it gives maximum discharge for a given cross-sectional area and bed slope

it has minimum wetted perimeter

it involves lesser excavation for the designed amount of discharge

all of the above

sill or crest

nappe or vein

orifice

none of these

Pascal's law

Archimede's principle

D-Alembert's principle

none of these

0.001

0.01

0.1

1

velocity of flow at the required point in a pipe

pressure difference between two points in a pipe

total pressure of liquid flowing in a pipe

discharge through a pipe