Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will
Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will
Net positive suction head (NPSH) of a centrifugal pump must be
Net positive suction head (NPSH) of a centrifugal pump must be
Which of the following produces maximum pressure difference for transportation of gases?
Which of the following produces maximum pressure difference for transportation of gases?
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'
Foot valves are provided in the suction line of a centrifugal pump to
Foot valves are provided in the suction line of a centrifugal pump to
In magnetic flow meters, voltage generation is
In magnetic flow meters, voltage generation is
A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.
A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.
Priming of a centrifugal pump is done to
Priming of a centrifugal pump is done to
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 ?
Lower BWG means __________ of the tube.
Lower BWG means __________ of the tube.
Drag force acting on a body does not depend upon the
Drag force acting on a body does not depend upon the
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
For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).
For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³/s? The Fanning friction factor, f is 0.0062.
A centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit (E) to deliver water at a flow rate of 0.001 m³/s? The Fanning friction factor, f is 0.0062.
Boiler feed water pump is usually a __________ pump.
Boiler feed water pump is usually a __________ pump.
The speed of sound in an ideal gas varies as the
The speed of sound in an ideal gas varies as the
Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m³, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is
Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m³, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is
Shear stress in a fluid flowing in a round pipe
Shear stress in a fluid flowing in a round pipe
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the
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 equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)
The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)
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
Co-efficient of velocity is __________ the coefficient of discharge.
Co-efficient of velocity is __________ the coefficient of discharge.
Function of air vessel provided in a reciprocating pump is to
Function of air vessel provided in a reciprocating pump is to
What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.
What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.
In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?
In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?
With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)
With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)
For an unstable equilibrium of a floating body (where, M = metacentre.)
For an unstable equilibrium of a floating body (where, M = metacentre.)
The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length.
The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length.
Rise of liquid in a capillary tube is due to
Rise of liquid in a capillary tube is due to
Very small pressure difference (< 5 mm water coloumn) can be most conveniently measured by a/an __________ manometer.
Very small pressure difference (< 5 mm water coloumn) can be most conveniently measured by a/an __________ manometer.
The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation
The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation
Curve III in the above diagram represents a/an
Curve III in the above diagram represents a/an
The __________ pressure is measured by a static tube.
The __________ pressure is measured by a static tube.
A venturimeter can not be used for the direct measurement of
A venturimeter can not be used for the direct measurement of
The ratio of inertial forces to elastic forces is called the __________ number.
The ratio of inertial forces to elastic forces is called the __________ number.
Maintenance cost of a __________ pump for a particular duty is the least.
Maintenance cost of a __________ pump for a particular duty is the least.
Reciprocating pumps compared to centrifugal pumps
Reciprocating pumps compared to centrifugal pumps
Cavitation in a centrifugal pump results from
Cavitation in a centrifugal pump results from
The Mach number for hypersonic flow of compressible fluid is
The Mach number for hypersonic flow of compressible fluid is
Purpose of relief valve in a reciprocating pump is to
Purpose of relief valve in a reciprocating pump is to
Pick out the wrong statement about a streamline.
Pick out the wrong statement about a streamline.
The valve commonly used in pipes larger than 2" dia is a
The valve commonly used in pipes larger than 2" dia is a
The capacity of an accumulator is the maximum
The capacity of an accumulator is the maximum
Two liquids manometer is used for measuring small pressure differences in
Two liquids manometer is used for measuring small pressure differences in
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.
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).
Which of the following has the minimum compressibility?
Which of the following has the minimum compressibility?
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.
What is the value of Fanning friction factor f ' for smooth pipe at NRe = 10⁶ approximately?
What is the value of Fanning friction factor f ' for smooth pipe at NRe = 10⁶ approximately?
Which of the following is the most common pump for pumping either raw sewage or sludge?
Which of the following is the most common pump for pumping either raw sewage or sludge?
Cd for the orifice plate varies from
Cd for the orifice plate varies from
Which of the following must be followed by the flow of a fluid (real or ideal)?
(I) Newton's law of viscosity.
(II) Newton's second law of motion.
(III) The continuity equation.
(IV) Velocity of boundary layer must be zero relative to boundary.
(V) Fluid cannot penetrate a boundary.
Which of the following must be followed by the flow of a fluid (real or ideal)?
(I) Newton's law of viscosity.
(II) Newton's second law of motion.
(III) The continuity equation.
