2014年午前の専門知識第25問の解き方は？答えは？
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25. 油品を輸送するパイプラインで、油品の粘度は80cP、密度は920kg/m3であり、パイプの寸法はφ159×5で、輸送量は50トン/時である。このパイプラインの抵抗係数は、以下のうちどの値か？2014年午後25(A) 0.018 (B) 0.043 (C) 0.032 (D) 0.025
質量流量→体積流量→流速→Re→滞流→λ=64/Re
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