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

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

ANSWER DOWNLOAD EXAMIANS APP

Hydraulics and Fluid Mechanics in ME
An orifice is said to be large, if

The available head of liquid is less than 5 times the height of orifice
The size of orifice is large
The available head of liquid is more than 5 times the height of orifice
The velocity of flow is large

ANSWER DOWNLOAD EXAMIANS APP