If steady flow exists in a piping system with different diameter pipes, the volu
ID: 703924 • Letter: I
Question
If steady flow exists in a piping system with different diameter pipes, the volumetric flow rate and the fluid velocity will remain constant throughout the system Changes in fluid velocity within a piping system will not result in changes in The volumetric flow rate and the mass flow rate are equal if the fluid is If the velocity profile of a fluid emerging from a control surface varies with momentum considered incompressible. surface area, integration across the control surface will not yield the mass flow rate provided the density is known. If the velocity profile of a fluid emerging from a control surface varies with surface area, the control volume form of the momentum equation can be used. The control volume form of the first law of thermodynamics cannot be usecd when the volumetric flow rate is a function of time. The control volume form of the first law of thermodynamics can be used to calculate the horsepower requirements of a pump or compressor. The original assumptions used to develop the Bernoulli equation do not allow the horsepower requirements of a pump or compressor to be determined. If friction is present in a turbulent fluid flow application, the Bernoulli equation is appropriate for a complete analysis of the system. __ venturi meter fitted with piezometers (vented to the atmosphere) is good for measuring volumetric gas flow rates.Explanation / Answer
1) volumetric flow rate will remain constant but velocity will change as velocity= volumetric flow rate/ Area of flow.
2)False. Momentum will change with change in velocity.
3)False. When density is 1 we will have mass flow rate= volumetric flow rate.
4)False. becz ,Integration of velocity over surface area gives volumetric flow rate. Density * vloumetric flow rate=mass flow rate
5)False. Momentum equation can be used when velocity does not changes
6)True. Becz 1st law of thermodynaics is valid for steady state.
7)True
8)True. Because in original assumption work done was considered zero and heat loss also was considered zero. So modified theorem is used for determination.
9)False, Because it does not encorporate the friction loss along the pipe and bends and fittings.
10)False, to calculate the flow rate we require the pressure drop along the flow. So the 2nd vent should be provided in the pipe and not to atmosphere.
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