Chemical Engineering :: Fluid Mechanics
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In case of a __________ the energy of flow is considerably decreased downstream of the machine.
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With increase in the shear rate, the apparent viscosity of pseudoplastic fluids
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Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about
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Purpose of hydraulic accumulator is to
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Pick out the wrong statement.
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Purpose of relief valve in a reciprocating pump is to
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Select the correct statement.
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The Kozney-Carman equation, rewritten in terms of non-dimensional numbers gives (ΔP/pu2 ) proportional to
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In case of turbulent flow of fluid through a circular pipe, the
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For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is
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A.
Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive forces.
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B.
A hydrometer used for the determination of specific gravities of liquids works on the principle of buoyant forces.
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C.
In case of unsteady fluid flow, the velocity at any given point does not change with time.
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D.
Turbulent fluid flow is characterised by the rapid fluctuation of instantaneous pressure & velocity at a point.
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A.
The discharge through a venturimeter depends upon Δp only and is independent of orientation of the meter.
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B.
A venturimeter with a given gage difference discharges at a greater rate, when the flow is vertically downward through it, than when the flow is vertically upward.
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C.
For a given pressure difference, the discharge of gas is greater through a venturimeter, when compressibility is taken into account, than when it is neglected.
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D.
The overall pressure loss is the same in a given pipe line, whether a venturimeter or a nozzle with the same throat dia is used.
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A.
mean flow velocity is about 0.5 times the maximum velocity.
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B.
velocity profile becomes flatter and flatter with increasing Reynolds number.
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C.
point of maximum instability exists at a distance of 2r/3 from the pipe wall (r = pipe radius).
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D.
skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more.
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