1. For a flow over a flat plate where the Reynolds number at the end of...
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1. For a flow over a flat plate where the Reynolds number at the end of the plate is above 5 105, (a) The entire boundary layer on the plate is turbulent (b) The boundary layer on the plate is fully developed (c) The entire boundary layer on the plate is laminar (d) The boundary layer on the plate begins as laminar, then it transitions to turbulent 2. The following is true about the total drag force on an arbitrarily shaped object immersed in a fluid flow with Reynolds number equal to 10: (a) it is inversely proportional to velocity. (b) it is directly proportional to velocity squared, V. (c) it is directly proportional to the density of the object. (d) it is directly proportional to particle diameter. 3. What is the drag coefficient, CD, of a small, smooth, spherical particle of diameter d = 5 m settling in the ambient air with Reynolds number 0.1? (a) 240 (b) 340 (c) 380 (d) 400 4. If the specific weight of a liquid is 187 lbf/ft, what is the liquid's specific gravity? (a) 0.187 (b) 2.99 (c) 5.81 (d) 96.4 1. For a flow over a flat plate where the Reynolds number at the end of the plate is above 5 105, (a) The entire boundary layer on the plate is turbulent (b) The boundary layer on the plate is fully developed (c) The entire boundary layer on the plate is laminar (d) The boundary layer on the plate begins as laminar, then it transitions to turbulent 2. The following is true about the total drag force on an arbitrarily shaped object immersed in a fluid flow with Reynolds number equal to 10: (a) it is inversely proportional to velocity. (b) it is directly proportional to velocity squared, V. (c) it is directly proportional to the density of the object. (d) it is directly proportional to particle diameter. 3. What is the drag coefficient, CD, of a small, smooth, spherical particle of diameter d = 5 m settling in the ambient air with Reynolds number 0.1? (a) 240 (b) 340 (c) 380 (d) 400 4. If the specific weight of a liquid is 187 lbf/ft, what is the liquid's specific gravity? (a) 0.187 (b) 2.99 (c) 5.81 (d) 96.4
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