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
A. $$\frac{{{{\text{V}}_1} - {{\text{V}}_2}}}{{{{\text{V}}_1}}}$$
B. $$\frac{{{\text{V}}_1^2 - {\text{V}}_2^2}}{{{\text{V}}_1^2}}$$
C. $$\frac{{{{\text{V}}_1}}}{{{{\text{V}}_1} - {{\text{V}}_2}}}$$
D. $$\frac{{{\text{V}}_1^2}}{{{\text{V}}_1^2 - {\text{V}}_2^2}}$$
Answer: Option B
This Question Belongs to Mechanical Engineering >> Hydraulics And Fluid Mechanics In ME
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