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
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
A piezometer provided in the pipe measures
A piezometer provided in the pipe measures
Two piping system are said to be equivalent, when the __________ are same.
Two piping system are said to be equivalent, when the __________ are same.
A mixed flow centrifugal pump
A mixed flow centrifugal pump
Pick out the wrong statement about a streamline.
Pick out the wrong statement about a streamline.
For the production of very high vacuum, a __________ pump is normally used.
For the production of very high vacuum, a __________ pump is normally used.
Cd for the orifice plate varies from
Cd for the orifice plate varies from
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.
A perfect gas
A perfect gas
A floating/submerged body is always stable, if its centre of gravity
A floating/submerged body is always stable, if its centre of gravity
The most serious disadvantage of an orificemeter is that
The most serious disadvantage of an orificemeter is that
Dimension of surface tension is(where, F = force, L = length)
Dimension of surface tension is(where, F = force, L = length)
A fluid is the one, which
A fluid is the one, which
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
Viscosity of a liquid decreases __________ with rise in temperature.
Viscosity of a liquid decreases __________ with rise in temperature.
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.
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 valve commonly used in pipes larger than 2" dia is a
The valve commonly used in pipes larger than 2" dia is a
Which of the following has the minimum compressibility?
Which of the following has the minimum compressibility?
Fanning friction factor equation applies to the __________ fluid flow.
Fanning friction factor equation applies to the __________ fluid 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.
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
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.
Power loss in an orificemeter is __________ that in a venturimeter.
Power loss in an orificemeter is __________ that in a venturimeter.
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.
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
Propeller type centrifugal pumps are most suitable for
Propeller type centrifugal pumps are most suitable for
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.
Fanning friction factor is equal to(where, fB = Blassius friction factor).
Fanning friction factor is equal to(where, fB = Blassius friction factor).
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
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.
In fluid flow, cavitation is caused, if the
In fluid flow, cavitation is caused, if the
A pitched-blade turbine draws __________ a straight blade turbine.
A pitched-blade turbine draws __________ a straight blade turbine.
Slugging occurs in a fluidised bed, if the bed is
Slugging occurs in a fluidised bed, if the bed is
A tube is specified by its
A tube is specified by its
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?
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
The schedule number of a pipe is an indication of its
The schedule number of a pipe is an indication of its
Mach number is the ratio of the speed of the
Mach number is the ratio of the speed of the
For a reciprocating pump, the indicator diagram is the graph between the
For a reciprocating pump, the indicator diagram is the graph between the
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
Pascal's law is valid, only when the fluid is
Pascal's law is valid, only when the fluid 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
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
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)
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.
At a constant speed of the centrifugal pump . it __________ the impeller diameter.
At a constant speed of the centrifugal pump . it __________ the impeller diameter.
With increase in temperature, the vapor pressure of liquids
With increase in temperature, the vapor pressure of liquids
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)
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
Which of the following is most prone to pulsating discharge flow ?
Which of the following is most prone to pulsating discharge flow ?
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'
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.
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.
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.
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 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
Centre of pressure in an immersed body is __________ the centre of gravity.
Centre of pressure in an immersed body is __________ the centre of gravity.
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.
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
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
Co-efficient of velocity is __________ the coefficient of discharge.
Co-efficient of velocity is __________ the coefficient of discharge.
__________ pumps are axial flow pumps.
__________ pumps are axial flow pumps.
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?
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?
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 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
f = 16/NRe, is valid for
f = 16/NRe, is valid for
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
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.
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?
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
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 ?
A venturimeter measures the
A venturimeter measures the
Drag co-efficient in hindered settling is __________ that in free settling.
Drag co-efficient in hindered settling is __________ that in free settling.
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
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
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.
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
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.
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)
A fluid is a substance, that
A fluid is a substance, that
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 relief valve
A relief valve
The range of a particular rotameter can be increased by
The range of a particular rotameter can be increased by
Most commonly used joint in the underground pipe lines is the
Most commonly used joint in the underground pipe lines is the
Potential function is applicable only for __________ flow.
Potential function is applicable only for __________ flow.
In isotropic turbulence, the __________ are equal to each other.
In isotropic turbulence, the __________ are equal to each other.
Sewage sludge is __________ type of non-Newtonion fluid.
Sewage sludge is __________ type of non-Newtonion fluid.
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
A Newtonion fluid is that
A Newtonion fluid is that
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.
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
Two liquids manometer is used for measuring small pressure differences in
Two liquids manometer is used for measuring small pressure differences in
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
Which of the following may be termed as a variable orifice flowmeter?
Which of the following may be termed as a variable orifice flowmeter?
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).
Air vessel of a reciprocating pump is initially filled with
Air vessel of a reciprocating pump is initially filled with
A streamline is
A streamline is
