nominal size, the
Kinetic energy of fluid per unit weight represented by the velocity head is given by
Kinetic energy of fluid per unit weight represented by the velocity head is given by
Cd for the orifice plate varies from
Cd for the orifice plate varies from
The valve commonly used in pipes larger than 2" dia is a
The valve commonly used in pipes larger than 2" dia is a
Fanning friction factor is equal to(where, fB = Blassius friction factor).
Fanning friction factor is equal to(where, fB = Blassius friction factor).
A centrifugal pump loses prime after starting. The reason of this trouble may be
A centrifugal pump loses prime after starting. The reason of this trouble may be
The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter.
The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter.
Which of the following valves will incur maximum pressure drop for the same discharge of water?
Which of the following valves will incur maximum pressure drop for the same discharge of water?
Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.
Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.
A floating/submerged body is always stable, if its centre of gravity
A floating/submerged body is always stable, if its centre of gravity
Fanning friction factor equation applies to the __________ fluid flow.
Fanning friction factor equation applies to the __________ fluid flow.
In fluid flow, cavitation is caused, if the
In fluid flow, cavitation is caused, if the
Which of the following quantities are computed by using the hydraulic radius for non-circular ducts?
Which of the following quantities are computed by using the hydraulic radius for non-circular ducts?
The terminal velocity of a particle moving through a fluid varies as dpn. The value of n is equal to __________ in Stoke's law regime.
The terminal velocity of a particle moving through a fluid varies as dpn. The value of n is equal to __________ in Stoke's law regime.
If more than two branches of pipes are to be connected at the same point, then use a/an
If more than two branches of pipes are to be connected at the same point, then use a/an
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have
The schedule number of a pipe is an indication of its
The schedule number of a pipe is an indication of its
The range of a particular rotameter can be increased by
The range of a particular rotameter can be increased by
Which of the following two quantities when same, makes one pipe system equivalent to another pipe system?
Which of the following two quantities when same, makes one pipe system equivalent to another pipe system?
For a reciprocating pump, the indicator diagram is the graph between the
For a reciprocating pump, the indicator diagram is the graph between the
Centre of pressure in an immersed body is __________ the centre of gravity.
Centre of pressure in an immersed body is __________ the centre of gravity.
Which of the following has the minimum compressibility?
Which of the following has the minimum compressibility?
I.D. of 1/4" schedule 40 pipe is 0.364". I.D. of a 1/2" schedule 40 pipe would be __________ inch
I.D. of 1/4" schedule 40 pipe is 0.364". I.D. of a 1/2" schedule 40 pipe would be __________ inch
In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas)
In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas)
Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump.
Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump.
Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum
Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum
Which of the following may be termed as a variable orifice flowmeter?
Which of the following may be termed as a variable orifice flowmeter?
In isotropic turbulence, the __________ are equal to each other.
In isotropic turbulence, the __________ are equal to each other.
Vena-contracta pressure tapping is at a distance __________ from the position of an orificemeter fitted in a pipe of internal diameter 'd'
Vena-contracta pressure tapping is at a distance __________ from the position of an orificemeter fitted in a pipe of internal diameter 'd'
In fluid flow, the stagnation point is defined as a point, where the __________ is zero.
In fluid flow, the stagnation point is defined as a point, where the __________ is zero.
A perfect gas
A perfect gas
Pick out the wrong statement about a streamline.
Pick out the wrong statement about a streamline.
A pitched-blade turbine draws __________ a straight blade turbine.
A pitched-blade turbine draws __________ a straight blade turbine.
Which law is followed by the velocity distribution in the turbulent boundary layer?
Which law is followed by the velocity distribution in the turbulent boundary layer?
For the production of very high vacuum, a __________ pump is normally used.
For the production of very high vacuum, a __________ pump is normally used.
