Hydraulics and Fluid Mechanics in ME
Coefficient of resistance is the ratio of

Area of jet at vena-contracta to the area of orifice
Actual discharge through an orifice to the theoretical discharge
Actual velocity of jet at vena-contracta to the theoretical velocity
Loss of head in the orifice to the head of water available at the exit of the orifice

ANSWER DOWNLOAD EXAMIANS APP

Hydraulics and Fluid Mechanics in ME
The purpose of a surge tank is

All of these
To control the pressure variations due to rapid changes in the pipe line flow
To regulate flow of water to turbines by providing necessary retarding head of water
To eliminate water hammer possibilities

ANSWER DOWNLOAD EXAMIANS APP