# exam2-1 - difference between the centers at the elbow...

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NAME:_______________________________________ UFID:________-________ INSTRUCTIONS: Closed book, closed notes, calculator allowed Clearly state any assumptions and show derivations 1. (10 points) Air fows through a pipe at a rate o± 0.2 m 3 /s. The pipe consists o± two sections with diameters 20 cm and 10 cm with a smooth connecting section. The pressure di±±erence between the two pipe sections is measured with a water manometer. Determine the di±±erential height h water in the manometer assuming that ±rictional e±±ects are negligible. Assume that the air has a density o± 1.2 kg/m 3 . Continue with your answer on the back o± this page i± necessary. EGN3353C Fluid Mechanics Fall 2008 Exam 2 1 o± 3

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2. (10 points) A 90-degree elbow directs water at a rate of 25 kg/s from the horizontal into a vertical direction. The diameter of the entire elbow is 10 cm. The elbow discharges water into the atmosphere and therefore the pressure at the exit is atmospheric. The elevation
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Unformatted text preview: difference between the centers at the elbow outlet and inlet sections is 35 cm. Assuming that the weight of the elbow and the water in it as well as frictional effects are negligible, determine (a) the gage pressure at the center of the inlet section and (b) the anchoring force needed to hold the elbow in place. Continue with your answer on the back of this page if necessary. EGN3353C Fluid Mechanics Fall 2008 Exam 2 2 of 3 3. (10 points) Water is fowing into and out oF a U-section pipe. At fange , the total absolute pressure is 200 kPa, and 30 kg/s fows into the pipe. At fange , the total absolute pressure is 150 kPa. At fange , 8 kg/s discharges into the atmosphere, which is at 100 kPa. Determine the total Forces at the two fanges in the x and z directions. The weight oF the U-section and the water in it may be neglected. Continue with your answer on the back oF this page iF necessary. EGN3353C luid Mechanics all 2008 Exam 2 3 oF 3...
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## exam2-1 - difference between the centers at the elbow...

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