Which of the statements are true?Group of answer choicesFor flow in a pipe, the velocity is the same across the pipe cross section.Mass flow rate can be defined as the multiples of density, pipe average velocity, and cross section area normal to the velocity.A volume flow rate is defined as the volume of the fluid flowing through a cross section per unit time.A mass flow rate into control volume is proportional to the velocity component parallel to the cross sectional area.Mass flow rate is defined as the amount of mass flowing through a cross section per unit time.
Question
Which of the statements are true?Group of answer choicesFor flow in a pipe, the velocity is the same across the pipe cross section.Mass flow rate can be defined as the multiples of density, pipe average velocity, and cross section area normal to the velocity.A volume flow rate is defined as the volume of the fluid flowing through a cross section per unit time.A mass flow rate into control volume is proportional to the velocity component parallel to the cross sectional area.Mass flow rate is defined as the amount of mass flowing through a cross section per unit time.
Solution
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False - For flow in a pipe, the velocity is not the same across the pipe cross section. It is typically highest in the center and decreases towards the walls due to friction.
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True - Mass flow rate can indeed be defined as the product of density, average velocity, and cross-sectional area normal to the velocity.
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True - A volume flow rate is defined as the volume of the fluid flowing through a cross section per unit time.
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False - A mass flow rate into a control volume is proportional to the velocity component normal (perpendicular) to the cross-sectional area, not parallel.
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True - Mass flow rate is defined as the amount of mass flowing through a cross section per unit time.
Similar Questions
17. A big pipeline branches into 6 other small pipes (same diameters, same length and same geometric plane). Will the flow rates and velocity of the small pipes be the same? (1) A) Yes, according to the continuity equation the flow rate in each branch will be 1/6 of the total flow rate. B) Yes, according to the continuity equation the flow rate in each branch will be 6/1 of the total flow rate. C) No, according to the continuity equation, the flow rate in each branch will be 1/6 of the total flow rate. D) The information given is not enough to respond to the question.
A fluid (rho = 1200kg / (m ^ 3)) flows through a horizontal 3.0 mm diameter pipe. When the Reynolds number is 1500, the head loss over a 6 m length of pipe is 2 m of that particular fluid. Determine the mass flow rate in kg/hr of the fluid at this condition.
Oil, of density 889 kg/m3 and kinematic viscosity 5.68 x 10-5 m2/s, flows through a pipe 6 cm internal diameter at a mass flow rate of 83.2 kg/s.Determine the volumetric flow rate (m3/s).
To compute the volumetric flow rate of fluid passing through a tube with a cross-sectional area of 0.493 inches in diameter and having a flow velocity of 3.5 ft/sec, follow these steps:
Assertion: When a liquid flowing in a broader pipe enters into a narrow pipe, the flowspeed of liquid increases.Reason: According to equation of continuity product of cross section area of a pipeand flow speed of liquid must remain constant at all sections of the pipe.
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