Hydraulics and Fluid Mechanics in ME
If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

(V­1² - V2²) / V1²
V1 / (V1 - V2)
(V­1 - V2) / V1
V1² / (V1² - V2²)

ANSWER DOWNLOAD EXAMIANS APP

Hydraulics and Fluid Mechanics in ME
The conditions for the stable equilibrium of a floating body are

the center of buoyancy and the center of gravity must lie on the same vertical line
the meta-center should lie above the center of gravity
a righting couple should be formed
all the above are correct

ANSWER DOWNLOAD EXAMIANS APP