單項(xiàng)選擇題

某一圓形有壓油管的直徑為d=150mm,流速v=0.256m/s,長(zhǎng)1km,雷諾數(shù)Re=1921,其沿程損失hf為()

A.74.25cm油柱
B.74.25mH2O
C.95.26cm油柱
D.62.26m油柱