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In model similarity, if gravitational and inertial forces are the only contributing forces, which number must be kept constant to maintain similitude?

a$.$ Cauchy Number

b$.$ Froude Number

c$.$ Reynolds Number

d$.$ Weber Number

Which of the following statements most nearly approximates conditions in turbulent flow?

a$.$ Fluid particles move along smooth, straight paths

b$.$ Energy loss varies linearly with velocity

c$.$ Energy loss varies as the square of velocity

d$.$ Newton's law of viscosity governs the flow

Given the sample Moody Diagram blow:

Which of the following of the lines represents the friction factor to use for turbulent flow in a smooth pipe of low roughness ratio $($i$.$e$.,$ low $\frac{k_s}{D})?$

a$.$ A

b$.$ B

c$.$ C

d$.$ D

$4.$ If fluid flows in parallel, adjacent layers and the paths of individual particles do not cross, the flow is said to be

a$.$ Laminar

b$.$ Turbulent

c$.$ Critical

d$.$ Dynamic

$5.$ For turbulent flow of a fluid in a pipe, all of the following are true EXCEPT:

a$.$ The average velocity will be nearly the same as at the pipe center

b$.$ The energy lost due to turbulence and friction varies with kinetic energy

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