【单选题】
有一条水带干线，长度为7条胶里水带,其中5条为Ф90mm水带，2条为Ф65mm水带（每条Ф90mm、Ф65mm胶里水带阻抗系数分别为0.008、0.035），当流量为10L/s时，水带串联系统的压力损失为多少104Pa。 ___（ 难 ）
A. 0.43
B. 4.3
C. 1.1
D. 11
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答案
D
解析
暂无解析
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【单选题】
某消防车利用双干线并联供带架水枪，每条干线的长度为5条Φ65mm胶里水带，带架水枪流量为10 L/s，该水带并联系统的压力损失为多少104Pa。(水带的阻抗系数为0.035) ___（ 难 ）
A. 3.5
B. 4.378
C. 8.5
D. 14.875
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