a which statements are true with regard to column separation? clrcle all that ap

Question

a which statements are true with regard to column separation? clrcle all that apply Het exam spring 2016 a, Column separation is the formation of a large vapor bubble in regions where the pressure og below vapor pressure. b. Column separation only occurs in vertical pipes. c. The expansion of a vapor bubble can cause the pipe to collapse. d. The walls of the vapor bubble can converge at speeds approaching twice the speed of sound in the fluid. e. Column separation can be mitigated by a vacuum break valve valves and air injection. c atego) would be

Explanation / Answer

a)Column seperation is the formation of a large vapour bubble in regions where the presuure drops below the vapour pressure.When the local pressure in a pipe system drops to the vapor pressure of the liquid, cavitating flow is established and the water column separates into two relatively independent segments.It is True

b)Column seperation occurs in both horizontal and vertical pipes.It is False

c)Both expansion and contraction of a vapour bubble can cause the pipe to collapse.It is True

d)The wall of the vapor bubble coverge at speeds approaching nearly the speed of sound in the fluid.It is False

e)Column seperation can be mitigated by a vacuum break valve and air injection.It is True

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