Two pipe systems in series are said to be equivalent when

1.	Two pipe systems in series are said to be equivalent when
A.	the average diameter in both systems is same
B.	the average friction factor in both systems is same
C.	the total length of the pipes is same in both the systems
D.	the discharge under the same head is same in both the systems
Answer» D. the discharge under the same head is same in both the systems

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Two pipe systems in series are said to be equivalent when

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