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The vertical intercept between EGL and HGL is equal to

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+1 vote
in Fluid Mechanics by (118k points)
The vertical intercept between EGL and HGL is equal to

(a) pressure head

(b) potential head

(c) kinetic head

(d) Piezometric head

The question was asked during a job interview.

The above asked question is from Hydraulic Gradient and Total Energy Line topic in portion Flow Through Pipes of Fluid Mechanics

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Best answer
The correct choice is (c) kinetic head

Explanation: EGL is obtained by plotting total head and HGL is obtained by plotting piezometric head at various points along the axis of the pipe.

Hp = P ⁄ γ + z

where H is the total head, P ⁄ γ  is the pressure head, z is the potential head, Hp is the piezometric head, and v^2 / 2g is the velocity head.

 H – Hp = v^2 / 2g, the vertical intercept between EGL and HGL is equal to the kinetic head.

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