SSC JE Civil Engineering 25-Sep-2019 Shift 1 Solved Paper

Question : 112 of 200

Marks: +1, -0

In an open channel flow, the ratio of wetted area to wetted perimeter of the cross section is:

Hydraulic depth
Section factor
Hydraulic radius
Hydraulic exponent

Solution:

In an open channel flow, hydraulic radius,

R=A/P

, is the ratio of the water area to its wetted perimeter of the cross section.
Water area(A): It is the cross-sectional area of the flow normal to the direction of flow.
Wetted perimeter (P): It is the length of the line of intersection of the channel wetted surface with a cross-sectional plane normal to the direction of flow.

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