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Unformatted text preview: ChBE 3200 A ' Dr. Meredith
Spring 2008 Exam 1 SoLM'TF’J—TO/K/ Name: (1) The device pictured below is used to measure the ﬂow rate of ﬂuid in the pipe.
Fluid, with a density of 900 kgi’m3, exits the pipe at atmospheric pressure and strikes a
plate that is attached to a force sensor. The pipe diameter is 2 cm. What is the mass ﬂow
rate (kg/s) of the fluid when the force measured on the plate is 400 N? HINT: A suggested control volume is drawn with dashed lines. The force acting on the
ﬂuid, B,c = 400 N is opposite the force acting on the plate, Rx : 400 N. Liquid Plate (2) A pump is used to deliver wator (p = 1000 kglm3) from a reservoir to a tank, as
shown. What should be the power rating on the pump if it is necessary to ﬁll the voiume
of the tank in 2 hours? The top of the tank is vented to the atmosphere. /Pow‘ﬂ‘ t+L 4* Wm
\A'M uk 01.54—[2'4— IOmdiameter l on?» water line (3) Water at 140 °F flows through a cylindrical pipe section of length 2 ft and radius
of 1/2 inch. The pressure drop over this length is 0.1 psi and flow is laminar. The
viscosity of water at this temperature is 0.9"?r x 10'6 (lbf s){ ftz. What is the magnitude of
the total force (in lbf‘) acting on the pipe due to friction? (Hint: multiply shear stress at pipe wall by the wall surface area. You don’t have to
derive the velocity distribution w it is given on the formula sheet.) ...
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This note was uploaded on 05/10/2008 for the course CHBE 3200 taught by Professor Meredith during the Spring '08 term at Georgia Tech.
 Spring '08
 Meredith

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