For the following questions answer them individually
A weir system in which the downstream water level of the weir nappe is higher than the crest is called _____.
When a piping system is made up primarily of friction head and very little of vertical lift, then pipe characteristics should be _____.
The hydraulic mean depth for a circular pipe of diameter 'd' running full is equal to _____.
Head loss in a flowing fluid is experienced due to _____.
A. friction at surface
B. change of direction
C. change of section of passage
D. obstruction in passage