When the ratio of r/z equals to 0.5, the Boussinesq influence factor i – McqOptions

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1.	When the ratio of r/z equals to 0.5, the Boussinesq influence factor is ________ of the maximum.
A.	23%
B.	57%
C.	17.7%
D.	1.8%
Answer» C. 17.7%

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