Hydraulics and Fluid Mechanics in ME
The discharge through a channel of trapezoidal section is maximum when

Width of channel at the top is equal to twice the width at the bottom
The sloping side is equal to the width at the bottom
The sloping side is equal to half the width at the top
Depth of channel is equal to the width at the bottom

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Hydraulics and Fluid Mechanics in ME
When a liquid is flowing through a pipe, the velocity of the liquid is

Maximum at the centre and zero near the walls
Zero at the centre and maximum near the walls
Maximum at the centre and minimum near the walls
Minimum at the centre and maximum near the walls

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