试题与答案

薄壁圆形孔口的直径d=10mm,作用水头H=2m。现测得射流收缩断面的直径dc=8m

题型:单项选择题

题目:

薄壁圆形孔口的直径d=10mm,作用水头H=2m。现测得射流收缩断面的直径dc=8mm,在32.8s时间内,经孔口流出的水量为0.01m3,该孔口的流量系数肚、流速系数为( )。

A.(A) 0.64 0.82

B.(B) 0.62 0.97

C.(C) 0.97 0.62

D.(D) 0.06 0.66

答案:

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参考答案:A

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