Which one of the following forms of draft tube will NOT improve the hydraulic efficiency of the turbine?

Which one of the following forms of draft tube will NOT improve the hy

1.	Which one of the following forms of draft tube will NOT improve the hydraulic efficiency of the turbine?
A.	Straight cylindrical
B.	Conical type
C.	(e) Bell-mouthed
D.	Bent tube.
Answer» B. Conical type

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Which one of the following forms of draft tube will NOT improve the hydraulic efficiency of the turbine?

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