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Chemical Engineering - Fluid Mechanics

Exercise : Fluid Mechanics - Section 8
16.
Purpose of relief valve in a reciprocating pump is to
protect the pump against developing excessive pressure.
facilitate unidirectional flow of liquid.
reduce the discharge pressure.
control the rate of discharge.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Select the correct statement.
The discharge through a venturimeter depends upon Δp only and is independent of orientation of the meter.
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.
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.
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.
Answer: Option
Explanation:
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18.
The Kozney-Carman equation, rewritten in terms of non-dimensional numbers gives (ΔP/pu2 ) proportional to
Answer: Option
Explanation:
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19.
In case of turbulent flow of fluid through a circular pipe, the
mean flow velocity is about 0.5 times the maximum velocity.
velocity profile becomes flatter and flatter with increasing Reynolds number.
point of maximum instability exists at a distance of 2r/3 from the pipe wall (r = pipe radius).
skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more.
Answer: Option
Explanation:
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20.
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
more
less
equal
either (a) or (b); depends on the viscosity of the fluid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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