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1. A tank is filled with seawater to a depth of 12 ft. If the specific gravity of seawater is 1.03 and the atmospheric pressure at this location is 14.8 psi, the absolute pressure (psi) at the bottom of the tank is most nearly A. 5.4 B. 20.2 C. 26.8 D. 27.2 2. An open tank contains brine to a depth of 2 m and a 3-m layer of oil on top of the brine. Density of brine is 1,030 kg/m 3 and the density of oil is 880 kg/m 3 . The gage pressure (kPa) at the bottom of the tank is most nearly A. 4.7 B. 20.2 C. 25.6 D. 46.1 3. The figure shows two cylinders of diameter D and 2D, connected to each other and containing an incompressible fluid. The two cylinders are fitted with leak-proof pistons of weight W 1 and W 2 as shown. Which of the following is a correct expression? A. W 2 = W 1 /2 B. W 2 = W 1 C. W 2 = 2 W 1 D. W 2 = 4 W 1 4. The figure shows the relationship between shear stress and velocity gradient for two fluids, A and B. Which of the following is a true statement?
A. Absolute viscosity of A is greater than that of B B. Absolute viscosity of A is less than that of B C. Kinematic viscosity of A is greater than that of B D. Kinematic viscosity of A is less than that of B 5. A flat plate is sliding at a constant velocity of 5 m/s on a large horizontal table. A thin layer of oil (of absolute viscosity = 0.40 N-s/m 2 ) separates the plat from the table. To limit the shear stress in the oil layer to 1 kPa, the thickness of the oil film (mm) should be most nearly A. 0.2 B. 1.6 C. 2.0 D. 3.5 6. A 2-in. diameter shaft is supported by two sleeves, each of length = 2 in. as shown. The internal diameter of the sleeves is 2.1 in. The radial space between the shaft and the sleeves is filled with an oil of viscosity = 8x10 -3 lb-s/ft 2 . If the shaft is rotated at a speed of 600 rpm, the viscous torque (ft-lb) on the shaft is most nearly A. 0.15 B. 0.64 C. 3.20 D. 6.40 7. A 2-in. diameter cylinder is floating vertically in seawater with 75% of its volume submerged. If the specific gravity of seawater is 1.03, the specific weight (lb/cu ft) of the cylinder is most nearly A. 48.2 B. 64.2 C. 83.2 D. 85.7
8. A clean glass tube is to be selected in the design of a manometer to measure the pressure of kerosene. Specific gravity of kerosene = 0.82 and surface tension of kerosene = 0.025 N/m. If the capillary rise is to be limited to 1 mm, the smallest diameter (cm) of the glass tube should be most nearly A. 1.25 B. 1.50 C. 1.75 D. 2.00 9. An object weighs 275 N when fully immersed in water and 325 N when fully immersed in oil of specific gravity 0.9. The volume of the object (m 3 ) is most nearly A. 0.02 B. 0.05 C. 0.20 D. 0.50 10. A block of volume V and specific gravity, SG, is anchored by a light cable to the bottom of a lake as shown. If the specific weight of the water in the lake is gw, the tension, T, in the cable is given by A. B.
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