第二章For a body partially submerged in a fluid and at equilibrium, which of the following is a true statement?（ ）。
答案:The weight of the body is equal to the weight of the volume of fluid displaced
An inclined-tube manometer is being used as shown to measure the pressure in a pressurized tank. The tank is partially filled to a depth of 20 cm with a fluid of specific gravity = 0.78. The specific gravity of the manometric gage fluid is 3.5. The gage pressure in the headspace (kPa) when h = 8 cm is most nearly（ ）。
答案:0.3
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（ ）。
答案:1.25
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 W1 and W2 as shown. Which of the following is a correct expression?（ ）。
答案:=
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?（ ）。
答案:Absolute viscosity of A is greater than that of B
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