Lesson 3 - Principles of Fluid Mechanics 1 SAQ

 * Which of the following combinations are fluids?

a)          Solids and gases

b)          Gases and liquids

c)          Liquids and solids

 * Which of the following describes the viscosity of a fluid?

a)          How dense a fluid is

b)          The cosine of the angle of runniness

c)          How easily a fluid flows

d)          How easily visible light can pass through the fluid

 * Newton’s law of viscosity defines the viscosity of a Newtonian fluid as what?
(More than one answer may be appropriate):

a)          A constant

b)          A constant of proportionality

c)          Independent of shear rate

d)          Independent of shear stress

e)          A function of shear rate

f)            A function of shear stress

g)          The ratio of shear stress to shear rate

h)          The ratio of shear rate to shear stress

 */** A Bourdon pressure gauge indicates a gauge pressure of 150 kN/m². What would be the absolute pressure, if the atmospheric pressure is 740 mm Hg? You may assume the density of mercury is 13,600 kg/m³.

 */** A carbon dioxide collection balloon may be considered a cylinder of 8 m in length and 3 m in diameter. If the internal pressure is 5 kPa (g), what will be the total force, and the net force, on the inside surfaces of the balloon? Atmospheric pressure is 95 kPa.

 ** Two identical bright beer tanks, A and B, are connected by a pipe and shut-off valves A and B, as shown in the figure below. When valves A and B are closed, the initial beer levels in both tanks, relative to the interconnecting pipe, are 7 m and 3 m, respectively. You may assume the tanks are open to atmosphere and that the beer density is 1,005 kg/m³.

If both valves are opened, what will the gauge pressures be for each tank, at the level of the interconnecting pipe? Explain your reasoning.