Pressure gradient in the pipe flow is influenced by the
A. Diameter of pipe
B. Velocity of the fluid
C. Density & viscosity of the fluid
D. All of the above
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In case of supersonic flow of a fluid through pipeline, the 'Mach number' is
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Plunger pumps are used for
A. Higher pressure
B. Slurries
C. Viscous mass
D. None of these
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Bernoull's equation does not apply to the functioning of a/an
A. Venturimeter
B. Orificem
C. Pitot tube
D. None of these
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Potential flow is the flow of
A. Compressible fluids with shear
B. Compressible fluids with no shear
C. Incompressible fluids with shear
D. Incompressible fluids with no shear
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Power number is the ratio of
A. Drag stress to inertial stress
B. Inertial stress to drag stress
C. Inertial stress to gravitational stress
D. Gravitational stress to drag stress
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Prandtl mixing length is
A. Applicable to laminar flow problems
B. A universal constant
C. Zero at the pipe wall
D. None of these
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Unsteady uniform flow is represented by flow through a/an
A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at increasing rate
D. Expanding tube at constant rate
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Unsteady non-uniform flow is represented by flow through a/an
A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at increasing rate
D. Expanding tube at constant rate
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Steady uniform flow is represented by flow through a/an
A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at constant rate
D. None of these
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The co-efficient of drag and lift for an incompressible fluid depends on the
A. Reynolds number
B. Froude number
C. Mach number
D. All of the above
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__________ flow means the flow of incompressible fluid with no shear.
A. Potential
B. Streamline
C. Creep
D. Boundary layer
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For the same flow rate of a fluid, the pressure drop is the least for
A. Venturimeter
B. Orificemeter
C. Flow-nozzle
D. Δp is same for all
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Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the
A. Wall roughness
B. Reynolds number
C. Both A and B
D. Neither A nor B
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Propellers are
A. Axial flow mixers
B. Low speed impeller
C. Used for mixingliquids of high viscosity
D. Radial flow mixers
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Horsepower requirement for given pump capacity depends upon the
A. Specific gravity of the liquid
B. Suction lift
C. Discharge head
D. All of the above
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Working of a __________ pump characterises mixed flow.
A. Turbine
B. Piston
C. Diaphragm
D. None of these
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Which is the correct relationship for a centrifugal pump? (where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm)
A. D = 1840 H0.5 /N
B. D = 1840 N/H0.5
C. H = 1840 D0.5 /N
D. D = 1840 H/N
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Purpose of air lift pump is to
A. Compress air
B. Lift compressed air
C. Lift water from a well by using compressed air
D. Lift air under negative pressure
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A pump operating under specific conditions delivers insufficient quantity of liquid. This may be set right by
A. Decreasing the size of the inlet pipe
B. Increasing the size of the inlet pipe
C. Lowering the pump position
D. Both B and C
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