Hydraulics and Fluid Mechanics in ME
The discharge through a channel of rectangular section will be maximum, if

Its depth is twice the breadth
Its breadth is twice the depth
Its breadth is thrice the depth
Its depth is thrice the breadth

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Hydraulics and Fluid Mechanics in ME
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if

Loss of head and velocity of flow in both the pipes is same
Loss of head and discharge of both the pipes is same
Length of both the pipes is same
Diameter of both the pipes is same

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