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ESE 2021 ME Technical Quiz || Laminar & Turbulent flow & Losses in Pipe Flow

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Question 1

Identify the flow in which, the fluid on moving slowly gets a well-defined streak-line is known as:

Question 2

In a pipe flow, the pressure (P) of fluid varies according to the relation P = 4x2 + 3x kPa. Find the shear stress at wall for that pipe of diameter 500 mm at x = 2m.

Question 3

A pipe of diameter 300 mm and length 3500 m is used for transmission of power by water. The total head at the inlet of pipe is 500 m. The maximum power (in KW) available at outlet of pipe is _______ .(friction coefficient is 0.006 and density of water is 1000 kg/m3)

Question 4

In a turbulent flow , and are time averaged velocity components. The fluctuating components are u', v', w' respectively. The average kinetic energy per unit mass is given by.

Question 5

Consider steady flow of an incompressible fluid through two long and straight pipes of diameters d1 and d2 arranged in series. Both pipes are of equal length and the flow is turbulent in both pipes. The friction factor for turbulent flow though pipes is of the form  f =K(Re)–n , where K and n are known positive constants and Re is the Reynolds number. Neglecting minor losses, the ratio of the frictional pressure drop in pipe 1 to that in pipe 2, , is given by ___________.
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Apr 22ESE & GATE ME