If V1 and V2 are the velocities of water at inlet and outlet of the d – McqOptions

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1.	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.	(V1 - V2) / V1
B.	(V1² - V2²) / V1²
C.	V1 / (V1 - V2)
D.	V1² / (V1² - V2²)
Answer» C. V1 / (V1 - V2)

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