The hydraulic grade line is_________________?
(A) always above the centre line of pipe
(B) never above the energy grade line
(C) always sloping downward in the direction of flow
(D) all of the above
The hydraulic grade line is_________________?
(A) always above the centre line of pipe
(B) never above the energy grade line
(C) always sloping downward in the direction of flow
(D) all of the above
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