(IV) Velocity of boundary layer must be zero relative to boundary.
(V) Fluid cannot penetrate a boundary.
For pipes that must be broken at intervals for maintenance, the connector used should be a/an
For pipes that must be broken at intervals for maintenance, the connector used should be a/an
The distance between metacentre and __________ is called metacentric height.
The distance between metacentre and __________ is called metacentric height.
For an incompressible fluid, the bulk modulus of elasticity is
For an incompressible fluid, the bulk modulus of elasticity is
Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)
Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)
Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.
Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.
The range of a particular rotameter can be increased by
The range of a particular rotameter can be increased by
The nominal size of a hose pipe is specified by its
The nominal size of a hose pipe is specified by its
The ratio of pressure forces to inertial forces is called the __________ number.
The ratio of pressure forces to inertial forces is called the __________ number.
The resistance wire used in a hot wire anemometer for conducting electrical current is made of
The resistance wire used in a hot wire anemometer for conducting electrical current is made of
A piezometer provided in the pipe measures
A piezometer provided in the pipe measures
Which of the following is used for very accurate measurement of flow of gas at low velocity?
Which of the following is used for very accurate measurement of flow of gas at low velocity?
Pressure drag does not depend upon the
Pressure drag does not depend upon the
The terminal velocity of a small sphere settling in a viscous fluid varies as the
The terminal velocity of a small sphere settling in a viscous fluid varies as the
Velocity at a certain point in case of streamline flow is
Velocity at a certain point in case of streamline flow 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
Air vessel of a reciprocating pump is initially filled with
Air vessel of a reciprocating pump is initially filled with
Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.
Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.
Cavitation in a centrifugal pump can be avoided by keeping the
Cavitation in a centrifugal pump can be avoided by keeping the
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.
__________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm².
__________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm².
The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the
Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the
Ratio of inertial forces to surface tension forces is called the __________ number.
Ratio of inertial forces to surface tension forces is called the __________ number.
Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter.
Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter.
A pressure head of 320 metres of water in meters of CCl₄ (sp.gr = 1.6) will be
A pressure head of 320 metres of water in meters of CCl₄ (sp.gr = 1.6) will be
If the head over the triangular notch is doubled, the discharge will increase by __________ times.
If the head over the triangular notch is doubled, the discharge will increase by __________ times.
With increase in molecular weight of the gas, the head developed by a centrifugal compressor will
With increase in molecular weight of the gas, the head developed by a centrifugal compressor will
The co-efficient of discharge of an orificemeter is a function of
The co-efficient of discharge of an orificemeter is a function of
For laminar flow through a closed conduit
For laminar flow through a closed conduit
N²Re/NFr is called the __________ number.
N²Re/NFr is called the __________ number.
A fluidis (μ/ρ = 0.01 cm²/sec) moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.
A fluidis (μ/ρ = 0.01 cm²/sec) moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.
Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.
Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.
Interstage coolers are provided in a multistage compressor to
Interstage coolers are provided in a multistage compressor to
A hydraulic ram acts as a/an __________ pump.
A hydraulic ram acts as a/an __________ pump.
A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :
Δ P/L = 375 x 10³ VOM + 10.94 x 10⁶ V²OM (SI units)
If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is
A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :
Δ P/L = 375 x 10³ VOM + 10.94 x 10⁶ V²OM (SI units)
If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is
While starting an axial flow pump, its delivery valve should be kept
While starting an axial flow pump, its delivery valve should be kept
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
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
While starting a centrifugal pump, its delivery valve should be kept
While starting a centrifugal pump, its delivery valve should be kept
The normal stress is the same in all directions at a point in a fluid, when the fluid is
The normal stress is the same in all directions at a point in a fluid, when the fluid is
In a fully turbulent flow (Re > 105) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is
In a fully turbulent flow (Re > 105) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is
Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an
Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an
The ratio of inertial forces to viscous forces is called the __________ number.
The ratio of inertial forces to viscous forces is called the __________ number.
Pressure drop (Δp) for a fluid flowing in turbulent flow through a pipe is a function of velocity (V) as
Pressure drop (Δp) for a fluid flowing in turbulent flow through a pipe is a function of velocity (V) as
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 ratio of inertial forces to gravity forces is called the __________ number.
The ratio of inertial forces to gravity forces is called the __________ number.
Which of the following pipe bends will incur the largest head loss ?
Which of the following pipe bends will incur the largest head loss ?
